AI-generatedOnslow at a glance
- Best time
- Apr – Nov
- Warmest month
- Jan · 37°
- Warmest sea
- Mar · 29.4°
- Sunshine a year
- 3,330 h
- Rain a year
- 215 mm
- Climate
- Hot desert
- Time zone
- UTC+8
- Elevation
- 7 m
Climate in Onslow
Onslow has a hot desert climate with sunshine almost every day and hardly any rain. January is the warmest month with average highs of 37 °C, while July is the coolest at 26 °C. With around 3,330 hours of sunshine a year, Onslow is very sunny; November is the sunniest month with 11.1 hours a day.
Holiday weather through the year
Best time to visit Onslow
The best time to visit Onslow is from April to November. For a beach holiday – sea from 21 °C, warm and mostly dry – go all year round. For sightseeing, day trips and hiking, conditions are most comfortable from June to July. From October to April it can get very hot, with highs of up to 37 °C. The wettest month is March with 49 mm of precipitation.
Onslow through the seasons
How the weather changes over the seasons, with averages for each.
Onslow in spring
Sep – Nov
Excellent
- 30–34 °C by day
- Sea 24 °C
- 10.4 h of sun a day
- 1 rainy day in all
Onslow in summer
Dec – Feb
Good
- 36–37 °C by day
- Sea 28 °C
- 9.9 h of sun a day
- 7 rainy days in all
Onslow in autumn
Mar – May
Excellent
- 30–36 °C by day
- Sea 28 °C
- 8.2 h of sun a day
- 7 rainy days in all
Onslow in winter
Jun – Aug
Excellent
- 26–28 °C by day
- Sea 23 °C
- 7.9 h of sun a day
- 6 rainy days in all
Which month for what?
Beach & swimming
All year
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Jun – Jul
15–28 °C and not too much rain
Peak heat
Oct – Apr
Highs of 33 °C or more
Find your perfect month
Tell us what you like and we rate every month in Onslow for you.
Your best months: May – June, August
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Excellent
Best time to visit: April – November
Where to go in OctoberSea temperature in October
Good forBeach & swimming
Keep in mindPeak heat
A typical day in October
- Morning, 08:00: about 25°
- Midday, 13:00: about 33°
- Afternoon, 16:00: about 32°
- Evening, 20:00: about 26°
- Night, 23:00: about 23°
05:4818:22
Warm enough for a T-shirt in the evening.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 05:35–06:18 · evening 17:52–18:36
- Blue hour
- Morning 05:26–05:35 · evening 18:36–18:45
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
October in Onslow compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs rise from about 32° at the start of the month to 34° at the end. The sea warms from 23° to 25°. The days get 0.6 h longer.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 32° | 34° |
| Night-time low | 18° | 20° |
| Sea | 23° | 25° |
| Daylight | 12.3 h | 12.9 h |
What is the weather like in Onslow in October?
In October, Onslow is very hot: daytime highs average 34 °C, and nights cool down to about 19 °C. The sea averages 24.0 °C – pleasant for swimming. With around 10.4 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 27 days the thermometer climbs to 30 °C or more. It is often windy: on a typical day the wind peaks at around 29 km/h. All in all, October is an excellent month for a holiday in Onslow.
More details for October
- Daylight
- 12 h 34 min05:48 – 18:22
- UV index
- 12 · extremeclear sky, noon (estimate)All months
- Muggy days
- 1 daydew point 18 °C or moreAll months
- Wind
- 29 km/haverage daily peakAll months
- Cloud cover
- 10 %on averageAll months
- Hot days
- 27 days30 °C or moreAll months
- Time zone
- UTC+8offset from UTC
How the score comes together
- Temperatureweight 35 %64 %
- Seaweight 25 %100 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 20 %100 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Light, breathable clothes
- Water bottle – drink plenty
- Windproof jacket
Compare two months in Onslow
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
May has the better holiday weather in Onslow: score 96 against 88. In May, days are 4 °C cooler than in October. The sea is 2 °C warmer in May. May has 3 more rainy days. The sun shines 3 hours less a day in May.
| Month | October | May |
|---|---|---|
| Holiday weather score | 88 | 96better |
| Daytime high | 34° | 30° |
| Night-time low | 19° | 18° |
| Sea | 24.0° | 26.1° |
| Sunshine | 10.4 hbetter | 7.7 h |
| Rainy days | 0better | 3 |
| Rainfall | 0 mmbetter | 31 mm |
| Muggy days | 1better | 6 |
Based on the climate averages 1996–2025.
Onslow month by month
The typical weather for every month at a glance.
73January37° · Sea 28° · 9.9 h
In January, Onslow is very hot: daytime highs average 37 °C, and even at night it stays warm at around 25 °C. The sea averages 28.3 °C – lovely and warm for swimming. With around 9.9 hours of sunshine a day, there is plenty of sun. Rain is rare: about 3 days bring 24 mm in total. On about 30 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. It is often windy: on a typical day the wind peaks at around 30 km/h. All in all, January is a good month for a holiday in Onslow.
Onslow in January74February36° · Sea 29° · 9.4 h
In February, Onslow is very hot: daytime highs average 36 °C, and even at night it stays warm at around 26 °C. The sea averages 29.2 °C – almost as warm as a bath. With around 9.4 hours of sunshine a day, there is plenty of sun. Rain is rare: about 4 days bring 34 mm in total. On about 27 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. It is often windy: on a typical day the wind peaks at around 28 km/h. All in all, February is a good month for a holiday in Onslow.
Onslow in February72March36° · Sea 29° · 8.7 h
In March, Onslow is very hot: daytime highs average 36 °C, and even at night it stays warm at around 25 °C. The sea averages 29.4 °C – almost as warm as a bath. The sun shines for around 8.7 hours a day. Rain is rare: about 3 days bring 49 mm in total. On about 30 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, March is a good month for a holiday in Onslow.
Onslow in March81April34° · Sea 28° · 8.2 h
In April, Onslow is very hot: daytime highs average 34 °C, and even at night it stays warm at around 23 °C. The sea averages 28.2 °C – lovely and warm for swimming. The sun shines for around 8.2 hours a day. It hardly ever rains. On about 29 days the thermometer climbs to 30 °C or more. All in all, April is an excellent month for a holiday in Onslow.
Onslow in April96May30° · Sea 26° · 7.7 h
In May, Onslow is hot: daytime highs average 30 °C, and nights cool down to about 18 °C. The sea averages 26.1 °C – lovely and warm for swimming. The sun shines for around 7.7 hours a day. Rain is rare: about 3 days bring 31 mm in total. On about 16 days the thermometer climbs to 30 °C or more. All in all, May is an excellent month for a holiday in Onslow.
Onslow in May94June27° · Sea 24° · 7.3 h
In June, Onslow is warm: daytime highs average 27 °C, and nights cool down to about 15 °C. The sea averages 24.0 °C – pleasant for swimming. The sun shines for around 7.3 hours a day. Rain is rare: about 3 days bring 32 mm in total. All in all, June is an excellent month for a holiday in Onslow.
Onslow in June91July26° · Sea 23° · 7.8 h
In July, Onslow is warm: daytime highs average 26 °C, and nights cool down to about 14 °C. The sea averages 22.7 °C – refreshing for a swim. The sun shines for around 7.8 hours a day. It hardly ever rains. All in all, July is an excellent month for a holiday in Onslow.
Onslow in July93August28° · Sea 22° · 8.7 h
In August, Onslow is hot: daytime highs average 28 °C, and nights cool down to about 14 °C. The sea averages 22.3 °C – refreshing for a swim. The sun shines for around 8.7 hours a day. It hardly ever rains. On about 5 days the thermometer climbs to 30 °C or more. All in all, August is an excellent month for a holiday in Onslow.
Onslow in August95September30° · Sea 23° · 9.7 h
In September, Onslow is hot: daytime highs average 30 °C, and nights cool down to about 16 °C. The sea averages 22.7 °C – refreshing for a swim. With around 9.7 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 16 days the thermometer climbs to 30 °C or more. All in all, September is an excellent month for a holiday in Onslow.
Onslow in September88October34° · Sea 24° · 10.4 h
In October, Onslow is very hot: daytime highs average 34 °C, and nights cool down to about 19 °C. The sea averages 24.0 °C – pleasant for swimming. With around 10.4 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 27 days the thermometer climbs to 30 °C or more. It is often windy: on a typical day the wind peaks at around 29 km/h. All in all, October is an excellent month for a holiday in Onslow.
Onslow in October84November34° · Sea 25° · 11.1 h
In November, Onslow is very hot: daytime highs average 34 °C, and even at night it stays warm at around 21 °C. The sea averages 25.3 °C – pleasant for swimming. With around 11.1 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 27 days the thermometer climbs to 30 °C or more. It is often windy: on a typical day the wind peaks at around 30 km/h. All in all, November is an excellent month for a holiday in Onslow.
Onslow in November76December36° · Sea 27° · 10.5 h
In December, Onslow is very hot: daytime highs average 36 °C, and even at night it stays warm at around 23 °C. The sea averages 26.8 °C – lovely and warm for swimming. With around 10.5 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 30 days the thermometer climbs to 30 °C or more. It is often windy: on a typical day the wind peaks at around 30 km/h. All in all, December is a good month for a holiday in Onslow.
Onslow in DecemberClimate in detail
Year & climate table
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Onslow
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Cool 8–15°
- Pleasant 15–20°
- Warm 20–24°
- Hot 24° and more
- muggy month (15+ muggy days)
PleasantOctober: nights around 19°. Ideal for sleeping, often with the window open. Muggy on about 1 day (dew point 18 °C or more).
The coolest nights are in July (14°), the warmest in February (26°). Tropical nights of 20 °C and more are the rule from November to April; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) from May to June and from September to October. It is muggy (dew point 18 °C or more) on about 106 days a year, mostly from January to March.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 73 | 37° | 25° | 28.3° | 9.9 h | 3 | 24 |
| FebruaryFeb | 74 | 36° | 26° | 29.2° | 9.4 h | 4 | 34 |
| MarchMar | 72 | 36° | 25° | 29.4° | 8.7 h | 3 | 49 |
| AprilApr | 81 | 34° | 23° | 28.2° | 8.2 h | 2 | 19 |
| MayMay | 96 | 30° | 18° | 26.1° | 7.7 h | 3 | 31 |
| JuneJun | 94 | 27° | 15° | 24.0° | 7.3 h | 3 | 32 |
| JulyJul | 91 | 26° | 14° | 22.7° | 7.8 h | 2 | 14 |
| AugustAug | 93 | 28° | 14° | 22.3° | 8.7 h | 1 | 5 |
| SeptemberSep | 95 | 30° | 16° | 22.7° | 9.7 h | 0 | 1 |
| OctoberOct | 88 | 34° | 19° | 24.0° | 10.4 h | 0 | 0 |
| NovemberNov | 84 | 34° | 21° | 25.3° | 11.1 h | 0 | 1 |
| DecemberDec | 76 | 36° | 23° | 26.8° | 10.5 h | 1 | 5 |
Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
21.64° S, 115.11° E · 7 m · Australia/Perth
Sea temperature
Sea temperature in Onslow
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 23.2 – 25.1 °C
Swimming season: all year
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Onslow ranges from 22.3 °C in August to 29.4 °C in March. At 20 °C and more, the sea is warm enough for swimming all year round.
The sea warms up slowly: it is warmest in March, while the air already peaks in January. The sea temperature varies from year to year: in March, eight out of ten years were between 28.7 and 30.3 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 28.3° | 26.7° | 29.9° | warm |
| FebruaryFeb | 29.2° | 28.0° | 30.2° | very warm |
| MarchMar | 29.4° | 28.7° | 30.3° | very warm |
| AprilApr | 28.2° | 27.5° | 28.9° | warm |
| MayMay | 26.1° | 25.4° | 27.0° | warm |
| JuneJun | 24.0° | 23.4° | 24.8° | pleasant |
| JulyJul | 22.7° | 21.5° | 24.1° | refreshing |
| AugustAug | 22.3° | 21.9° | 23.0° | refreshing |
| SeptemberSep | 22.7° | 21.9° | 23.6° | refreshing |
| OctoberOct | 24.0° | 23.2° | 25.1° | pleasant |
| NovemberNov | 25.3° | 24.3° | 26.5° | pleasant |
| DecemberDec | 26.8° | 25.4° | 28.0° | warm |
Sunshine
Sunshine hours in Onslow
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 10.4 of 12.6 hours of daylight in Onslow, 83 % of the daylight hours.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
Rain
Rain in Onslow: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, it hardly ever rains in Onslow: 0 mm in the whole month.
UV index
UV index in Onslow
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 12 · extremeAvoid the midday sun; SPF 50+, covering clothes, hat and sunglasses.
The sun is strongest in January (UV 12).
Minutes until sunburn in October
- Very fair skin
- about 10 min
- Fair skin
- about 15 min
- Light brown skin
- about 20 min
- Olive skin
- about 25 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen the time, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Wind & clouds
Wind and clouds in Onslow
How breezy and how cloudy Onslow is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Onslow typically peaks at 29 km/h during the day: Beaufort 5, fresh breeze.
Breezy months for windsurfing and kiting
From Beaufort 4 (20 km/h) the daily breeze is usually enough for windsurfing and often for kiting, and here it is that strong all year.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 10 % of the sky over Onslow: mostly clear, with about 10.4 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat & humidity
Heat and humidity in Onslow
How often the day gets hot in Onslow (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Onslow has about 27 hot days, with an average daytime high of 34 °C: often hot. Avoid the midday sun, look for shade and drink plenty.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Planning a trip to Onslow
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Onslow in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Onslow has its best school-holiday weather during May half-term (score 96) and its weakest during the Christmas holidays (score 75).
- 78
Easter holidays
Mar – Apr
Good
- 35 °C by day
- Sea 29 °C
- 8.4 h of sun a day
- 2 rainy days a month
Good for: Beach & swimming
Keep in mind: Peak heat, Storm season
- 96
May half-term
May – Jun
ExcellentBest holidays
- 29 °C by day
- Sea 26 °C
- 7.6 h of sun a day
- 3 rainy days a month
Good for: Beach & swimming
- 92
Summer holidays
Jul – Aug
Excellent
- 27 °C by day
- Sea 22 °C
- 8.4 h of sun a day
- 1 rainy day a month
Good for: Beach & swimming
- 88
October half-term
Oct
Excellent
- 34 °C by day
- Sea 24 °C
- 10.4 h of sun a day
- 0 rainy days a month
Good for: Beach & swimming
Keep in mind: Peak heat
- 75
Christmas holidays
Dec – Jan
Good
- 36 °C by day
- Sea 28 °C
- 10.2 h of sun a day
- 2 rainy days a month
Good for: Beach & swimming
Keep in mind: Peak heat, Storm season
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 16 h 55 min
- Distance
- 13,630 km
- Time zone
- UTC+8
- Jet lag
- About 7 days (7 h east)
Rule of thumb for flying east: for a few days before, go to bed and get up a little earlier, and get plenty of morning light at your destination.
Most routes need a change of planes, which adds time.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Good to know: Australia
- Currency
- Australian Dollar (AUD)
- Language
- English
- Sockets
- Type I · 230 V
- Traffic
- Drives on the left
- Dialling code
- +61
- Emergency number
- 000
UK plugs need a travel adapter
Sources: GeoNames (CC BY 4.0) and Wikidata (CC0). Please check details before you travel.
Storm season
Onslow lies in an area that Australian tropical cyclones can reach. The cyclone season runs from November to April, with most storms from January to March. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
- January: Peak
- February: Peak
- March: Peak
- April: Season
- May
- June
- July
- August
- September
- October
- November: Season
- December: Season
Official season dates of the regional warning centres (NOAA, JMA, IMD, Météo-France, BoM, Fiji Meteorological Service); not a forecast.
Compare & alternatives
Compare with another place
Onslow compared
Put Onslow side by side with another destination.
Onslow vs Exmouth
In October Exmouth has the better holiday weather (score 99 vs 88). During the day Exmouth is 4 °C cooler than Onslow. The sea is about equally warm.
| in October | Onslow | Exmouth |
|---|---|---|
| Holiday weather score | 88 | 99 |
| Daytime high | 34° | 30° |
| Sea | 24° | 24° |
| Sunshine | 10 h | 10 h |
| Rainy days | 0 | 0 |
| Best time | Apr – Nov | All year |
Through the year
Best places in the country
Australia in October: the best places
In October, Onslow ranks 8 among the 31 nearest destinations in this country.
- Karratha31°26°100
- 2York25°100
- 3Kalgoorlie27°100
- 4Exmouth30°24°99
- 5Perth24°19°97
- 6Carnarvon27°21°91
- 7Broome33°28°89
- 8OnslowThis page34°24°88
Places nearby
Near Onslow
Other destinations close by.
Places with a similar climate
Places with a climate like Onslow
Destinations whose weather through the year is closest to Onslow's – good alternatives.
Frequently asked questions about Onslow
When is the best time to visit Onslow?
The best time to visit Onslow is from April to November. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Onslow?
The sea temperature in Onslow ranges from 22.3 °C in August to 29.4 °C in March. At 20 °C and more, the sea is warm enough for swimming all year round.
Can you swim in Onslow in October?
Yes. In October the sea averages 24.0 °C – pleasant for swimming.
What is the warmest month in Onslow?
January is the warmest month, with average highs of 37 °C and nights around 25 °C. July is the coolest month at 26 °C.
When does it rain most in Onslow?
The wettest month is March with 49 mm of precipitation. The driest month is October with 0 mm.
How many hours of sunshine does Onslow get?
Onslow gets around 3,330 hours of sunshine a year. The sunniest month is November with 11.1 hours a day; in June there are 7.3 hours a day.
What time zone is Onslow in?
Onslow is on UTC+8 all year.
How long is the flight from London to Onslow?
A nonstop flight from London to Onslow takes about 16 h 55 min, for a straight-line distance of about 13,630 km. Most routes need a change of planes, which adds time.
When is cyclone season in Onslow?
Onslow lies in an area that Australian tropical cyclones can reach. The cyclone season runs from November to April, with most storms from January to March. A direct hit on any one place is rare, but if you travel then, keep an eye on weather warnings and book flexibly.
Which school holidays are best for Onslow?
Onslow has its best school-holiday weather during May half-term (score 96) and its weakest during the Christmas holidays (score 75). Holiday ratings (0–100): Easter holidays 78, May half-term 96, summer holidays 92, October half-term 88, Christmas holidays 75.