AI-generatedIsle of Portland at a glance
- Best time
- Jun – Aug
- Warmest month
- Aug · 20°
- Warmest sea
- Aug · 17.3°
- Sunshine a year
- 1,770 h
- Rain a year
- 745 mm
- Climate
- Maritime
- Time zone
- UTC+0 / UTC+1
- Elevation
- 11 m
Climate in Isle of Portland
Isle of Portland has a maritime climate with moderate summers and cool, often grey winters. August is the warmest month with average highs of 20 °C, while February is the coolest at 9 °C. With around 1,770 hours of sunshine a year, Isle of Portland is moderately sunny; June is the sunniest month with 7.6 hours a day.
Holiday weather through the year
Best time to visit Isle of Portland
The best time to visit Isle of Portland is from June to August. The sea stays too cool for a classic beach holiday: even in August it only reaches 17.3 °C. For sightseeing, day trips and hiking, conditions are most comfortable from May to September. The wettest month is October with 85 mm of precipitation.
Isle of Portland through the seasons
How the weather changes over the seasons, with averages for each.
Isle of Portland in spring
Mar – May
Poor
- 10–15 °C by day
- Sea 10 °C
- 5.9 h of sun a day
- 32 rainy days in all
Isle of Portland in summer
Jun – Aug
Poor
- 18–20 °C by day
- Sea 16 °C
- 7.2 h of sun a day
- 30 rainy days in all
Isle of Portland in autumn
Sep – Nov
Poor
- 12–19 °C by day
- Sea 16 °C
- 3.9 h of sun a day
- 33 rainy days in all
Isle of Portland in winter
Dec – Feb
Poor
- 9–10 °C by day
- Sea 10 °C
- 2.3 h of sun a day
- 34 rainy days in all
Which month for what?
Beach & swimming
No month
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
May – Sep
15–28 °C and not too much rain
Rainy months
Oct
Rainy season or more than 12 rainy days
Find your perfect month
Tell us what you like and we rate every month in Isle of Portland for you.
Your best months: June – August
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Poor
Best time to visit: June – August
Where to go in OctoberSea temperature in October
Keep in mindFrequent rain
A typical day in October
- Morning, 08:00: about 12°
- Midday, 13:00: about 15°
- Afternoon, 16:00: about 15°
- Evening, 20:00: about 14°
- Night, 23:00: about 13°
07:3018:20
Cool evenings: pack a jumper or a jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 07:10–08:15 · evening 17:35–18:41
- Blue hour
- Morning 06:58–07:10 · evening 18:41–18:53
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 Isle of Portland compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs fall from about 17° at the start of the month to 14° at the end. The sea cools from 16° to 15°. The days get 1.8 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 17° | 14° |
| Night-time low | 13° | 10° |
| Sea | 16° | 15° |
| Daylight | 11.7 h | 9.9 h |
What is the weather like in Isle of Portland in October?
In October, Isle of Portland is cool: daytime highs average 16 °C, and nights cool down to about 12 °C. The sea averages 15.8 °C – swimming is only for the hardy. The sun is scarce, with only about 3.7 hours a day. Rain is frequent, with about 13 rainy days and 85 mm in total. All in all, October is not an ideal month for a holiday in Isle of Portland.
More details for October
- Daylight
- 10 h 50 min07:30 – 18:20
- UV index
- 2 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 24 km/haverage daily peakAll months
- Cloud cover
- 71 %on averageAll months
- Hot days
- 0 days30 °C or more
- Time zone
- UTC+1offset from UTC
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %12 %
- Few rainy daysweight 20 %39 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- A jumper for the evenings
- Rain jacket or umbrella
Compare two months in Isle of Portland
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
August has the better holiday weather in Isle of Portland: score 30 against 10. In August, days are 4 °C warmer than in October. The sea is 2 °C warmer in August. August has 3 fewer rainy days. The sun shines 3 hours longer a day in August.
| Month | October | August |
|---|---|---|
| Holiday weather score | 10 | 30better |
| Daytime high | 16° | 20° |
| Night-time low | 12° | 15° |
| Sea | 15.8° | 17.3° |
| Sunshine | 3.7 h | 6.7 hbetter |
| Rainy days | 13 | 10better |
| Rainfall | 85 mm | 63 mmbetter |
Based on the climate averages 1996–2025.
Isle of Portland month by month
The typical weather for every month at a glance.
9January9° · Sea 10° · 2.1 h
In January, Isle of Portland is cold: daytime highs average 9 °C, and nights cool down to about 6 °C. The sea averages 9.6 °C – swimming is only for the hardy. The sun is scarce, with only about 2.1 hours a day. Rain is frequent, with about 12 rainy days and 68 mm in total. All in all, January is not an ideal month for a holiday in Isle of Portland.
Isle of Portland in January11February9° · Sea 9° · 3.0 h
In February, Isle of Portland is cold: daytime highs average 9 °C, and nights cool down to about 5 °C. The sea averages 8.7 °C – swimming is only for the hardy. The sun is scarce, with only about 3.0 hours a day. Rain is frequent, with about 10 rainy days and 54 mm in total. All in all, February is not an ideal month for a holiday in Isle of Portland.
Isle of Portland in February15March10° · Sea 9° · 4.2 h
In March, Isle of Portland is cool: daytime highs average 10 °C, and nights cool down to about 6 °C. The sea averages 8.5 °C – swimming is only for the hardy. Expect around 4.2 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 52 mm in total. All in all, March is not an ideal month for a holiday in Isle of Portland.
Isle of Portland in March22April12° · Sea 10° · 6.3 h
In April, Isle of Portland is cool: daytime highs average 12 °C, and nights cool down to about 8 °C. The sea averages 9.6 °C – swimming is only for the hardy. Expect around 6.3 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 54 mm in total. All in all, April is not an ideal month for a holiday in Isle of Portland.
Isle of Portland in April24May15° · Sea 12° · 7.1 h
In May, Isle of Portland is cool: daytime highs average 15 °C, and nights cool down to about 10 °C. The sea averages 11.5 °C – swimming is only for the hardy. The sun shines for around 7.1 hours a day. Rain is frequent, with about 11 rainy days and 58 mm in total. All in all, May is not an ideal month for a holiday in Isle of Portland.
Isle of Portland in May26June18° · Sea 14° · 7.6 h
In June, Isle of Portland is mild: daytime highs average 18 °C, and nights cool down to about 13 °C. The sea averages 13.9 °C – swimming is only for the hardy. The sun shines for around 7.6 hours a day. Rain is frequent, with about 11 rainy days and 57 mm in total. All in all, June is not an ideal month for a holiday in Isle of Portland – and yet one of the best months here.
Isle of Portland in June29July20° · Sea 16° · 7.4 h
In July, Isle of Portland is mild: daytime highs average 20 °C, and nights cool down to about 15 °C. The sea averages 16.0 °C – swimming is only for the hardy. The sun shines for around 7.4 hours a day. Rain is frequent, with about 10 rainy days and 50 mm in total. All in all, July is not an ideal month for a holiday in Isle of Portland – and yet one of the best months here.
Isle of Portland in July30August20° · Sea 17° · 6.7 h
In August, Isle of Portland is mild: daytime highs average 20 °C, and nights cool down to about 15 °C. The sea averages 17.3 °C – bracing, so a wetsuit helps for longer swims. The sun shines for around 6.7 hours a day. Rain is frequent, with about 10 rainy days and 63 mm in total. All in all, August is not an ideal month for a holiday in Isle of Portland – and yet one of the best months here.
Isle of Portland in August23September19° · Sea 17° · 5.5 h
In September, Isle of Portland is mild: daytime highs average 19 °C, and nights cool down to about 14 °C. The sea averages 17.2 °C – bracing, so a wetsuit helps for longer swims. Expect around 5.5 hours of sunshine a day. Rain falls on about 8 days, adding up to 52 mm. All in all, September is not an ideal month for a holiday in Isle of Portland.
Isle of Portland in September10October16° · Sea 16° · 3.7 h
In October, Isle of Portland is cool: daytime highs average 16 °C, and nights cool down to about 12 °C. The sea averages 15.8 °C – swimming is only for the hardy. The sun is scarce, with only about 3.7 hours a day. Rain is frequent, with about 13 rainy days and 85 mm in total. All in all, October is not an ideal month for a holiday in Isle of Portland.
Isle of Portland in October9November12° · Sea 14° · 2.5 h
In November, Isle of Portland is cool: daytime highs average 12 °C, and nights cool down to about 9 °C. The sea averages 13.5 °C – swimming is only for the hardy. The sun is scarce, with only about 2.5 hours a day. Rain is frequent, with about 12 rainy days and 79 mm in total. All in all, November is not an ideal month for a holiday in Isle of Portland.
Isle of Portland in November9December10° · Sea 11° · 1.9 h
In December, Isle of Portland is cool: daytime highs average 10 °C, and nights cool down to about 7 °C. The sea averages 11.2 °C – swimming is only for the hardy. The sun is scarce, with only about 1.9 hours a day. Rain is frequent, with about 12 rainy days and 74 mm in total. All in all, December is not an ideal month for a holiday in Isle of Portland.
Isle of Portland 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 Isle of Portland
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Cold 0–8°
- Cool 8–15°
- Pleasant 15–20°
CoolOctober: nights around 12°. A duvet at night and a jumper for the evening.
The coolest nights are in February (5°), the warmest in August (15°). Nights are pleasant for sleeping (15 to 20 °C) from July to August. Nights fall below 8 °C on average from December to March, so the room should be heated.
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 | 9 | 9° | 6° | 9.6° | 2.1 h | 12 | 68 |
| FebruaryFeb | 11 | 9° | 5° | 8.7° | 3.0 h | 10 | 54 |
| MarchMar | 15 | 10° | 6° | 8.5° | 4.2 h | 10 | 52 |
| AprilApr | 22 | 12° | 8° | 9.6° | 6.3 h | 11 | 54 |
| MayMay | 24 | 15° | 10° | 11.5° | 7.1 h | 11 | 58 |
| JuneJun | 26 | 18° | 13° | 13.9° | 7.6 h | 11 | 57 |
| JulyJul | 29 | 20° | 15° | 16.0° | 7.4 h | 10 | 50 |
| AugustAug | 30 | 20° | 15° | 17.3° | 6.7 h | 10 | 63 |
| SeptemberSep | 23 | 19° | 14° | 17.2° | 5.5 h | 8 | 52 |
| OctoberOct | 10 | 16° | 12° | 15.8° | 3.7 h | 13 | 85 |
| NovemberNov | 9 | 12° | 9° | 13.5° | 2.5 h | 12 | 79 |
| DecemberDec | 9 | 10° | 7° | 11.2° | 1.9 h | 12 | 74 |
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
50.57° N, 2.44° W · 11 m · Europe/London
Sea temperature
Sea temperature in Isle of Portland
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 15.2 – 16.4 °C
Swimming season: Always below 20 °C
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Isle of Portland ranges from 8.5 °C in March to 17.3 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
From October to January the sea is even warmer than the afternoon air. The sea temperature varies from year to year: in August, eight out of ten years were between 16.7 and 18.0 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 9.6° | 8.4° | 10.5° | cold |
| FebruaryFeb | 8.7° | 7.5° | 9.7° | cold |
| MarchMar | 8.5° | 7.2° | 9.6° | cold |
| AprilApr | 9.6° | 8.5° | 10.5° | cold |
| MayMay | 11.5° | 10.5° | 12.5° | cold |
| JuneJun | 13.9° | 13.3° | 14.8° | cold |
| JulyJul | 16.0° | 15.2° | 16.9° | cold |
| AugustAug | 17.3° | 16.7° | 18.0° | fresh |
| SeptemberSep | 17.2° | 16.5° | 17.9° | fresh |
| OctoberOct | 15.8° | 15.2° | 16.4° | cold |
| NovemberNov | 13.5° | 12.7° | 14.3° | cold |
| DecemberDec | 11.2° | 10.4° | 11.9° | cold |
Sunshine
Sunshine hours in Isle of Portland
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 3.7 of 10.8 hours of daylight in Isle of Portland, 34 % 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 Isle of Portland: 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, Isle of Portland has about 13 rainy days with 85 mm of rain in total.
UV index
UV index in Isle of Portland
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 2 · lowLittle protection needed; sunglasses on bright days.
The sun is strongest in June (UV 8).
Minutes until sunburn in October
- Very fair skin
- about 65 min
- Fair skin
- about 80 min
- Light brown skin
- about 115 min
- Olive skin
- over 2 h
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 Isle of Portland
How breezy and how cloudy Isle of Portland 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 Isle of Portland typically peaks at 24 km/h during the day: Beaufort 4, moderate 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 71 % of the sky over Isle of Portland: mostly cloudy, with about 3.7 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.
Planning a trip to Isle of Portland
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Isle of Portland 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.
Isle of Portland has its best school-holiday weather during the summer holidays (score 30) and its weakest during the Christmas holidays (score 9).
- 20
Easter holidays
Mar – Apr
Poor
- 12 °C by day
- Sea 9 °C
- 5.7 h of sun a day
- 11 rainy days a month
- 24
May half-term
May – Jun
Poor
- 16 °C by day
- Sea 12 °C
- 7.2 h of sun a day
- 11 rainy days a month
Good for: Sightseeing & walks
- 30
Summer holidays
Jul – Aug
PoorBest holidays
- 20 °C by day
- Sea 17 °C
- 6.9 h of sun a day
- 10 rainy days a month
Good for: Sightseeing & walks
- 10
October half-term
Oct
Poor
- 16 °C by day
- Sea 16 °C
- 3.7 h of sun a day
- 13 rainy days a month
Keep in mind: Frequent rain
- 9
Christmas holidays
Dec – Jan
Poor
- 10 °C by day
- Sea 10 °C
- 2.0 h of sun a day
- 12 rainy days a month
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- Short trip – train or car is often quicker
- Distance
- 170 km
- Time zone
- UTC+1
- Jet lag
- Hardly any (under 3 h)
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Good to know: United Kingdom
- Currency
- British Pound (GBP)
- Language
- English
- Sockets
- Type G · 230 V
- Traffic
- Drives on the left
- Dialling code
- +44
- Emergency number
- 999 · 112
UK plugs fit
Sources: GeoNames (CC BY 4.0) and Wikidata (CC0). Please check details before you travel.
Compare & alternatives
Compare with another place
Isle of Portland compared
Put Isle of Portland side by side with another destination.
Isle of Portland vs Weymouth
In October the holiday weather in Isle of Portland and Weymouth is about equally good (score 10 vs 10). During the day it is about as warm in Weymouth as in Isle of Portland. The sea is about equally warm.
| in October | Isle of Portland | Weymouth |
|---|---|---|
| Holiday weather score | 10 | 10 |
| Daytime high | 16° | 16° |
| Sea | 16° | 16° |
| Sunshine | 4 h | 4 h |
| Rainy days | 13 | 13 |
| Best time | Jun – Aug | Jun – Aug |
Through the year
Best places in the country
United Kingdom in October: the best places
In October, Isle of Portland ranks 24 among the 31 nearest destinations in this country.
- Portsmouth16°16°54
- 2Wells15°53
- 3Poole16°16°52
- 4Glastonbury16°52
- 5Winchester15°52
- 6Salisbury15°51
- 7Reading15°51
- 8Southampton16°16°50
- 24Isle of PortlandThis page16°16°10
Places nearby
Near Isle of Portland
Other destinations close by.
Places with a similar climate
Places with a climate like Isle of Portland
Destinations whose weather through the year is closest to Isle of Portland's – good alternatives.
Frequently asked questions about Isle of Portland
When is the best time to visit Isle of Portland?
The best time to visit Isle of Portland is from June to August. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Isle of Portland?
The sea temperature in Isle of Portland ranges from 8.5 °C in March to 17.3 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
Can you swim in Isle of Portland in October?
Only if you don't mind cold water: in October the sea averages just 15.8 °C. Comfortable swimming temperatures are not reached at any time of year.
What is the warmest month in Isle of Portland?
August is the warmest month, with average highs of 20 °C and nights around 15 °C. February is the coolest month at 9 °C.
When does it rain most in Isle of Portland?
The wettest month is October with 85 mm of precipitation. The driest month is July with 50 mm.
How many hours of sunshine does Isle of Portland get?
Isle of Portland gets around 1,770 hours of sunshine a year. The sunniest month is June with 7.6 hours a day; in December there are 1.9 hours a day.
What time zone is Isle of Portland in?
Isle of Portland is on UTC+0 in January and UTC+1 in July.
Which school holidays are best for Isle of Portland?
Isle of Portland has its best school-holiday weather during the summer holidays (score 30) and its weakest during the Christmas holidays (score 9). Holiday ratings (0–100): Easter holidays 20, May half-term 24, summer holidays 30, October half-term 10, Christmas holidays 9.