AI-generatedCastelsardo at a glance
- Best time
- Jun – Sep
- Warmest month
- Aug · 28°
- Warmest sea
- Aug · 25.1°
- Sunshine a year
- 2,750 h
- Rain a year
- 609 mm
- Climate
- Mediterranean
- Time zone
- UTC+1 / UTC+2
- Elevation
- 114 m
Climate in Castelsardo
Castelsardo has a Mediterranean climate with warm to hot, dry summers and mild, wetter winters. August is the warmest month with average highs of 28 °C, while January is the coolest at 13 °C. With around 2,750 hours of sunshine a year, Castelsardo is sunny; July is the sunniest month with 11.8 hours a day.
Holiday weather through the year
Best time to visit Castelsardo
The best time to visit Castelsardo is from June to September. For a beach holiday – sea from 21 °C, warm and mostly dry – go from June to September. For sightseeing, day trips and hiking, conditions are most comfortable from March to July and from September to October. The wettest month is November with 101 mm of precipitation.
Castelsardo through the seasons
How the weather changes over the seasons, with averages for each.
Castelsardo in spring
Mar – May
Poor
- 15–21 °C by day
- Sea 16 °C
- 7.8 h of sun a day
- 25 rainy days in all
Castelsardo in summer
Jun – Aug
Excellent
- 25–28 °C by day
- Sea 24 °C
- 11.3 h of sun a day
- 7 rainy days in all
Castelsardo in autumn
Sep – Nov
Fair
- 18–25 °C by day
- Sea 21 °C
- 6.5 h of sun a day
- 27 rainy days in all
Castelsardo in winter
Dec – Feb
Poor
- 13–15 °C by day
- Sea 14 °C
- 4.4 h of sun a day
- 30 rainy days in all
Which month for what?
Beach & swimming
Jun – Sep
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Mar – Jul, Sep – Oct
15–28 °C and not too much rain
Rainy months
Nov
Rainy season or more than 12 rainy days
Find your perfect month
Tell us what you like and we rate every month in Castelsardo for you.
Your best months: July – August
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Fair
Best time to visit: June – September
Where to go in OctoberSea temperature in October
Good forSightseeing & walks
A typical day in October
- Morning, 08:00: about 15°
- Midday, 13:00: about 22°
- Afternoon, 16:00: about 22°
- Evening, 20:00: about 19°
- Night, 23:00: about 17°
07:3518:46
Pleasant evenings; a light layer can help.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 07:18–08:12 · evening 18:09–19:03
- Blue hour
- Morning 07:07–07:18 · evening 19:03–19:14
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 Castelsardo compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs fall from about 24° at the start of the month to 20° at the end. The sea cools from 22° to 20°. The days get 1.3 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 24° | 20° |
| Night-time low | 16° | 13° |
| Sea | 22° | 20° |
| Daylight | 11.8 h | 10.5 h |
What is the weather like in Castelsardo in October?
In October, Castelsardo is warm: daytime highs average 22 °C, and nights cool down to about 15 °C. The sea averages 21.0 °C – refreshing for a swim. The sun shines for around 6.5 hours a day. Rain falls on about 8 days, adding up to 64 mm. All in all, October is a so-so month for a holiday in Castelsardo.
More details for October
- Daylight
- 11 h 11 min07:35 – 18:46
- UV index
- 4 · moderateclear sky, noon (estimate)All months
- Muggy days
- 1 daydew point 18 °C or moreAll months
- Wind
- 20 km/haverage daily peakAll months
- Cloud cover
- 48 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+2offset from UTC
How the score comes together
- Temperatureweight 35 %55 %
- Seaweight 25 %57 %
- Sunshineweight 20 %58 %
- Few rainy daysweight 20 %70 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- Swimwear
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Compare two months in Castelsardo
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
July has the better holiday weather in Castelsardo: score 100 against 59. In July, days are 6 °C warmer than in October. The sea is 3 °C warmer in July. July has 7 fewer rainy days. The sun shines 5 hours longer a day in July.
| Month | October | July |
|---|---|---|
| Holiday weather score | 59 | 100better |
| Daytime high | 22° | 28° |
| Night-time low | 15° | 19° |
| Sea | 21.0° | 24.2° |
| Sunshine | 6.5 h | 11.8 hbetter |
| Rainy days | 8 | 1better |
| Rainfall | 64 mm | 6 mmbetter |
| Muggy days | 1better | 18 |
Based on the climate averages 1996–2025.
Castelsardo month by month
The typical weather for every month at a glance.
15January13° · Sea 14° · 4.2 h
In January, Castelsardo is cool: daytime highs average 13 °C, and nights cool down to about 7 °C. The sea averages 14.0 °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 64 mm in total. All in all, January is not an ideal month for a holiday in Castelsardo.
Castelsardo in January20February13° · Sea 14° · 5.2 h
In February, Castelsardo is cool: daytime highs average 13 °C, and nights cool down to about 7 °C. The sea averages 13.5 °C – swimming is only for the hardy. Expect around 5.2 hours of sunshine a day. Rain falls on about 9 days, adding up to 56 mm. All in all, February is not an ideal month for a holiday in Castelsardo.
Castelsardo in February25March15° · Sea 14° · 6.6 h
In March, Castelsardo is cool: daytime highs average 15 °C, and nights cool down to about 8 °C. The sea averages 13.7 °C – swimming is only for the hardy. The sun shines for around 6.6 hours a day. Rain is frequent, with about 9 rainy days and 57 mm in total. All in all, March is not an ideal month for a holiday in Castelsardo.
Castelsardo in March28April18° · Sea 15° · 7.4 h
In April, Castelsardo is mild: daytime highs average 18 °C, and nights cool down to about 10 °C. The sea averages 15.1 °C – swimming is only for the hardy. The sun shines for around 7.4 hours a day. Rain falls on about 9 days, adding up to 56 mm. All in all, April is not an ideal month for a holiday in Castelsardo.
Castelsardo in April51May21° · Sea 18° · 9.4 h
In May, Castelsardo is warm: daytime highs average 21 °C, and nights cool down to about 13 °C. The sea averages 17.6 °C – bracing, so a wetsuit helps for longer swims. With around 9.4 hours of sunshine a day, there is plenty of sun. Rain falls on about 7 days, adding up to 49 mm. All in all, May is a so-so month for a holiday in Castelsardo.
Castelsardo in May90June25° · Sea 21° · 11.2 h
In June, Castelsardo is warm: daytime highs average 25 °C, and nights cool down to about 17 °C. The sea averages 21.3 °C – refreshing for a swim. With around 11.2 hours of sunshine a day, there is plenty of sun. Rain is rare: about 3 days bring 21 mm in total. All in all, June is an excellent month for a holiday in Castelsardo.
Castelsardo in June100July28° · Sea 24° · 11.8 h
In July, Castelsardo is hot: daytime highs average 28 °C, and nights cool down to about 19 °C. The sea averages 24.2 °C – pleasant for swimming. With around 11.8 hours of sunshine a day, there is plenty of sun. It hardly ever rains. On about 6 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, July is an excellent month for a holiday in Castelsardo.
Castelsardo in July100August28° · Sea 25° · 10.9 h
In August, Castelsardo is hot: daytime highs average 28 °C, and even at night it stays warm at around 20 °C. The sea averages 25.1 °C – pleasant for swimming. With around 10.9 hours of sunshine a day, there is plenty of sun. Rain is rare: about 2 days bring 13 mm in total. On about 8 days the thermometer climbs to 30 °C or more. The air is often humid and muggy. All in all, August is an excellent month for a holiday in Castelsardo.
Castelsardo in August93September25° · Sea 23° · 8.5 h
In September, Castelsardo is warm: daytime highs average 25 °C, and nights cool down to about 17 °C. The sea averages 23.3 °C – pleasant for swimming. The sun shines for around 8.5 hours a day. Rain falls on about 6 days, adding up to 45 mm. All in all, September is an excellent month for a holiday in Castelsardo.
Castelsardo in September59October22° · Sea 21° · 6.5 h
In October, Castelsardo is warm: daytime highs average 22 °C, and nights cool down to about 15 °C. The sea averages 21.0 °C – refreshing for a swim. The sun shines for around 6.5 hours a day. Rain falls on about 8 days, adding up to 64 mm. All in all, October is a so-so month for a holiday in Castelsardo.
Castelsardo in October18November18° · Sea 18° · 4.5 h
In November, Castelsardo is mild: daytime highs average 18 °C, and nights cool down to about 11 °C. The sea averages 18.4 °C – bracing, so a wetsuit helps for longer swims. Expect around 4.5 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 101 mm in total. All in all, November is not an ideal month for a holiday in Castelsardo.
Castelsardo in November13December15° · Sea 16° · 3.9 h
In December, Castelsardo is cool: daytime highs average 15 °C, and nights cool down to about 8 °C. The sea averages 15.5 °C – swimming is only for the hardy. The sun is scarce, with only about 3.9 hours a day. Rain is frequent, with about 11 rainy days and 77 mm in total. All in all, December is not an ideal month for a holiday in Castelsardo.
Castelsardo 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 Castelsardo
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°
- Warm 20–24°
- muggy month (15+ muggy days)
PleasantOctober: nights around 15°. Ideal for sleeping, often with the window open. Muggy on about 1 day (dew point 18 °C or more).
The coolest nights are in February (7°), the warmest in August (20°). Tropical nights of 20 °C and more are the rule in August; then air conditioning or a fan helps you sleep. Nights are pleasant for sleeping (15 to 20 °C) from June to July and from September to October. Nights fall below 8 °C on average from January to February, so the room should be heated. It is muggy (dew point 18 °C or more) on about 55 days a year, mostly from July to August.
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 | 15 | 13° | 7° | 14.0° | 4.2 h | 10 | 64 |
| FebruaryFeb | 20 | 13° | 7° | 13.5° | 5.2 h | 9 | 56 |
| MarchMar | 25 | 15° | 8° | 13.7° | 6.6 h | 9 | 57 |
| AprilApr | 28 | 18° | 10° | 15.1° | 7.4 h | 9 | 56 |
| MayMay | 51 | 21° | 13° | 17.6° | 9.4 h | 7 | 49 |
| JuneJun | 90 | 25° | 17° | 21.3° | 11.2 h | 3 | 21 |
| JulyJul | 100 | 28° | 19° | 24.2° | 11.8 h | 1 | 6 |
| AugustAug | 100 | 28° | 20° | 25.1° | 10.9 h | 2 | 13 |
| SeptemberSep | 93 | 25° | 17° | 23.3° | 8.5 h | 6 | 45 |
| OctoberOct | 59 | 22° | 15° | 21.0° | 6.5 h | 8 | 64 |
| NovemberNov | 18 | 18° | 11° | 18.4° | 4.5 h | 13 | 101 |
| DecemberDec | 13 | 15° | 8° | 15.5° | 3.9 h | 11 | 77 |
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
40.91° N, 8.71° E · 114 m · Europe/Rome
Sea temperature
Sea temperature in Castelsardo
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 20.0 – 22.3 °C
Swimming season: Jun – Oct
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Castelsardo ranges from 13.5 °C in February to 25.1 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to October.
From November to February 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 23.7 and 27.0 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 14.0° | 13.4° | 14.8° | cold |
| FebruaryFeb | 13.5° | 12.9° | 14.3° | cold |
| MarchMar | 13.7° | 13.2° | 14.4° | cold |
| AprilApr | 15.1° | 14.4° | 15.8° | cold |
| MayMay | 17.6° | 16.6° | 18.6° | fresh |
| JuneJun | 21.3° | 20.2° | 23.3° | refreshing |
| JulyJul | 24.2° | 22.5° | 25.8° | pleasant |
| AugustAug | 25.1° | 23.7° | 27.0° | pleasant |
| SeptemberSep | 23.3° | 22.1° | 24.8° | pleasant |
| OctoberOct | 21.0° | 20.0° | 22.3° | refreshing |
| NovemberNov | 18.4° | 17.0° | 19.8° | fresh |
| DecemberDec | 15.5° | 14.3° | 16.9° | cold |
Sunshine
Sunshine hours in Castelsardo
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 6.5 of 11.2 hours of daylight in Castelsardo, 58 % 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 Castelsardo: 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, Castelsardo has about 8 rainy days with 64 mm of rain in total.
UV index
UV index in Castelsardo
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 4 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 10).
Minutes until sunburn in October
- Very fair skin
- about 35 min
- Fair skin
- about 45 min
- Light brown skin
- about 60 min
- Olive skin
- about 75 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 Castelsardo
How breezy and how cloudy Castelsardo 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 Castelsardo typically peaks at 20 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: Sep – May.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 48 % of the sky over Castelsardo: variable cloud, with about 6.5 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 Castelsardo
How often the day gets hot in Castelsardo (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, Castelsardo has about 0 hot days, with an average daytime high of 22 °C: pleasant. Heat plays no part this month.
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 Castelsardo
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Castelsardo 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.
Castelsardo has its best school-holiday weather during the summer holidays (score 100) and its weakest during the Christmas holidays (score 14).
- 27
Easter holidays
Mar – Apr
Poor
- 17 °C by day
- Sea 15 °C
- 7.2 h of sun a day
- 9 rainy days a month
Good for: Sightseeing & walks
- 59
May half-term
May – Jun
Fair
- 22 °C by day
- Sea 18 °C
- 9.8 h of sun a day
- 6 rainy days a month
Good for: Sightseeing & walks
- 100
Summer holidays
Jul – Aug
ExcellentBest holidays
- 28 °C by day
- Sea 25 °C
- 11.2 h of sun a day
- 2 rainy days a month
Good for: Beach & swimming
- 59
October half-term
Oct
Fair
- 22 °C by day
- Sea 21 °C
- 6.5 h of sun a day
- 8 rainy days a month
Good for: Sightseeing & walks
- 14
Christmas holidays
Dec – Jan
Poor
- 14 °C by day
- Sea 15 °C
- 4.1 h of sun a day
- 11 rainy days a month
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 2 h 10 min
- Distance
- 1,370 km
- Time zone
- UTC+2
- 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: Italy
- Currency
- Euro (EUR)
- Language
- Italian
- Sockets
- Type C, F, L · 230 V
- Traffic
- Drives on the right
- Dialling code
- +39
- Emergency number
- 112
UK plugs need a travel adapter
Sources: GeoNames (CC BY 4.0) and Wikidata (CC0). Please check details before you travel.
Compare & alternatives
Compare with another place
Castelsardo compared
Put Castelsardo side by side with another destination.
Castelsardo vs Sassari
In October Castelsardo has the better holiday weather (score 59 vs 53). During the day it is about as warm in Sassari as in Castelsardo. Sassari gets one hour less sunshine a day.
| in October | Castelsardo | Sassari |
|---|---|---|
| Holiday weather score | 59 | 53 |
| Daytime high | 22° | 22° |
| Sea | 21° | no sea nearby |
| Sunshine | 7 h | 6 h |
| Rainy days | 8 | 9 |
| Best time | Jun – Sep | May – Sep |
Through the year
Best places in the country
Italy in October: the best places
In October, Castelsardo ranks 22 among the 31 nearest destinations in this country.
- Sassari22°81
- 2Grosseto23°79
- 3Cagliari24°22°77
- 4Viterbo21°77
- 5Rome23°77
- 6Castel Gandolfo20°77
- 7Orvieto21°76
- 8Pitigliano21°75
- 22CastelsardoThis page22°21°59
Places nearby
Near Castelsardo
Other destinations close by.
Places with a similar climate
Places with a climate like Castelsardo
Destinations whose weather through the year is closest to Castelsardo's – good alternatives.
Frequently asked questions about Castelsardo
When is the best time to visit Castelsardo?
The best time to visit Castelsardo is from June to September. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Castelsardo?
The sea temperature in Castelsardo ranges from 13.5 °C in February to 25.1 °C in August. It is warm enough for a comfortable swim (20 °C and more) from June to October.
Can you swim in Castelsardo in October?
Yes. In October the sea averages 21.0 °C – refreshing for a swim.
What is the warmest month in Castelsardo?
August is the warmest month, with average highs of 28 °C and nights around 20 °C. January is the coolest month at 13 °C.
When does it rain most in Castelsardo?
The wettest month is November with 101 mm of precipitation. The driest month is July with 6 mm.
How many hours of sunshine does Castelsardo get?
Castelsardo gets around 2,750 hours of sunshine a year. The sunniest month is July with 11.8 hours a day; in December there are 3.9 hours a day.
What time zone is Castelsardo in?
Castelsardo is on UTC+1 in January and UTC+2 in July.
How long is the flight from London to Castelsardo?
A nonstop flight from London to Castelsardo takes about 2 h 10 min, for a straight-line distance of about 1,370 km.
Which school holidays are best for Castelsardo?
Castelsardo has its best school-holiday weather during the summer holidays (score 100) and its weakest during the Christmas holidays (score 14). Holiday ratings (0–100): Easter holidays 27, May half-term 59, summer holidays 100, October half-term 59, Christmas holidays 14.