AI-generatedCastro Urdiales at a glance
- Best time
- Jul – Sep
- Warmest month
- Aug · 27°
- Warmest sea
- Aug · 21.9°
- Sunshine a year
- 1,670 h
- Rain a year
- 1,093 mm
- Climate
- Temperate
- Time zone
- UTC+1 / UTC+2
- Elevation
- 18 m
Climate in Castro Urdiales
Castro Urdiales has a temperate climate with warm summers and cool winters. August is the warmest month with average highs of 27 °C, while January is the coolest at 14 °C. With around 1,670 hours of sunshine a year, Castro Urdiales is moderately sunny; July is the sunniest month with 6.1 hours a day.
Holiday weather through the year
Best time to visit Castro Urdiales
The best time to visit Castro Urdiales is from July to September. For a beach holiday – sea from 21 °C, warm and mostly dry – go in August. For sightseeing, day trips and hiking, conditions are most comfortable from June to September. Rain is frequent from October to May; the wettest month is November with 148 mm.
Castro Urdiales through the seasons
How the weather changes over the seasons, with averages for each.
Castro Urdiales in spring
Mar – May
Poor
- 18–22 °C by day
- Sea 14 °C
- 5.0 h of sun a day
- 44 rainy days in all
Castro Urdiales in summer
Jun – Aug
Good
- 25–27 °C by day
- Sea 20 °C
- 6.0 h of sun a day
- 33 rainy days in all
Castro Urdiales in autumn
Sep – Nov
Poor
- 17–26 °C by day
- Sea 18 °C
- 4.3 h of sun a day
- 42 rainy days in all
Castro Urdiales in winter
Dec – Feb
Poor
- 14–15 °C by day
- Sea 13 °C
- 2.9 h of sun a day
- 45 rainy days in all
Which month for what?
Beach & swimming
Aug
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Jun – Sep
15–28 °C and not too much rain
Rainy months
Oct – May
Rainy season or more than 12 rainy days
Find your perfect month
Tell us what you like and we rate every month in Castro Urdiales 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
Poor
Best time to visit: July – September
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 20°
- Afternoon, 16:00: about 22°
- Evening, 20:00: about 19°
- Night, 23:00: about 16°
08:2519:32
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 08:08–09:04 · evening 18:53–19:49
- Blue hour
- Morning 07:56–08:08 · evening 19:49–20:00
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 Castro Urdiales 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 20° to 17°. The days get 1.4 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 24° | 20° |
| Night-time low | 13° | 10° |
| Sea | 20° | 17° |
| Daylight | 11.8 h | 10.4 h |
What is the weather like in Castro Urdiales in October?
In October, Castro Urdiales is warm: daytime highs average 22 °C, and nights cool down to about 11 °C. The sea averages 18.5 °C – bracing, so a wetsuit helps for longer swims. Expect around 4.3 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 90 mm in total. All in all, October is not an ideal month for a holiday in Castro Urdiales.
More details for October
- Daylight
- 11 h 7 min08:25 – 19:32
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 18 km/haverage daily peakAll months
- Cloud cover
- 62 %on averageAll months
- Hot days
- 1 day30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+2offset from UTC
How the score comes together
- Temperatureweight 35 %57 %
- Seaweight 25 %21 %
- Sunshineweight 20 %22 %
- Few rainy daysweight 20 %36 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- Wetsuit for longer swims
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Compare two months in Castro Urdiales
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 Castro Urdiales: score 72 against 37. In August, days are 5 °C warmer than in October. The sea is 3 °C warmer in August. August has 2 fewer rainy days. The sun shines 2 hours longer a day in August.
| Month | October | August |
|---|---|---|
| Holiday weather score | 37 | 72better |
| Daytime high | 22° | 27° |
| Night-time low | 11° | 16° |
| Sea | 18.5° | 21.9° |
| Sunshine | 4.3 h | 6.0 hbetter |
| Rainy days | 13 | 11better |
| Rainfall | 90 mm | 55 mmbetter |
| Muggy days | 0better | 5 |
Based on the climate averages 1996–2025.
Castro Urdiales month by month
The typical weather for every month at a glance.
3January14° · Sea 13° · 2.7 h
In January, Castro Urdiales is cool: daytime highs average 14 °C, and nights cool down to about 5 °C. The sea averages 13.2 °C – swimming is only for the hardy. The sun is scarce, with only about 2.7 hours a day. It rains often – on about 16 days, adding up to 118 mm. All in all, January is not an ideal month for a holiday in Castro Urdiales.
Castro Urdiales in January7February15° · Sea 13° · 3.5 h
In February, Castro Urdiales is cool: daytime highs average 15 °C, and nights cool down to about 5 °C. The sea averages 12.6 °C – swimming is only for the hardy. The sun is scarce, with only about 3.5 hours a day. It rains often – on about 14 days, adding up to 104 mm. All in all, February is not an ideal month for a holiday in Castro Urdiales.
Castro Urdiales in February10March18° · Sea 13° · 4.4 h
In March, Castro Urdiales is mild: daytime highs average 18 °C, and nights cool down to about 7 °C. The sea averages 12.7 °C – swimming is only for the hardy. Expect around 4.4 hours of sunshine a day. It rains often – on about 14 days, adding up to 97 mm. All in all, March is not an ideal month for a holiday in Castro Urdiales.
Castro Urdiales in March13April19° · Sea 14° · 5.0 h
In April, Castro Urdiales is mild: daytime highs average 19 °C, and nights cool down to about 8 °C. The sea averages 13.6 °C – swimming is only for the hardy. Expect around 5.0 hours of sunshine a day. It rains often – on about 15 days, adding up to 90 mm. All in all, April is not an ideal month for a holiday in Castro Urdiales.
Castro Urdiales in April32May22° · Sea 15° · 5.7 h
In May, Castro Urdiales is warm: daytime highs average 22 °C, and nights cool down to about 11 °C. The sea averages 15.4 °C – swimming is only for the hardy. Expect around 5.7 hours of sunshine a day. It rains often – on about 15 days, adding up to 83 mm. All in all, May is not an ideal month for a holiday in Castro Urdiales.
Castro Urdiales in May58June25° · Sea 18° · 6.0 h
In June, Castro Urdiales is warm: daytime highs average 25 °C, and nights cool down to about 14 °C. The sea averages 18.4 °C – bracing, so a wetsuit helps for longer swims. Expect around 6.0 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 72 mm in total. All in all, June is a so-so month for a holiday in Castro Urdiales.
Castro Urdiales in June70July27° · Sea 21° · 6.1 h
In July, Castro Urdiales is warm: daytime highs average 27 °C, and nights cool down to about 16 °C. The sea averages 20.8 °C – refreshing for a swim. Expect around 6.1 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 57 mm in total. All in all, July is a good month for a holiday in Castro Urdiales.
Castro Urdiales in July72August27° · Sea 22° · 6.0 h
In August, Castro Urdiales is hot: daytime highs average 27 °C, and nights cool down to about 16 °C. The sea averages 21.9 °C – refreshing for a swim. Expect around 6.0 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 55 mm in total. On about 6 days the thermometer climbs to 30 °C or more. All in all, August is a good month for a holiday in Castro Urdiales.
Castro Urdiales in August65September26° · Sea 21° · 5.5 h
In September, Castro Urdiales is warm: daytime highs average 26 °C, and nights cool down to about 14 °C. The sea averages 20.7 °C – refreshing for a swim. Expect around 5.5 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 70 mm in total. All in all, September is a good month for a holiday in Castro Urdiales.
Castro Urdiales in September37October22° · Sea 19° · 4.3 h
In October, Castro Urdiales is warm: daytime highs average 22 °C, and nights cool down to about 11 °C. The sea averages 18.5 °C – bracing, so a wetsuit helps for longer swims. Expect around 4.3 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 90 mm in total. All in all, October is not an ideal month for a holiday in Castro Urdiales.
Castro Urdiales in October2November17° · Sea 16° · 3.0 h
In November, Castro Urdiales is mild: daytime highs average 17 °C, and nights cool down to about 8 °C. The sea averages 16.1 °C – swimming is only for the hardy. The sun is scarce, with only about 3.0 hours a day. It rains often – on about 17 days, adding up to 148 mm. All in all, November is not an ideal month for a holiday in Castro Urdiales.
Castro Urdiales in November4December15° · Sea 14° · 2.6 h
In December, Castro Urdiales is cool: daytime highs average 15 °C, and nights cool down to about 6 °C. The sea averages 14.3 °C – swimming is only for the hardy. The sun is scarce, with only about 2.6 hours a day. It rains often – on about 15 days, adding up to 107 mm. All in all, December is not an ideal month for a holiday in Castro Urdiales.
Castro Urdiales in DecemberClimate in detail
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Castro Urdiales
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 11°. A duvet at night and a jumper for the evening.
The coolest nights are in February (5°), the warmest in August (16°). 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 | 3 | 14° | 5° | 13.2° | 2.7 h | 16 | 118 |
| FebruaryFeb | 7 | 15° | 5° | 12.6° | 3.5 h | 14 | 104 |
| MarchMar | 10 | 18° | 7° | 12.7° | 4.4 h | 14 | 97 |
| AprilApr | 13 | 19° | 8° | 13.6° | 5.0 h | 15 | 90 |
| MayMay | 32 | 22° | 11° | 15.4° | 5.7 h | 15 | 83 |
| JuneJun | 58 | 25° | 14° | 18.4° | 6.0 h | 12 | 72 |
| JulyJul | 70 | 27° | 16° | 20.8° | 6.1 h | 10 | 57 |
| AugustAug | 72 | 27° | 16° | 21.9° | 6.0 h | 11 | 55 |
| SeptemberSep | 65 | 26° | 14° | 20.7° | 5.5 h | 12 | 70 |
| OctoberOct | 37 | 22° | 11° | 18.5° | 4.3 h | 13 | 90 |
| NovemberNov | 2 | 17° | 8° | 16.1° | 3.0 h | 17 | 148 |
| DecemberDec | 4 | 15° | 6° | 14.3° | 2.6 h | 15 | 107 |
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
43.38° N, 3.22° W · 18 m · Europe/Madrid
Sea temperature in Castro Urdiales
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 17.6 – 19.5 °C
Swimming season: Jul – Sep
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Castro Urdiales ranges from 12.6 °C in February to 21.9 °C in August. It is warm enough for a comfortable swim (20 °C and more) from July to September.
The sea temperature varies from year to year: in August, eight out of ten years were between 21.0 and 22.7 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 13.2° | 12.6° | 14.1° | cold |
| FebruaryFeb | 12.6° | 12.1° | 13.2° | cold |
| MarchMar | 12.7° | 12.1° | 13.3° | cold |
| AprilApr | 13.6° | 13.0° | 14.3° | cold |
| MayMay | 15.4° | 14.7° | 16.4° | cold |
| JuneJun | 18.4° | 17.3° | 19.5° | fresh |
| JulyJul | 20.8° | 19.7° | 22.0° | refreshing |
| AugustAug | 21.9° | 21.0° | 22.7° | refreshing |
| SeptemberSep | 20.7° | 19.8° | 21.4° | refreshing |
| OctoberOct | 18.5° | 17.6° | 19.5° | fresh |
| NovemberNov | 16.1° | 15.2° | 17.0° | cold |
| DecemberDec | 14.3° | 13.6° | 15.0° | cold |
Sunshine hours in Castro Urdiales
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 4.3 of 11.1 hours of daylight in Castro Urdiales, 39 % 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 in Castro Urdiales: 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, Castro Urdiales has about 13 rainy days with 90 mm of rain in total.
UV index in Castro Urdiales
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 3 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 9).
Minutes until sunburn in October
- Very fair skin
- about 40 min
- Fair skin
- about 50 min
- Light brown skin
- about 70 min
- Olive skin
- about 90 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 and clouds in Castro Urdiales
How breezy and how cloudy Castro Urdiales 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 Castro Urdiales typically peaks at 18 km/h during the day: Beaufort 3, gentle 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: Nov – Jan.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 62 % of the sky over Castro Urdiales: variable cloud, with about 4.3 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 and humidity in Castro Urdiales
How often the day gets hot in Castro Urdiales (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, Castro Urdiales has about 1 hot day, 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 Castro Urdiales
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Castro Urdiales 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.
Castro Urdiales has its best school-holiday weather during the summer holidays (score 71) and its weakest during the Christmas holidays (score 4).
- 12
Easter holidays
Mar – Apr
Poor
- 19 °C by day
- Sea 13 °C
- 4.8 h of sun a day
- 15 rainy days a month
Keep in mind: Frequent rain
- 37
May half-term
May – Jun
Poor
- 23 °C by day
- Sea 16 °C
- 5.8 h of sun a day
- 14 rainy days a month
Keep in mind: Frequent rain
- 71
Summer holidays
Jul – Aug
GoodBest holidays
- 27 °C by day
- Sea 22 °C
- 6.0 h of sun a day
- 11 rainy days a month
Good for: Sightseeing & walks
- 37
October half-term
Oct
Poor
- 22 °C by day
- Sea 19 °C
- 4.3 h of sun a day
- 13 rainy days a month
Keep in mind: Frequent rain
- 4
Christmas holidays
Dec – Jan
Poor
- 15 °C by day
- Sea 14 °C
- 2.7 h of sun a day
- 15 rainy days a month
Keep in mind: Frequent rain
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 1 h 35 min
- Distance
- 920 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.
Compare & alternatives
Castro Urdiales compared
Put Castro Urdiales side by side with another destination.
Castro Urdiales vs Bilbao
In October the holiday weather in Castro Urdiales and Bilbao is about equally good (score 37 vs 40). During the day it is about as warm in Bilbao as in Castro Urdiales.
| in October | Castro Urdiales | Bilbao |
|---|---|---|
| Holiday weather score | 37 | 40 |
| Daytime high | 22° | 22° |
| Sea | 19° | no sea nearby |
| Sunshine | 4 h | 4 h |
| Rainy days | 13 | 13 |
| Best time | Jul – Sep | Apr – Oct |
Through the year
Spain in October: the best places
In October, Castro Urdiales ranks 23 among the 31 nearest destinations in this country.
- Zaragoza22°88
- 2Huesca21°84
- 3Valladolid20°82
- 4Soria18°81
- 5Tordesillas20°81
- 6Pamplona20°79
- 7Zamora20°79
- 8Logroño21°78
- 23Castro UrdialesThis page22°19°37
Near Castro Urdiales
Other destinations close by.
Places with a climate like Castro Urdiales
Destinations whose weather through the year is closest to Castro Urdiales's – good alternatives.
Frequently asked questions about Castro Urdiales
When is the best time to visit Castro Urdiales?
The best time to visit Castro Urdiales is from July to September. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Castro Urdiales?
The sea temperature in Castro Urdiales ranges from 12.6 °C in February to 21.9 °C in August. It is warm enough for a comfortable swim (20 °C and more) from July to September.
Can you swim in Castro Urdiales in October?
Only if you don't mind cold water: in October the sea averages just 18.5 °C. Comfortable swimming is possible from July to September.
What is the warmest month in Castro Urdiales?
August is the warmest month, with average highs of 27 °C and nights around 16 °C. January is the coolest month at 14 °C.
When does it rain most in Castro Urdiales?
Rain is frequent from October to May; the wettest month is November with 148 mm. The driest month is August with 55 mm.
How many hours of sunshine does Castro Urdiales get?
Castro Urdiales gets around 1,670 hours of sunshine a year. The sunniest month is July with 6.1 hours a day; in December there are 2.6 hours a day.
What time zone is Castro Urdiales in?
Castro Urdiales is on UTC+1 in January and UTC+2 in July.
How long is the flight from London to Castro Urdiales?
A nonstop flight from London to Castro Urdiales takes about 1 h 35 min, for a straight-line distance of about 920 km.
Which school holidays are best for Castro Urdiales?
Castro Urdiales has its best school-holiday weather during the summer holidays (score 71) and its weakest during the Christmas holidays (score 4). Holiday ratings (0–100): Easter holidays 12, May half-term 37, summer holidays 71, October half-term 37, Christmas holidays 4.