Spain

San Sebastian Weather

San Sebastian weather today, the 14-day forecast, and average temperature, rain and what to wear for every month — compared against Hong Kong. Best months to visit: Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov and Dec.

San Sebastian now (local time 08:30)

22°C

Clear

Feels like: 23°
Humidity: 90%
Wind: 16 km/h

Next 7 days · what to wear

20° – 30°C

Mostly dry all week

👕 Short sleeves, plus a light layer for air-conditioned interiors.

San Sebastian 14-day forecast

Today
10/4
⛅
29°
21°
💧0%
Mon
10/5
☁️
30°
22°
💧0%
Tue
10/6
🌦️
30°
22°
💧2%
Wed
10/7
🌦️
28°
23°
💧2%
Thu
10/8
🌦️
28°
21°
💧4%
Fri
10/9
🌤️
27°
20°
💧4%
Sat
10/10
🌦️
26°
20°
💧4%
Sun
10/11
🌦️
26°
20°
💧6%
Mon
10/12
🌦️
25°
19°
💧4%
Tue
10/13
🌦️
26°
20°
💧2%
Wed
10/14
⛅
29°
21°
💧0%
Thu
10/15
🌤️
29°
21°
💧2%
Fri
10/16
🌦️
28°
22°
💧4%
Sat
10/17
🌦️
28°
21°
💧1%

Best time to visit San Sebastian

On temperature and rainfall, the most comfortable months in San Sebastian are Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov and Dec. The hottest month is September (average high 26°C) and the coldest is February (average low 18°C).

Jan20°18°Feb20°18°Mar20°18°Apr21°18°May22°19°Jun23°21°Jul25°22°Aug25°23°Sep26°23°Oct25°23°Nov23°21°Dec21°19°

San Sebastian climate by month

Month	Avg high	Avg low	Rain	Humidity	vs Hong Kong
JanBest	20°C	18°C	25 mm	72%	+2°C
FebBest	20°C	18°C	24 mm	74%	+1°C
MarBest	20°C	18°C	19 mm	75%	-1°C
AprBest	21°C	18°C	12 mm	74%	-4°C
MayBest	22°C	19°C	7 mm	75%	-6°C
JunBest	23°C	21°C	3 mm	77%	-7°C
JulBest	25°C	22°C	2 mm	80%	-6°C
AugBest	25°C	23°C	5 mm	80%	-5°C
SepBest	26°C	23°C	10 mm	77%	-4°C
OctBest	25°C	23°C	25 mm	75%	-2°C
NovBest	23°C	21°C	33 mm	73%	-1°C
DecBest	21°C	19°C	37 mm	73%	+2°C

Data: NASA POWER 2001–2020 climatology (MERRA-2, elevation-corrected); Hong Kong comparison uses HKO 1991–2020 normals.

San Sebastian weather month by month: what to wear

San Sebastian in OctoberBest monthThis month

October in San Sebastian is pleasantly warm: average highs of 25°C and lows of 23°C, around 25 mm of rain (dry) and 75% humidity — about 2°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.

👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings.

San Sebastian in NovemberBest month

November in San Sebastian is pleasantly warm: average highs of 23°C and lows of 21°C, around 33 mm of rain (mostly dry) and 73% humidity — about the same as Hong Kong. It's one of the most comfortable months of the year to visit.

👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings.

San Sebastian in DecemberBest month

December in San Sebastian is pleasantly warm: average highs of 21°C and lows of 19°C, around 37 mm of rain (mostly dry) and 73% humidity — about 2°C warmer than Hong Kong. It's one of the most comfortable months of the year to visit.

👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings.

San Sebastian in JanuaryBest month

January in San Sebastian is mild and cool: average highs of 20°C and lows of 18°C, around 25 mm of rain (dry) and 72% humidity — about 2°C warmer than Hong Kong. It's one of the most comfortable months of the year to visit.

👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings.

San Sebastian in FebruaryBest month

February in San Sebastian is mild and cool: average highs of 20°C and lows of 18°C, around 24 mm of rain (dry) and 74% humidity — about the same as Hong Kong. It's one of the most comfortable months of the year to visit.

👕 Long sleeves with a light jacket or sweater.

San Sebastian in MarchBest month

March in San Sebastian is mild and cool: average highs of 20°C and lows of 18°C, around 19 mm of rain (dry) and 75% humidity — about the same as Hong Kong. It's one of the most comfortable months of the year to visit.

👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings.

San Sebastian in AprilBest month

April in San Sebastian is mild and cool: average highs of 21°C and lows of 18°C, around 12 mm of rain (dry) and 74% humidity — about 4°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.

👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings.

San Sebastian in MayBest month

May in San Sebastian is pleasantly warm: average highs of 22°C and lows of 19°C, around 7 mm of rain (dry) and 75% humidity — about 6°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.

👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings.

San Sebastian in JuneBest month

June in San Sebastian is pleasantly warm: average highs of 23°C and lows of 21°C, around 3 mm of rain (dry) and 77% humidity — about 7°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.

👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings.

San Sebastian in JulyBest month

July in San Sebastian is pleasantly warm: average highs of 25°C and lows of 22°C, around 2 mm of rain (dry) and 80% humidity — about 6°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.

👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings.

San Sebastian in AugustBest month

August in San Sebastian is pleasantly warm: average highs of 25°C and lows of 23°C, around 5 mm of rain (dry) and 80% humidity — about 5°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.

👕 Short sleeves, plus a light layer for air-conditioned interiors.

San Sebastian in SeptemberBest month

September in San Sebastian is pleasantly warm: average highs of 26°C and lows of 23°C, around 10 mm of rain (dry) and 77% humidity — about 4°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.

👕 Short sleeves, plus a light layer for air-conditioned interiors.

FAQ

›What is the best time to visit San Sebastian?

On temperature and rainfall, the most comfortable months in San Sebastian are Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov and Dec. The hottest month is September (average high 26°C) and the coldest is February (average low 18°C).

›What's the weather like in San Sebastian in October, and what should I wear?

October in San Sebastian is pleasantly warm: average highs of 25°C and lows of 23°C, around 25 mm of rain (dry) and 75% humidity — about 2°C colder than Hong Kong. It's one of the most comfortable months of the year to visit. What to wear: Short sleeves with a light long-sleeve or jacket for cool mornings and evenings.

›What's the weather like in San Sebastian in November, and what should I wear?

November in San Sebastian is pleasantly warm: average highs of 23°C and lows of 21°C, around 33 mm of rain (mostly dry) and 73% humidity — about the same as Hong Kong. It's one of the most comfortable months of the year to visit. What to wear: Short sleeves with a light long-sleeve or jacket for cool mornings and evenings.

›When is the rainy season in San Sebastian?

San Sebastian is wettest in December, with about 37 mm on average, and driest in July, with about 2 mm.

›How cold does San Sebastian get? Does it snow?

The coldest month is February, averaging 20°C by day and 18°C at night. Snow is very unlikely.

Planning a trip to San Sebastian?

More Spain weather

Barcelona●14–23°Madrid●9–21°Seville●14–26°Valencia●15–26°Granada●13–22°Malaga●19–22°Bilbao●16–20°

Popular destinations in October

Tokyo●14–22°Osaka●14–23°Fukuoka●16–23°Sapporo●7–16°Okinawa (Naha)●24–28°Kyoto●13–22°Nagoya●14–23°Seoul●9–19°Busan●13–21°Jeju Island●16–21°Taipei22–27°Taichung●22–30°

Forecast data: Open-Meteo.com (CC BY 4.0), refreshed every 3 hours. Hottest month: September; coldest: February.