Peak in August
Coolest in January
Heavy in November
Peak in dry season
Sea Temperature
Bay of Biscay(Golfo de Vizcaya)
Annual Average
Consider a wetsuit for extended swimming
Based on average sea surface temperature
Golfo de Vizcaya
San Sebastian coastline
San Sebastian Monthly Weather Guide
Click any month to explore daily weather forecasts
January
February
March
April
May
June
July
August
September
October
November
December
Essential Travel Info for San Sebastian
Currency
EUR
€ Euro
Language
Spanish
+3 more
Driving
Right side
Safety
High Safety
GPI: 1.603
Best Time to Visit San Sebastian
Location, climate overview & historical trends
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📍 43.3183° N, 1.9812° W
Open in Google MapsSan Sebastian is a prominent destination in Spain.
Located at 43.32°N latitude,San Sebastian experiences a temperate climate with four distinct seasons.
Based on 30 years of data, August is the warmest month (avg. 24°C), while January is the coolest. November sees the most rain (46% chance), making July the driest month.
Historical Climate Trend
30-Year Analysis+2.35°C
Total over 30 years
+0.78°C
Per decade
Linear regression analysis of historical maximum temperatures for San Sebastian, based on 1995-2024 satellite data from NASA POWER.
Best Time to Visit
NASA POWER Data (1991-2021)June, July, August
Best months to visit
18°C
Avg High
Based on 30 years of NASA satellite data,San Sebastian receives approximately 1,051mm of rainfall annually. These months offer optimal temperatures and minimal rain probability for your visit.
Climate Trends
EXCLUSIVE1995-2040 Temperature Trend
1995 Avg
16.9°
2024 Avg
19°
2040 Proj
19.4°
+0.78°C
per decade (observed)
+0.23°C
per decade (CMIP6)
🌡️ San Sebastian has warmed by +2.4°C since 1995. By 2040, an additional +0.4°C is projected (based on CMIP6 rate of 0.232°C/decade), for a total of +2.7°C from 1995 baseline.
NASA POWER (1995-2024) + CMIP6 (CMCC_CM2_VHR4, EC_Earth3P_HR, FGOALS_f3_H, HiRAM_SIT_HR, MRI_AGCM3_2_S, NICAM16_8S)
Travel Intelligence
Exclusive flight analytics & health data for San Sebastian
Smart Flight Estimator
Airport-to-Airport Logistics
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Flight Connectivity Analysis
Airport traffic data & seasonal patterns
Off the beaten path
0
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Peak
Jun
Low
Apr
Monthly Traffic Distribution
Key Connections
Health & Safety Advisory
CDC travel health recommendations
COVID-19
All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.
Hepatitis A
Consider hepatitis A vaccination for most travelers. It is recommended for travelers who will be doing higher risk activities, such as visiting smaller cities, villages, or rural areas where a traveler might get infected through food or water. It is recommended for travelers who plan on eating street food.
Hepatitis B
Recommended for unvaccinated travelers younger than 60 years old traveling to Spain. Unvaccinated travelers 60 years and older may get vaccinated before traveling to Spain.
Measles
Cases of measles are on the rise worldwide. Travelers are at risk of measles if they have not been fully vaccinated at least two weeks prior to departure, or have not had measles in the past, and travel internationally to areas where measles is spreading.All international travelers should be fully vaccinated against measles with the measles-mumps-rubella (MMR) vaccine, including an early dose for infants 6–11 months, according toCDC’s measles vaccination recommendations for international travel.
Polio
In Spain poliovirus has been identified in the past year.Travelers to Spain are at increased risk of exposure to poliovirus.Vaccine recommendations: Adults traveling to Spain who received a complete polio vaccination series as children may receive a single lifetime booster dose of inactivated polio vaccine; travelers who are unvaccinated or not fully vaccinated should receive a complete polio vaccination series before travel. Children who are not fully vaccinated will be considered for anaccelerated vaccination schedule.
Rabies
Dogs infected with rabies are not commonly found in Spain.If rabies exposures occur while in Spain, rabies vaccines are typically available throughout most of the country.Rabies pre-exposure vaccination considerations include whether travelers 1) will be performing occupational or recreational activities that increase risk for exposure to potentially rabid animals and 2) might have difficulty getting prompt access to safe post-exposure prophylaxis.Please consult with a healthcare provider to determine whether you should receive pre-exposure vaccination before travel.For more information, seecountry rabies status assessments.
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Source: CDC Travelers' Health
View Complete Health GuideSan Sebastian Climate Data by Month
Historical temperature and precipitation averages
| Month | Avg High (°C) | Rain Probability (%) | Status |
|---|---|---|---|
| January | 12°C | 40% | Neutral |
| February | 13°C | 39% | Neutral |
| March | 14°C | 38% | Neutral |
| April | 16°C | 40% | Neutral |
| May | 19°C | 38% | Neutral |
| June | 22°C | 31% | 😊 Pleasant |
| July | 23°C | 27% | 😊 Pleasant |
| August | 24°C | 29% | 😊 Pleasant |
| September | 22°C | 32% | 😊 Pleasant |
| October | 20°C | 32% | 😊 Pleasant |
| November | 15°C | 46% | 🌧️ Rainy |
| December | 13°C | 39% | Neutral |
Weather in Cities Near San Sebastian
Explore climate data for popular destinations within easy reach
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Compare weather conditions with nearby destinations for your trip planning
Compare San Sebastian Weather vs Popular Destinations
Similar Climate Destinations
Discover destinations with weather similar to San Sebastian
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These destinations share similar weather patterns with San Sebastian. Perfect alternatives if you're looking for the same climate in a different location.
San Sebastian Weather FAQ
When is the best time to visit San Sebastian?
Honestly, look for months with mild temperatures (20°C-25°C) and low rain chance. Based on historical data, June, July, August are usually great choices.
When is the hottest month in San Sebastian?
August is historically the hottest month in San Sebastian with average highs of 24°C.
When does it rain the most in San Sebastian?
November typically sees the highest probability of rain (46%).
Is San Sebastian expensive?
Prices vary by season. The "Perfect" weather months usually coincide with peak tourist season and higher prices, while the rainy or cold months offer better deals.