What is the weather like in San Sebastian in August?

Expect temperatures between 17°C and 24°C with 29% average rain probability and about 8 hours of sunshine daily.

What is the weather like in San Sebastian in August?

San Sebastian in August scores 64/100 based on 30 years of climate data. Worthwhile timing with some trade-offs.

Who should visit San Sebastian in August?

August in San Sebastian is ideal for: Cultural tourists, Business travelers, Adventure seekers.

San Sebastian Weather in August | 30-Year Forecast

Avg High

24°C

Hottest around day 10

Avg Low

17°C

Coolest around day 31

Rainy Days

21days

29% avg rain chance

Sunshine

8hrs/day

Summer season

Sea Temperature in August

Bay of Biscay(Golfo de Vizcaya)

23.3°C

Monthly Average

Water Feel

☀️Warm

Perfect for swimming and water sports

Swim Rating

✅Excellent for swimming

Based on average sea surface temperature

Body of Water

Bay of Biscay

Golfo de Vizcaya

San Sebastian coastline

Essential Travel Info for San Sebastian

🗓️ Best Time to Visit 📖 Travel Guide 🍴 Food Guide

Currency

EUR

€ Euro

Language

Spanish

+3 more

Driving

Right side

Safety

High Safety

GPI: 1.603

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

Remote

12/ 100

Traffic Index

Off the beaten path

Peak Daily Arrivals

slots per day

Peak

Jun

Low

Apr

Monthly Traffic Distribution

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Traffic Level

Low Season

Key Connections

Madrid Adolfo Suárez –Barajas (MAD)

Barcelona (BCN)

Gran Canaria Island Gran Canaria (LPA)

Seville Sevilla (SVQ)

Tenerife Island Tenerife Norte (TFN)

Health & Safety Advisory

CDC travel health recommendations

7 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.

+1 more

Source: CDC Travelers' Health

View Complete Health Guide

Is August a Good Time to Visit San Sebastian?

👌Worthwhile timing with some trade-offs(64/100)

Short Answer

Beach lovers rejoice: San Sebastian's August features 23.3°C sea temperatures alongside 24°C air temps. Just 29% rain risk makes this prime swimming season.

Decision Factors

Vaccinations required

Yellow Fever

Very high humidity

81% average humidity

Peak tourist season

87% of annual peak - expect crowds and high prices

Ideal temperature range

23.9°C - perfect for sightseeing and outdoor activities

Pleasant swimming conditions

23.3°C sea temperature

Health precautions needed

Be aware of: Leptospirosis, Leishmaniasis, Hantavirus

Good For

🏛️
Cultural tourists
Comfortable conditions for exploring museums and sites
💼
Business travelers
Climate-controlled meetings unaffected by weather
🎯
Adventure seekers
1.12m waves - good for surfing and water sports

Who Should Avoid

💰
Budget travelers
Peak season means premium prices everywhere
👴
Elderly travelers
81% humidity creates difficult conditions

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,San Sebastian in August averages 24°C with 29% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: San Sebastian in August

What are the temperatures in San Sebastian in August?

Daytime highs average 24°C, nights drop to 17°C. Temperatures remain fairly consistent.

How many rainy days in San Sebastian in August?

Expect around 21 days with measurable rainfall. Rain is unlikely to disrupt plans.

What to wear in San Sebastian in August?

Comfortable casual wear with a light jacket for evenings.

Is August peak season in San Sebastian?

This is shoulder season—moderate prices and manageable crowds.

San Sebastian Weather in August