What is the weather like in San Sebastian in December?

Expect temperatures between 8°C and 13°C with 39% average rain probability and about 8 hours of sunshine daily.

What is the weather like in San Sebastian in December?

San Sebastian in December scores 63/100 based on 30 years of climate data. Worthwhile timing with some trade-offs.

Who should visit San Sebastian in December?

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

San Sebastian Weather in December | 30-Year Forecast

Avg High

13°C

Hottest around day 23

Avg Low

8°C

Coolest around day 15

Rainy Days

31days

39% avg rain chance

Sunshine

8hrs/day

Winter season

Sea Temperature in December

Bay of Biscay(Golfo de Vizcaya)

15°C

Monthly Average

Water Feel

💧Refreshing

Consider a wetsuit for extended swimming

Swim Rating

🏄Cool, wetsuits recommended

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 December a Good Time to Visit San Sebastian?

👌Worthwhile timing with some trade-offs(63/100)

Short Answer

San Sebastian in December features 15°C seas - too cold for swimming but stunning for coastal walks. Air temperatures average 13°C with 39% rain probability.

Decision Factors

Vaccinations required

Yellow Fever

Rough sea conditions

1.85m average wave height - Surfers Only

Cold sea - swimming challenging

15°C sea temperature - Polar Plunge

Health precautions needed

Be aware of: Leptospirosis, Leishmaniasis, Hantavirus

Shoulder season - balanced conditions

83% of peak - good value with moderate crowds

Exceptional dining scene

38 Michelin-listed restaurants

Good For

🏛️
Cultural tourists
Comfortable conditions for exploring museums and sites
💼
Business travelers
Climate-controlled meetings unaffected by weather
🎯
Adventure seekers
1.85m waves - good for surfing and water sports

Who Should Avoid

🏖️
Beach lovers
Sea temperature only 15°C - too cold for comfortable swimming
👴
Elderly travelers
79% humidity creates difficult conditions

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,San Sebastian in December averages 13°C with 39% precipitation probability."

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

Frequently Asked Questions: San Sebastian in December

What are the temperatures in San Sebastian in December?

Daytime highs average 13°C, nights drop to 8°C. Temperatures remain fairly consistent.

How many rainy days in San Sebastian in December?

Expect around 31 days with measurable rainfall. An umbrella is advisable.

What to wear in San Sebastian in December?

Layers are key. A medium-weight jacket and closed-toe shoes.

Is December peak season in San Sebastian?

This is shoulder season—moderate prices and manageable crowds.

San Sebastian Weather in December