What is the weather like in San Sebastian throughout the year?

San Sebastian experiences varying weather throughout the year. The warmest month is August with average highs of 24°C. The coolest month is January.

What is the weather like in San Sebastian in September?

San Sebastian in September scores 65/100 based on 30 years of climate data. Very good conditions overall.

Who should visit San Sebastian in September?

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

Best Time to Visit San Sebastian | 30-Year Weather Analysis

Why September is the Best Time to Visit San Sebastian

Is September a Good Time to Visit San Sebastian?

👍Very good conditions overall(65/100)

Short Answer

Ideal beach conditions in San Sebastian during September: 21.9°C turquoise waters, 22°C air, 32% rain. 1.2m calm waves suit families and swimmers alike.

Decision Factors

Vaccinations required

Yellow Fever

Peak tourist season

97% of annual peak - expect crowds and peak prices

Ideal temperature range

22.2°C - perfect for sightseeing and outdoor activities

Health precautions needed

Be aware of: Leptospirosis, Leishmaniasis, Hantavirus

Plenty of sunshine

9.5h of sunshine daily

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
1.23m waves - good for surfing and water sports

Who Should Avoid

💰
Budget travelers
Peak season means premium prices everywhere
👴
Elderly travelers
79% humidity creates difficult conditions

Warmest

August

24°C avg

Coolest

January

12°C avg

Driest

July

27% rain

Wettest

November

46% rain

Planning Your Trip to San Sebastian, Spain

Wondering when is the best time to visit San Sebastian? Based on our analysis of 30 years of NASA satellite weather data, the ideal months to travel to San Sebastian are September, October, May. During these months, you'll experience optimal temperatures around 22°C with only 32% chance of rain.

The San Sebastian climate varies throughout the year. August is the hottest month with average highs of 24°C, while January is the coldest at 12°C. If you're planning outdoor activities or sightseeing in San Sebastian, avoid November when rainfall peaks at 46% probability.

For the best San Sebastian weather experience, we recommend visiting during July for the driest conditions or the shoulder months of September and October for a perfect balance of weather and fewer crowds.

San Sebastian Weather by Month: Climate Guide

Click any month to explore detailed daily forecasts for San Sebastian

🏆 85-100: Excellent👍 70-84: Great👌 55-69: Good🤔 40-54: Fair⚠️ 0-39: Challenging

When to Visit San Sebastian: Travel Style Guide

Personalized San Sebastian travel recommendations based on 30-year weather data

Budget Travelers

Shoulder season with good weather and lower prices

AprilMayJune

Avoiding Crowds

Fewer tourists with acceptable weather conditions

JanuaryFebruaryMarch

Photography

Best light conditions with clear skies

JulyAugustJune

Honeymoon

Perfect conditions for a romantic getaway

MayJuneJuly

San Sebastian Weather FAQ: Your Questions Answered

What is the best time to visit San Sebastian?

Based on 30 years of weather data, the best months to visit San Sebastian are September, October, May. These months offer the optimal combination of pleasant temperatures (22°C avg) and low rainfall (32% chance).

When is the hottest time of year in San Sebastian?

August is historically the warmest month in San Sebastian with average highs of 24°C. If you prefer cooler weather, consider visiting in January when temperatures average around 12°C.

When is the rainy season in San Sebastian?

November typically sees the most rainfall in San Sebastian with a 46% chance of rain. For the driest conditions, plan your visit in July when rain probability drops to just 27%.

How accurate is the San Sebastian weather forecast?

Our San Sebastian climate analysis is based on 30 years of NASA POWER satellite observations (1995-2024), providing highly accurate historical averages. While weather can vary year to year, these long-term patterns are excellent indicators for planning your trip to San Sebastian.

What should I pack for San Sebastian?

Packing depends on when you visit. In August (warmest month), pack light summer clothes for 24°C weather. In January (coolest month), bring layers for 12°C temperatures. During November, pack rain gear as there's a 46% chance of rain.

Is San Sebastian good for a destination wedding?

Yes! The best months for an outdoor wedding in San Sebastian are July (only 27% rain chance) and September for optimal weather conditions. Avoid November when rain probability peaks at 46%.