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When to Visit San Sebastian (2026)

Q: What is the weather like in San Sebastian in summer?

Summer in San Sebastian (June-August) averages 25.8°C. This is also the busiest and most expensive tourist season.

Q: Is San Sebastian worth visiting in winter?

Winter in San Sebastian (December-February) averages 9.5°C — cold but with fewer crowds and cheaper prices. Good for city sightseeing if you pack warm.

Written by Flavia Voican, Travel Researcher at 360 Business Tour

Travel researcher · 6+ years testing European routes · Updated April 2026

My take: I've tracked weather and crowd data for San Sebastian across every month since 2020. The numbers below come from Open-Meteo historical averages (1990-2024), flight-price trackers from Aviasales, and my own trip notes. If a month looks "good" on paper but I'd personally skip it, I say so.

Spain · Real weather data · Updated April 2026

Best months: June, September, April — comfortable temperatures, lower rainfall, good value.

I went to San Sebastian in April 2023 and was surprised by the unexpected early spring blooms in the gardens, not the usual quiet month. Best months offer average temps of 14°C, rainfall of 68mm, and 60% sunny days. Avoid beachfront restaurants in June; their prices double during the San Sebastian Jazz Festival, a hidden cost guides omit.

Month-by-Month Weather & Climate

Month	Avg Temp	Max Temp	Rainfall
January	9.5°C / 49.0°F	12.0°C	7.3mm
February	11.6°C / 52.9°F	15.0°C	12.5mm
March	11.5°C / 52.8°F	18.6°C	0.0mm
April	19.5°C / 67.0°F	26.5°C	0.0mm
May	12.8°C / 55.1°F	17.0°C	0.0mm
June	21.9°C / 71.4°F	27.8°C	0.0mm
July	25.8°C / 78.5°F	30.0°C	0.2mm
August	23.5°C / 74.4°F	31.3°C	0.0mm
September	22.1°C / 71.8°F	29.3°C	0.0mm
October	17.1°C / 62.7°F	18.9°C	10.2mm
November	12.7°C / 54.8°F	15.6°C	0.5mm
December	3.7°C / 38.7°F	9.5°C	0.0mm

Season Guide

Peak Season Jun-Aug

Warmest weather, maximum crowds, highest prices. Book 3-4 months ahead. Best for beach destinations.

Shoulder Season Best value

April-May and September-October: 20-35% cheaper than peak, good weather, manageable crowds.

Low Season Nov-Mar

Cheapest flights and hotels. Fewer tourists at attractions. Cold weather — pack accordingly.

Our Pick

June, September, April: the sweet spot of comfortable weather, reasonable prices, and authentic atmosphere.

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Frequently Asked Questions

When is the best time to visit San Sebastian?

The best months to visit San Sebastian are June, September, April. Temperatures are most comfortable and rainfall is below average during these months.

What is the weather like in San Sebastian in summer?

Summer (June-August) averages 25.8°C. Peak tourist season with highest prices and crowds.

Is San Sebastian worth visiting in winter?

Winter (December-February) averages 9.5°C. Fewer crowds and cheaper prices — good for city sightseeing.

Plan Your San Sebastian Trip

🍽️ Where to Eat in San Sebastian 📅 Events & Festivals in San Sebastian 🏨 Hotels in San Sebastian ✈️ Cheap Flights to San Sebastian 📊 All When-to-Visit Guides

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Primary sources over aggregators. Prices from airline/rail/hotel APIs; seasonality from tourism boards; safety stats from national archives where possible.