San Sebastián - When to Visit

When to Visit San Sebastián

Climate guide & best times to travel

Monthly Climate Data for San Sebastián Average temperature and rainfall by month Climate Overview 0°C 7°C 15°C 22°C 30°C Rainfall (mm) 0 113 226 Jan Jan: 13.0°C high, 5.0°C low, 173mm rain Feb Feb: 13.0°C high, 5.0°C low, 142mm rain Mar Mar: 16.0°C high, 7.0°C low, 132mm rain Apr Apr: 17.0°C high, 9.0°C low, 142mm rain May May: 20.0°C high, 12.0°C low, 127mm rain Jun Jun: 23.0°C high, 15.0°C low, 107mm rain Jul Jul: 25.0°C high, 17.0°C low, 91mm rain Aug Aug: 25.0°C high, 17.0°C low, 112mm rain Sep Sep: 23.0°C high, 15.0°C low, 142mm rain Oct Oct: 20.0°C high, 12.0°C low, 173mm rain Nov Nov: 16.0°C high, 8.0°C low, 226mm rain Dec Dec: 13.0°C high, 6.0°C low, 178mm rain Temperature Rainfall
San Sebastián's weather is not about drama. It is about a steady, gentle mood. The climate is officially oceanic, which means mild temperatures year-round and a dampness that clings like perfume. You will rarely shiver or sweat. Yet you will learn the word txirimiri, the Basque term for the fine mist that drifts off the Bay of Biscay without warning. Humidity hovers at seventy percent every month. Rain is part of the contract. It falls more as soaking mist than as cloudbursts, with autumn and winter delivering the heaviest dose.

Best Time to Visit

Recommended timing for different travel styles.

Beach
July and August bring reliable warmth, highs around 25°C (77°F), and the lowest rainfall, giving you the best odds for long, sunny days on La Concha.
Cultural
May, June, and September sit at 20-23°C (68-73°F), with fewer crowds than peak summer, so you can move between pintxo bars and the old town without the squeeze.
Adventure
The same shoulder seasons shine. The trails stay lush and the temperatures suit strenuous hikes without the sticky humidity found elsewhere.
Budget
Try April or October. Weather turns moody and wetter. Yet accommodation prices drop and the dramatic seaside views are yours alone.

What to Pack

Essentials and seasonal recommendations for San Sebastián.

Year-Round Essentials
A compact, high-quality waterproof jacket with a hood
non-negotiable year-round, as that mist can arrive at any time.
Comfortable walking shoes with good grip
essential for the city's hills and slick cobblestones.
A mid-layer like a fleece or light wool sweater
will serve you well in every season except high summer.
A small backpack or crossbody bag
Pack smart: carry that extra layer and a compact umbrella, your other daily essential.
Quick-dry fabrics or merino wool for your base layers
Given the steady humidity, these can make a big difference in comfort.
summer
Clothing
light breezy clothes, a swimsuit
Footwear
sandals
Layering Tip
still include a light sweater for cooler evenings
spring and fall
Clothing
long pants
Accessories
a scarf
Layering Tip
add a warmer mid-layer
winter
Footwear
waterproof boots
Accessories
a hat, gloves
Layering Tip
calls for a proper coat
Plug Type
Type F (two round pins)
Voltage
230V
Adapter Note
so most North American devices will need an adapter and possibly a converter.
Skip These Items
high heels formal evening wear Heavy ski-wear a bulky rain poncho
Full Packing Checklist

Interactive checklist with shopping links for every item you need.

View San Sebastián Packing List →

Month-by-Month Guide

Climate conditions and crowd levels for each month of the year.

January

January feels quiet and introspective, with cool highs of 13°C (55°F) and plenty of cloud and rain. Crowds are low. The city belongs to locals.

High 13°C (55°F)
Low None
Rainfall None
Crowds low
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February

February continues damp and chilly at 13°C (55°F), with the occasional crisp, clear day good for bracing walks along the promenade. Crowds stay low.

High 13°C (55°F)
Low None
Rainfall None
Crowds low
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March

March hints at change, warming slightly to 16°C (61°F) and showing the first shy signs of spring in the hills, though gray skies and mist still dominate. Visitor levels sit at medium when Easter lands here.

High 16°C (61°F)
Low None
Rainfall None
Crowds medium
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April

April is a month of genuine transition, with highs of 17°C (64°F) and weather that can hand you a sunny afternoon or a cold shower. The city starts to stir. Crowds are medium.

High 17°C (64°F)
Low None
Rainfall None
Crowds medium
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May

May is often lovely, with comfortable temperatures around 20°C (68°F) and countryside turning intensely green. It is a popular window, so crowd levels run medium to high.

High 20°C (68°F)
Low None
Rainfall None
Crowds medium to high
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June

June brings the first real feel of summer, with pleasant highs of 23°C (73°F) and longer days. Beaches begin to fill, and crowd levels climb to high.

High 23°C (73°F)
Low None
Rainfall None
Crowds high
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July

July is typically the driest and sunniest month, warm at 25°C (77°F), and the city pulses at its most lively and crowded.

High 25°C (77°F)
Low None
Rainfall None
Crowds high
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August

August is similar, with peak heat and crowds, though rainfall can still surprise with a passing shower.

High 25°C (77°F)
Low None
Rainfall None
Crowds high
View Details →
September

September is golden, still warm at 23°C (73°F) but with summer throngs easing. The sea is often at its warmest, and crowd levels are high yet tapering.

High 23°C (73°F)
Low None
Rainfall None
Crowds high
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October

October shifts, cooling to 20°C (68°F) and welcoming back serious rain. It is moody, beautiful, and mostly low to medium in crowds.

High 20°C (68°F)
Low None
Rainfall None
Crowds low to medium
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November

November is the wettest month, with cool 16°C (61°F) days and a high chance of dampness. It is quiet, with low crowds, and feels defiantly local.

High 16°C (61°F)
Low None
Rainfall None
Crowds low
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December

December is festive yet damp and chilly at 13°C (55°F), with holiday lights shimmering on wet cobblestones. Crowds hover at medium around the holidays.

High 13°C (55°F)
Low None
Rainfall None
Crowds medium
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