Our verdict
The best time to visit San Sebastian is April
In summer, the temperature in San Sebastian can rise as high as 26℃ (79℉). The coldest it usually gets in winter-time in San Sebastian is around 16℃ (61℉).
If you’re keen to work on your tan in San Sebastian, you’re most likely get the longest days between sun-up and sun-down around July. To stay dry, avoid travelling to San Sebastian in October – It’s the wettest month of the year.
For more information about when to travel to San Sebastian, the monthly weather breakdown and the best information and tools to book your trip, continue reading below.
Quick links: Fast facts / Seasons / Average temperatures / Monthly climate / FAQs / Map
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San Sebastian seasons
Before you continue, it’s important to know when the seasons are in San Sebastian as they might be different to yours depending on where in the world you’re travelling from. San Sebastian is in the Northern Hemisphere, so the seasons fall during these months:
| Season | Months |
|---|---|
| Summer | June to August |
| Autumn/fall | September to November |
| Winter | December to February |
| Spring | March to May |
Average temperatures in San Sebastian
If the temperature is a big factor for you to help you decide when to visit, the chart below shows the average minimum and maximum temperatures in San Sebastian for each month side-by-side so you can easily see the difference in weather throughout the year. To see the temperatures in both Celsius (°C) and Fahrenheit (°F), hover or tap the shaded boxes on the graph.
San Sebastian climate by month
If you already have a rough idea about which months you might want to travel, the section below shows a detailed breakdown of the climate in San Sebastian for each month so you can see if it all suits your wants and needs. Scroll down, or use the quick menu below to jump to your preferred month.
Jump to:
San Sebastian in January
- Average temperature: 19℃ (66℉)
- Average high temperature: 20℃ (67℉)
- Average low temperature: 18℃ (65℉)
- Average humidity: 67%
- Average sunny days: 28 days
- Average rainfall: 3mm (0") over 2 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Sebastian in January, make sure you pack a light jumper or hoodie.
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San Sebastian in February
- Average temperature: 19℃ (65℉)
- Average high temperature: 19℃ (67℉)
- Average low temperature: 18℃ (64℉)
- Average humidity: 69%
- Average sunny days: 24 days
- Average rainfall: 6mm (0") over 2 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Sebastian in February, make sure you pack a light jumper or hoodie.
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San Sebastian in March
- Average temperature: 19℃ (66℉)
- Average high temperature: 19℃ (67℉)
- Average low temperature: 18℃ (64℉)
- Average humidity: 72%
- Average sunny days: 26 days
- Average rainfall: 5mm (0") over 5 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Sebastian in March, make sure you pack a light jumper or hoodie.
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San Sebastian in April
- Average temperature: 19℃ (67℉)
- Average high temperature: 20℃ (68℉)
- Average low temperature: 18℃ (65℉)
- Average humidity: 73%
- Average sunny days: 25 days
- Average rainfall: 5mm (0") over 5 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Sebastian in April, make sure you pack a light jumper or hoodie.
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San Sebastian in May
- Average temperature: 20℃ (69℉)
- Average high temperature: 21℃ (70℉)
- Average low temperature: 20℃ (67℉)
- Average humidity: 74%
- Average sunny days: 30 days
- Average rainfall: 0mm (0") over 1 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Sebastian in May, make sure you pack a light jumper or hoodie for the evenings and some light clothes for the daytime.
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San Sebastian in June
- Average temperature: 22℃ (71℉)
- Average high temperature: 22℃ (72℉)
- Average low temperature: 21℃ (70℉)
- Average humidity: 76%
- Average sunny days: 29 days
- Average rainfall: 0mm (0") over 0 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Sebastian in June, make sure you pack t-shirts and maybe a light jumper for the evenings.
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San Sebastian in July
- Average temperature: 23℃ (74℉)
- Average high temperature: 24℃ (75℉)
- Average low temperature: 22℃ (72℉)
- Average humidity: 77%
- Average sunny days: 30 days
- Average rainfall: 0mm (0") over 1 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Sebastian in July, make sure you pack t-shirts and light clothing.
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San Sebastian in August
- Average temperature: 24℃ (75℉)
- Average high temperature: 25℃ (77℉)
- Average low temperature: 23℃ (74℉)
- Average humidity: 76%
- Average sunny days: 28 days
- Average rainfall: 3mm (0") over 2 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Sebastian in August, make sure you pack t-shirts and light clothing.
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San Sebastian in September
- Average temperature: 24℃ (75℉)
- Average high temperature: 25℃ (76℉)
- Average low temperature: 23℃ (74℉)
- Average humidity: 76%
- Average sunny days: 27 days
- Average rainfall: 3mm (0") over 2 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Sebastian in September, make sure you pack t-shirts and light clothing.
San Sebastian in October
- Average temperature: 23℃ (74℉)
- Average high temperature: 24℃ (75℉)
- Average low temperature: 23℃ (73℉)
- Average humidity: 73%
- Average sunny days: 25 days
- Average rainfall: 10mm (0") over 4 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Sebastian in October, make sure you pack t-shirts and light clothing.
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San Sebastian in November
- Average temperature: 22℃ (71℉)
- Average high temperature: 22℃ (72℉)
- Average low temperature: 21℃ (70℉)
- Average humidity: 70%
- Average sunny days: 24 days
- Average rainfall: 10mm (0") over 4 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Sebastian in November, make sure you pack t-shirts and maybe a light jumper for the evenings.
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San Sebastian in December
- Average temperature: 20℃ (69℉)
- Average high temperature: 21℃ (70℉)
- Average low temperature: 20℃ (68℉)
- Average humidity: 68%
- Average sunny days: 25 days
- Average rainfall: 8mm (0") over 4 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to San Sebastian in December, make sure you pack a light jumper or hoodie for the evenings and some light clothes for the daytime.
Add visitor or local insider tips >
