ClimavisoBad weather in San Sebastián
Updated 26 October 2026. Averages for 2019–2025; 2026 up to 26 October 2026.
San Sebastián is rain: by far its top reason for a warning. Yet its red days have nearly all been for heat.
43
warning days a year
Spain: 54
5.7
orange or red warning days
a year
4
red days
2019–2025
#130
of 182 zones
1 = most warnings
The Gipuzkoa coast gets fewer warnings than a typical Spanish zone, and most are for heavy rain spread across the year. Storms and wind complete the list.
The paradox, as in Bilbao: here red for heat starts at 40 °C, and the hot days that pass it become red warnings. It has happened in several summers.
San Sebastián has 189,866 inhabitants and sits in the Gipuzkoa litoral warning zone (Gipuzkoa). Warnings are issued for the whole zone: it shares them with 10 other towns, such as Irun, Errenteria and Zarautz.
San Sebastián's warning zone and its neighbours
AEMET doesn't warn by city but by zone: San Sebastián gets the warnings for the Gipuzkoa litoral zone, outlined on the map. The zones around it have their own thresholds and their own warnings.
Average warning days a year, 2019–2025, against the median of Spain's zones (54 days). Tap a zone to go to its page.
- Gipuzkoa litoral (San Sebastián's zone): 43 days a year
- Bizkaia litoral: 37 days a year
- Bizkaia interior: 41 days a year
- Cuenca del Nervión: 45 days a year
- Gipuzkoa interior: 47 days a year
- Llanada alavesa: 52 days a year
- Norte de Burgos: 63 days a year
- Vertiente cantábrica de Navarra: 67 days a year
- Centro de Navarra: 68 days a year
- Pirineo navarro: 82 days a year
San Sebastián's bad-weather fingerprint
Each axis compares the warning days a year in San Sebastián's zone with the average of Spain's 182 zones. The dashed circle is the average zone; the edge, three times the average or more.
More warnings than the average zone: rain (1.6×).
Fewer than average: fog, cold and snow.
Averages for 2019–2025. It measures how often AEMET issued warnings, not danger or damage.
The year, month by month
Warning days in each month, averaged over 2019–2025, by the day's highest level.
Every day since 2019
Each line is one year in San Sebastián, January to December, and each mark a day with a warning in its zone: you can see at a glance when bad weather bunches up and which years were calmer.
The colour is each day's highest level. 2026: up to 26 October 2026. Hover or tap a mark to see the dates.
Which warnings, in which months
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain | 2.0 | 0.4 | 0.9 | 1.3 | 2.9 | 4.4 | 1.1 | 3.9 | 4.0 | 2.1 | 4.3 | 2.1 |
| Storms | 0.3 | 0.6 | 1.6 | 3.9 | 1.7 | 1.9 | 1.9 | 0.3 | ||||
| Wind | 2.0 | 1.0 | 1.0 | 0.4 | 0.1 | 0.4 | 1.1 | 2.0 | 2.6 | |||
| Heat | 0.7 | 1.0 | 1.3 | 0.3 | ||||||||
| Cold | 0.4 | |||||||||||
| Snow | 0.3 | 0.1 |
Warning days of each type and month, yearly average 2019–2025. A day with rain and storms counts in both rows.
Month by month, in detail
January
4.0 warning days on average (0.4 orange or red). Mostly: rain and wind.
February
The quietest month1.6 warning days on average. Mostly: wind and rain.
March
2.0 warning days on average (0.1 orange or red). Mostly: wind and rain.
April
1.9 warning days on average. Mostly: rain and storms.
May
3.3 warning days on average. Mostly: rain and storms.
June
The busiest month5.7 warning days on average (1.4 orange or red). Mostly: rain and storms.
July
2 red days since 20192.7 warning days on average (0.6 orange or red). Mostly: storms and rain.
August
2 red days since 20195.1 warning days on average (1.1 orange or red). Mostly: rain and storms.
September
4.4 warning days on average (0.4 orange or red). Mostly: rain and storms.
October
3.0 warning days on average (0.3 orange or red). Mostly: rain and wind.
November
6.0 warning days on average (0.3 orange or red). Mostly: rain and wind.
December
3.7 warning days on average (1.0 orange or red). Mostly: wind and rain.
The best month to go (if you'd rather not see warnings)
Counting warning days and how serious they are, the quietest months in San Sebastián are February and April: 1.6 and 1.9 warning days on average. The busiest is June, with 5.7.
February and April are the quietest months.
Summers: the heat
San Sebastián has 3.3 heat-warning days a year (1.3 of them orange or red). Yellow starts at a forecast high of 34 °C; orange at 37 °C; red at 40 °C.
The heat-warning season usually runs from 26 June to 15 August. The earliest one came on 11 June; the latest, on 14 September.
Red heat days since 2019: 30 July 2020, 18 July 2022, 11 August 2024 and 24 June 2026.
Winters: cold, snow and wind
Winter (December to February) brings 9.3 warning days on average: rain (4.6), wind (5.6), cold (0.4) and snow (0.4).
The yellow cold warning starts at lows of −1 °C; red, at −8 °C. Snow, at 2 cm in 24 hours.
Rain and storms
San Sebastián has 29 rain-warning days and 12 storm-warning days a year. The months with the most rain warnings are June, November and September.
Here the yellow rain warning starts at 15 mm in an hour or 40 mm in 12 hours; red, at 60 mm or 120 mm.
Red rain or storm days since 2019: 18 August 2022.
The rain that reaches a warning is the heavy kind, not the everyday kind.
Wind, fog and coast
Wind warnings: 11 days a year; yellow starts at gusts of 90 km/h.
Year by year
| Year | Warning days | Orange | Red | Mostly |
|---|---|---|---|---|
| 2026* | 49 | 6 | 1 | rain and storms |
| 2025 | 38 | 7 | 0 | rain and storms |
| 2024 | 53 | 4 | 1 | rain and storms |
| 2023 | 48 | 7 | 0 | rain and storms |
| 2022 | 36 | 1 | 2 | rain and storms |
| 2021 | 36 | 3 | 0 | rain and wind |
| 2020 | 45 | 1 | 1 | rain and wind |
| 2019 | 48 | 13 | 0 | rain and wind |
2026, up to 26 October 2026. For the same stretch of the year, the 2019–2025 average is 33 days.
The year with the most warnings was 2024, with 53 days.
The worst days
Every red day since June 2018:
- 24 June 2026 heat
- 11 August 2024 heat
- 18 August 2022 rain
- 18 July 2022 heat
- 30 July 2020 heat
The longest run of consecutive warning days lasted 7 days, from 5 November 2019 to 11 November 2019.
When a warning is issued in San Sebastián
| Yellow | Orange | Red | |
|---|---|---|---|
| Heat (high) | 34 °C | 37 °C | 40 °C |
| Cold (low) | −1 °C | −4 °C | −8 °C |
| Wind (gusts) | 90 km/h | 110 km/h | 140 km/h |
| Rain in 1 hour | 15 mm | 30 mm | 60 mm |
| Rain in 12 hours | 40 mm | 80 mm | 120 mm |
| Snow in 24 hours | 2 cm | 5 cm | 20 cm |
Thresholds for the Gipuzkoa litoral zone in AEMET's warning plan. Storms have no numeric threshold: yellow for strong storms, orange for very strong ones. More in what each colour means.
San Sebastián compared with other cities
| City | Warning days a year | Orange or red a year | Red days since 2019 | Mostly |
|---|---|---|---|---|
| Lleida | 92 | 17 | 9 | heat and storms |
| Zaragoza | 89 | 22 | 20 | heat and storms |
| Cuenca | 85 | 14 | 3 | heat and storms |
| Soria | 85 | 9.1 | 1 | storms and rain |
| Teruel | 84 | 11 | 4 | storms and rain |
| Albacete | 83 | 14 | 7 | heat and storms |
| Palma | 78 | 15 | 1 | rain and storms |
| Huesca | 77 | 12 | 0 | storms and rain |
| Segovia | 74 | 8.0 | 0 | storms and wind |
| Córdoba | 73 | 29 | 15 | heat and rain |
| Ávila | 73 | 7.1 | 4 | rain and wind |
| Sevilla | 69 | 23 | 12 | heat and rain |
| Pamplona | 68 | 15 | 6 | storms and rain |
| Ibiza | 67 | 13 | 2 | rain and wind |
| Girona | 66 | 10 | 4 | rain and storms |
| Madrid | 65 | 16 | 5 | heat and storms |
| Valladolid | 65 | 9.0 | 0 | heat and storms |
| Burgos | 64 | 6.6 | 1 | storms and rain |
| Zamora | 63 | 7.1 | 0 | heat and storms |
| Palencia | 59 | 5.6 | 0 | storms and rain |
| Jaén | 59 | 25 | 7 | heat and rain |
| Salamanca | 59 | 6.4 | 0 | heat and storms |
| Toledo | 58 | 20 | 5 | heat and rain |
| Logroño | 58 | 14 | 7 | storms and heat |
| Badajoz | 57 | 19 | 9 | heat and rain |
| Guadalajara | 57 | 9.9 | 3 | heat and storms |
| Granada | 56 | 14 | 5 | heat and storms |
| Almería | 55 | 5.3 | 0 | wind and heat |
| Dénia | 55 | 12 | 8 | rain and storms |
| Barcelona | 54 | 9.4 | 5 | rain and storms |
| Vitoria-Gasteiz | 52 | 10 | 2 | storms and wind |
| València | 51 | 12 | 13 | rain and storms |
| Ciudad Real | 50 | 13 | 0 | heat and rain |
| León | 50 | 3.6 | 0 | storms and rain |
| Tarragona | 49 | 8.7 | 2 | rain and storms |
| Murcia | 46 | 13 | 11 | heat and rain |
| Vigo | 46 | 5.1 | 0 | rain and wind |
| Castellón de la Plana | 45 | 11 | 2 | rain and storms |
| San Sebastián | 43 | 5.7 | 4 | rain and storms |
| Bilbao | 41 | 8.0 | 9 | rain and storms |
| Alicante | 41 | 7.1 | 11 | rain and heat |
| A Coruña | 41 | 6.7 | 2 | wind and rain |
| Cáceres | 40 | 9.7 | 0 | heat and rain |
| Lugo | 39 | 3.3 | 0 | rain and wind |
| Ourense | 39 | 6.1 | 4 | heat and rain |
| Cádiz | 39 | 5.1 | 2 | rain and wind |
| Huelva | 39 | 9.1 | 7 | heat and rain |
| Santa Cruz de Tenerife | 37 | 5.7 | 3 | wind and heat |
| Málaga | 35 | 10 | 15 | rain and heat |
| Santander | 33 | 3.1 | 3 | rain and wind |
| Las Palmas de Gran Canaria | 26 | 2.9 | 0 | heat and wind |
| Oviedo | 26 | 3.1 | 1 | rain and storms |
| Gijón | 26 | 2.0 | 0 | rain and wind |
| Avilés | 22 | 1.9 | 0 | rain and wind |
Averages for 2019–2025. Careful: each zone has its own thresholds, so a warning doesn't mean exactly the same everywhere.
If you live in San Sebastián or are thinking of moving
- With 5.7 orange or red days a year, serious warnings come a few times a year, nearly always in the same seasons.
- An umbrella is essential, but warnings are fewer than the reputation suggests.
- Be ready for days of strong heat, even if they're few: they've reached red here.
- After rain, storms and wind are the most common warnings.
In short
A rainy city with moderate warnings and the odd day of exceptional heat. What's rare here isn't a rain warning, it's a heat one.
Frequently asked questions
When does it rain most in San Sebastián?
Going by the warnings, the months with the most rain-warning days are June and November. On average there are 29 rain-warning days a year.
What's the best month to visit San Sebastián?
If you want to dodge bad-weather warnings, February and April: they have the fewest warning days on average.
Have there been red warnings in San Sebastián?
Yes: 5 red days since June 2018, the latest on 24 June 2026 (heat).
Does it get very hot in San Sebastián?
There are 3.3 heat-warning days a year on average. The yellow warning here starts at a forecast high of 34 °C.
How this was made
Everything comes from the archive of official AEMET warnings that Climaviso has kept since June 2018: each day counts once, at the highest level the zone had. A warning is a forecast, not damage or a measurement, and it's issued for the whole zone, not your street. We don't cover measured temperatures or rainfall: only when, and why, a warning was issued.
More on San Sebastián
- Camino del Norte weather, stage by stage
- EuroVelo 1 weather, stage by stage
- San Sebastián's warnings day by day since 2018
- The Gipuzkoa litoral zone
- Today's and tomorrow's warnings in Gipuzkoa
- How the year is going across Spain
- How warnings work
- Bilbao vs San Sebastián
- Pamplona vs San Sebastián
Other cities
- Madrid
- Barcelona
- València
- Sevilla
- Zaragoza
- Málaga
- Bilbao
- Alicante
- Gijón
- Avilés
- Murcia
- Palma
- Las Palmas de Gran Canaria
- Santa Cruz de Tenerife
- Valladolid
- Vigo
- A Coruña
- Granada
- Córdoba
- Oviedo
- Pamplona
- Santander
- Salamanca
- Logroño
- Castellón de la Plana
- Cádiz
- Dénia
- Ibiza
- Almería
- Albacete
- Ávila
- Badajoz
- Burgos
- Cáceres
- Ciudad Real
- Cuenca
- Girona
- Guadalajara
- Huelva
- Huesca
- Jaén
- León
- Lleida
- Lugo
- Ourense
- Palencia
- Segovia
- Soria
- Tarragona
- Teruel
- Toledo
- Vitoria-Gasteiz
- Zamora