January in San Sebastian — the hardest end of the year
Hardest · 3/10January averages 9°C (48°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
At 173 mm this is a genuinely wet month: about 15 days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 3/10 here, 11th of 12 months, against 8.4/10 in the destination's best month.
Figure on low-season pricing, with crowds are light for this destination.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella.
Flexible dates? July scores 5.4 points higher here — enough to change the trip.
February in San Sebastian — the hardest end of the year
Hardest · 4/10February averages 10°C (50°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
At 120 mm this is a genuinely wet month: about 18 days with 6+ hours of sunshine in total, and outdoor plans need an indoor fallback.
It scores 4/10 here, 9th of 12 months, against 8.4/10 in the destination's best month.
Figure on low-season pricing, with crowds are light for this destination.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella.
Flexible dates? July scores 4.4 points higher here — enough to change the trip.
March in San Sebastian — off-season conditions
Hardest · 4.4/10Temperatures hover around 13°C (55°F) — the kind of month where neither heat nor cold forces the schedule.
139 mm of rain makes this a wet month here, though with about 24 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 4.4/10 on the same scale — 7th of 12 months, versus 8.4/10 for the best month here.
Expect low-season pricing, and crowds are light for this destination.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
If your dates are flexible, July is materially better in San Sebastian — 4 points higher on the same scale.
April in San Sebastian — off-season conditions
Hardest · 4.3/10April averages 13°C (55°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Monthly rainfall reaches 154 mm — wet for this destination — but about 23 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 4.3/10 here, 8th of 12 months, against 8.4/10 in the destination's best month.
Plan for low-season pricing, with crowds are light for this destination.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
Flexible dates? July scores 4.1 points higher here — enough to change the trip.
May in San Sebastian — middling scores, decent value
Trade-offs · 5/10Temperatures hover around 16°C (60°F) — the kind of month where neither heat nor cold forces the schedule.
115 mm of rain makes this a wet month here, though with about 27 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 5/10 on the same scale — 6th of 12 months, versus 8.4/10 for the best month here.
Budget for low-season pricing, and crowds are light for this destination. That combination — decent conditions at the lowest rates of the year — is the best value window on this page.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
If your dates are flexible, July is materially better in San Sebastian — 3.4 points higher on the same scale.
June in San Sebastian: mixed conditions, plan around the weather
Trade-offs · 6.6/10June averages 19°C (67°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Monthly rainfall reaches 106 mm — wet for this destination — but about 23 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 6.6/10 here, 3rd of 12 months, against 8.4/10 in the destination's best month.
Plan for mid-season pricing, with crowds are moderate.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.
Flexible dates? July scores 1.8 points higher here — enough to change the trip.
July: the best month of the year in San Sebastian
Best window · 8.4/10July averages 21°C (69°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 50 mm, so plan one flexible day in three; you still get about 28 days with 6+ hours of sunshine and 15 hours of daylight.
On our climate-comfort scale this is the top-ranked month of the year for San Sebastian at 8.4/10 — the reference point every other month on this page is measured against.
Figure on peak pricing, with this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
August in San Sebastian: strong conditions, 2nd of 12
Good · 7.2/10With 21°C (70°F) on average, August delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.
136 mm of rain makes this a wet month here, though with about 27 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 7.2/10 on the same scale — 2nd of 12 months, versus 8.4/10 for the best month here.
Budget for peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.
September in San Sebastian — workable with trade-offs
Trade-offs · 6.1/10With 19°C (67°F) on average, September delivers classic beach weather: plenty of time in the water, with beach and boat plans rarely disrupted by cold.
147 mm of rain makes this a wet month here, though with about 25 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 6.1/10 on the same scale — 4th of 12 months, versus 8.4/10 for the best month here.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.
If your dates are flexible, July is materially better in San Sebastian — 2.3 points higher on the same scale.
October in San Sebastian — workable with trade-offs
Trade-offs · 6.1/10October averages 19°C (66°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Monthly rainfall reaches 132 mm — wet for this destination — but about 22 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 6.1/10 here, 5th of 12 months, against 8.4/10 in the destination's best month.
Plan for mid-season pricing, with crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
Flexible dates? July scores 2.3 points higher here — enough to change the trip.
November in San Sebastian — off-season conditions
Hardest · 3.2/10November averages 14°C (57°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
200 mm of rain puts this in monsoon territory — about 18 days with 6+ hours of sunshine across the whole month, and multi-day washouts are normal.
It scores 3.2/10 here, 10th of 12 months, against 8.4/10 in the destination's best month.
Figure on low-season pricing, with crowds are light for this destination.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
Flexible dates? July scores 5.2 points higher here — enough to change the trip.
December in San Sebastian — off-season conditions
Hardest · 2.7/10Expect 11°C (52°F) in December. A good month for city streets, viewpoints and long meals; leave swimming for another season.
187 mm of rain signals a properly wet month, with only about 14 days with 6+ hours of sunshine to count on — build indoor options into the schedule.
That is 2.7/10 on the same scale — 12th of 12 months, versus 8.4/10 for the best month here.
Expect low-season pricing, and crowds are light for this destination.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella.
If your dates are flexible, July is materially better in San Sebastian — 5.7 points higher on the same scale.
