August could be a good time to visit San Sebastian, as the weather is generally fine. The average high temperature is around +24°C, and there are typically 5 sunny days in August. However, expect about 16 rainy days, and total monthly rainfall of approximately 102 mm. The weather is changeable so pack for every eventuality. Search flightsin one click on Avionero.
Good to know:
August is usually the hottest month of the year in San Sebastian;
August is usually the wettest month of the year in San Sebastian;
Average weather
☀️
+24°C
Avg. max. temperature
+12°C
Min.
+39°C
Max.
102 mm
Total precipitation
80%
Avg. humidity
1 m/s
Avg. wind
5 ☀️
Sunny Days
8 ⛅️
Cloudy
16 🌦
Rainy
Our opinion: San Sebastian has OK weather in August.
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Average temperature in San Sebastian in August
Here are the expected maximum, average and minimum temperatures in San Sebastian for August based on the historical data.
Last Year
Historical Data
The expected average maximum temperature in August is +25°C with a maximum of +37°C and a minimum of +14°C.
The average maximum temperature goes up 4% by the end of the month, compared with the beginning of the month, from +24°C to +25°C.
Is San Sebastian warm or cold in August?
San Sebastian is typically warm in August.
Maximum temperatures go up compared to the previous month from +23°C to +24°C. The minimum temperature also goes up from +18°C to +18°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
August is the hottest month in San Sebastian, here is the comparison with other months:
Water temperature in San Sebastian in August
Water in San Sebastian in August is Comfortable. It varies from +20°C to +23°C, with an average of +21°C.This is almost similar to the air temperature, which averages +24°C.
The water temperature in August is one of the warmest of the entire year:
The warmest water temperatures in San Sebastian are reached in August, when the average sea temperature rises to +21°C. The coldest water temperatures are in February, with an average of +12°C.
Can you swim in San Sebastian in August?
The water in San Sebastian in August is pretty comfortable (+21°C in average). Ideal for swimming, especially in outdoor pools and open water. Suitable for recreational and casual swimmers.
🦭
Cold
Below +16°C
🏄♂️
Fresh
16°C - 21°C
🏊
Comfortable
21°C - 25°C
👙
Warm
25°C - 28°C
🔥
Very warm
+28°C and up
Don’t forget a large beach towel or two for drying off.
Climate in San Sebastian in August
San Sebastian weather looks like this, on average, in August and the surrounding months.
July
August
September
Avg. temperature
+23°C
+24°C
+23°C
Min. temperature
+12°C
+12°C
+7°C
Max. temperature
+41°C
+39°C
+37°C
Rainfall
93 mm
102 mm
109 mm
Wind
2 m/s
1 m/s
2 m/s
Avg. water temperature
+21°C
+21°C
+21°C
Humidity
80%
80%
78%
Air pressure
1018 HPa
1017 HPa
1017 HPa
Sunny days
4
5
6
Cloudy days
9
8
7
Rainy days
16
16
15
Snowy days
0
0
0
August weather is still as ok as in July.It’s getting warmer as August arrives. The average maximum temperature goes up from +23°C to +24°C during the day.Prepare for more rain. Average rainfall goes from 93 mm to 102 mm.Humidity levels don’t change as the month goes on, averaging around 80%.Winds are calmer in comparison to July, going down from 2 m/s to 1 m/s on average.The good news is there are likely to be more sunny days in August, from 4 to 5.
September brings much the same weather, it remains ok.
Wind speed in San Sebastian in August based on historical data.
Last Year
Historical Data
The average wind speed is 2 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in San Sebastian is gradually increasing during August, going from 2 m/s to 2 m/s over the course of the month.
Rain
Amount of rainfall in mm during August in San Sebastian based on historical data.
Last Year
Historical Data
Total precipitation in August is about 201 mm, with a 61% chance of rain on a typical day. The maximum amount of rainfall per day is around 40 mm, which is moderate rain.August is a pretty wet month with over 19 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of galoshes.
Here’s how August is compared with other months in the amount of precipitation, total mm:
San Sebastian wettest month is November, where a typical day has a 60% chance of precipitation and 191 mm of rainfall per day. July, on the other hand, is the driest month with a mere 52% chance of precipitation and 93 mm of rainfall per day.
How was the weather last August in San Sebastian?
This is the weather in San Sebastian in August 2024:
1 August
☀️
+24°C
2 August
🌧️
+30°C
3 August
🌧️
+21°C
4 August
🌧️
+21°C
5 August
☁️
+22°C
6 August
☁️
+22°C
7 August
☀️
+23°C
8 August
☀️
+25°C
9 August
☀️
+35°C
10 August
☀️
+25°C
11 August
☀️
+26°C
12 August
☁️
+26°C
13 August
🌧️
+23°C
14 August
☁️
+23°C
15 August
☁️
+25°C
16 August
🌧️
+24°C
17 August
☁️
+26°C
18 August
☀️
+32°C
19 August
☀️
+27°C
20 August
☁️
+25°C
21 August
☁️
+27°C
22 August
☁️
+27°C
23 August
☀️
+37°C
24 August
☀️
+30°C
25 August
🌧️
+23°C
26 August
🌧️
+20°C
27 August
🌧️
+21°C
28 August
🌧️
+21°C
29 August
🌧️
+21°C
30 August
🌧️
+22°C
31 August
☀️
+25°C
In August 2024 San Sebastian had 11 sunny days, 9 cloudy days, and 11 rainy days. The average maximum temperature was +25°C, with an absolute maximum of +37°C and a minimum of +20°C. The average humidity was 83%, with a maximum of 100% and a minimum of 52%. The average wind speed was 2 m/s, with a maximum of 9 m/s and a minimum of 0 m/s.
Are you planning a trip in August?
Climate Change over Years
This is how San Sebastian climate have been changing during last 43 years period.
The climate in San Sebastian in August has not changed much over the last 43 years.
The average temperature was the lowest in 1984 (+16°C) and the highest in 2022 (+20°C). The driest year was 1989 with only 973 mm of rainfall, and the wettest year was 2019 with 4351 mm.
FAQ
Frequently asked questions about the weather in San Sebastian in August:
Is August a good time to visit San Sebastian?
It’s always a good time to visit San Sebastian, but the weather is changeable in August, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.
Can you sunbathe in San Sebastian in August?
August is warm in San Sebastian. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.
Can you swim in San Sebastian in August?
Yes, the water temperature in San Sebastian in August is considered moderate and enjoyable for most people, averaging around +21°C.
Is San Sebastian rainy in August?
San Sebastian is often rainy in August. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in San Sebastian in August?
Usually, it’s not very sunny in San Sebastian in August, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
For this page, we’ve looked at the typical weather in San Sebastian, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
