Spain > Donostia / San Sebastián

Water temperature in Donostia / San Sebastián

Detailed information about the current water temperature in Donostia / San Sebastián. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.

76.3

°F

August 14, 08:06

Trend:

stable

Yesterday:

76.3°F

Tomorrow:

76.3°F

Sunrise:

07:11

Sunset:

21:13

Day Length:

14 h. 2 min.

Donostia / San Sebastián in August

Minimum:

53.9°F

Average:

56.1°F

Maximum:

57.7°F

Sea water temperature in Donostia / San Sebastián today

As of now, in Donostia / San Sebastián, the water temperature is 76.3°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 3.4°F higher than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 74.6°F on 2025, while the historical minimum was 70.8°F on 2017.

latest data

last year

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the maximum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 76.5°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Donostia / San Sebastián

Date	Current Year actual* / forecast**	last year	10 years average
Jul 31	75.2°F	72.5°F	73.3°F
Aug 1	74.2°F	73.1°F	73.1°F
Aug 2	74.7°F	73.2°F	73.0°F
Aug 3	74.8°F	72.6°F	73.1°F
Aug 4	75.0°F	73.6°F	73.4°F
Aug 5	74.4°F	73.7°F	73.2°F
Aug 6	74.0°F	73.4°F	73.1°F
Aug 7	74.3°F	73.5°F	73.2°F
Aug 8	74.5°F	73.1°F	73.2°F
Aug 9	74.7°F	73.1°F	73.1°F
Aug 10	74.6°F	73.0°F	73.1°F
Aug 11	74.8°F	73.0°F	73.0°F
Aug 12	75.7°F	74.8°F	73.2°F
Aug 13	76.3°F	74.6°F	72.9°F
Aug 14	76.3°F	74.6°F	72.8°F
Aug 15	76.3°F	74.6°F	72.9°F
Aug 16	76.5°F	76.0°F	73.1°F
Aug 17	76.6°F	75.6°F	73.2°F
Aug 18	76.7°F	75.5°F	73.3°F
Aug 19	76.6°F	74.9°F	73.2°F
Aug 20	76.6°F	74.3°F	73.2°F
Aug 21	76.4°F	73.9°F	73.0°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in Donostia / San Sebastián by month

In Donostia / San Sebastián, there are only 1 days through the year when the water is warm enough to be comfortable for swimming.

The warmest water in Donostia / San Sebastián was recorded on July 18, 2022, reaching a 77.3°F. While the coldest temperature occurred on February 26, 2018, dipping to 51.4°F. The average readings by season are 55.8°F in Winter, 57.5°F in Spring, 70.8°F in Summer, and 65.8°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Saint-Jean-de-Luz	76.9°F	17mi
Biarritz	76.9°F	24mi
Léon	76.6°F	52mi

* current water temperature in this city

** straight line distance from Donostia / San Sebastián