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.

74.9

°F

July 3, 06:44

Trend:

stable

Yesterday:

75.0°F

Tomorrow:

75.1°F

Sunrise:

06:32

Sunset:

21:52

Day Length:

15 h. 20 min.

Donostia / San Sebastián in July

Minimum:

54.4°F

Average:

56.3°F

Maximum:

57.8°F

Sea water temperature in Donostia / San Sebastián today

As of now, in Donostia / San Sebastián, the water temperature is 74.9°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 5.4°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 rise a bit.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 74.1°F on 2025, while the historical minimum was 67.1°F on 2019.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 75.6°F, with minimum temperature starting at 75.1°F, while the maximum might reach 76.3°F.

Daily water temperature in Donostia / San Sebastián

Date	Current Year actual* / forecast**	last year	10 years average
Jun 19	70.8°F	70.5°F	67.9°F
Jun 20	71.2°F	72.0°F	68.4°F
Jun 21	71.3°F	73.2°F	68.8°F
Jun 22	73.2°F	73.2°F	69.2°F
Jun 23	74.6°F	72.9°F	69.5°F
Jun 24	76.3°F	72.6°F	69.7°F
Jun 25	76.2°F	72.2°F	69.7°F
Jun 26	75.4°F	71.9°F	69.7°F
Jun 27	75.7°F	72.3°F	69.9°F
Jun 28	75.3°F	73.8°F	69.9°F
Jun 29	75.2°F	73.7°F	69.8°F
Jun 30	75.0°F	75.0°F	70.0°F
Jul 1	75.3°F	74.8°F	69.9°F
Jul 2	75.0°F	74.8°F	69.5°F
Jul 3	74.9°F	74.1°F	69.4°F
Jul 4	75.1°F	73.9°F	69.6°F
Jul 5	75.5°F	73.7°F	70.1°F
Jul 6	75.4°F	73.8°F	70.0°F
Jul 7	75.5°F	73.8°F	70.0°F
Jul 8	75.7°F	74.0°F	70.3°F
Jul 9	76.0°F	74.3°F	70.6°F
Jul 10	76.3°F	74.3°F	70.8°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 an average year, Donostia / San Sebastián offers no days when the water temperature is warm enough to swim comfortably.

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, 70.7°F in Summer, and 65.8°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Saint-Jean-de-Luz	75.0°F	17mi
Biarritz	74.4°F	24mi
Léon	71.8°F	52mi

* current water temperature in this city

** straight line distance from Donostia / San Sebastián