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.

69.1

°F

September 18, 11:46

Trend:

decreasing

Yesterday:

69.5°F

Tomorrow:

68.8°F

Sunrise:

07:50

Sunset:

20:13

Day Length:

12 h. 23 min.

Donostia / San Sebastián in September

Minimum:

53.6°F

Average:

56.0°F

Maximum:

57.8°F

Sea water temperature in Donostia / San Sebastián today

As of now, in Donostia / San Sebastián, the water temperature is 69.1°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 1.1°F lower 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 fall a bit.

Recent sea temperature and forecast

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 73.6°F on 2023, while the historical minimum was 68.2°F on 2015.

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 minimum recorded over the past years. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 68.3°F, the minimum temperature may reach 67.9°F, and the maximum might stay at 68.8°F.

Daily water temperature in Donostia / San Sebastián

Date	Current Year actual* / forecast**	last year	10 years average
Sep 4	71.3°F	72.5°F	71.5°F
Sep 5	70.9°F	72.3°F	71.3°F
Sep 6	70.6°F	72.1°F	71.4°F
Sep 7	71.3°F	71.7°F	71.5°F
Sep 8	71.3°F	71.3°F	71.3°F
Sep 9	71.1°F	70.7°F	71.3°F
Sep 10	70.8°F	70.3°F	71.2°F
Sep 11	70.6°F	70.2°F	71.1°F
Sep 12	70.4°F	70.1°F	71.2°F
Sep 13	70.3°F	69.6°F	71.2°F
Sep 14	69.5°F	69.2°F	71.0°F
Sep 15	69.4°F	69.5°F	70.7°F
Sep 16	69.4°F	70.1°F	70.6°F
Sep 17	69.5°F	69.4°F	70.4°F
Sep 18	69.1°F	68.9°F	70.3°F
Sep 19	68.8°F	68.7°F	69.9°F
Sep 20	68.6°F	69.3°F	69.8°F
Sep 21	68.6°F	69.0°F	69.7°F
Sep 22	68.5°F	68.9°F	69.6°F
Sep 23	68.2°F	68.9°F	69.3°F
Sep 24	68.0°F	68.7°F	69.2°F
Sep 25	67.9°F	68.1°F	69.0°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 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 55.7°F in Winter, 57.3°F in Spring, 70.6°F in Summer, and 65.6°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Saint-Jean-de-Luz	70.8°F	17mi
Biarritz	69.7°F	24mi
Léon	69.6°F	52mi

* current water temperature in this city

** straight line distance from Donostia / San Sebastián