Water temperature in San Sebastian
88.3
°F
October 4, 16:17
Trend:
increasingYesterday:
87.6°FTomorrow:
88.6°F
Sunrise:
Sunset:
Day Length:
12 h. 0 min.San Sebastian in October
Minimum:
81.2°FAverage:
82.3°FMaximum:
84.7°FSea water temperature in San Sebastian today
As of now, in San Sebastian, the water temperature is 88.3°F. Swimming in water of this temperature is considered highly warm and would be enjoyable for everyone. At this temperature, you can comfortably engage in water-based activities for extended periods without experiencing discomfort. Today's reading is 2.4°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. 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 87.2°F on 2020, while the historical minimum was 84.5°F on 2025.
Daily water temperature in San Sebastian
| Date |
Current Year
actual* / forecast** |
last year | 10 years average |
|---|---|---|---|
| Sep 20 | 88.3°F | 85.8°F | 86.4°F |
| Sep 21 | 88.1°F | 85.7°F | 86.3°F |
| Sep 22 | 88.0°F | 85.8°F | 86.3°F |
| Sep 23 | 87.8°F | 85.7°F | 86.2°F |
| Sep 24 | 87.5°F | 85.6°F | 86.2°F |
| Sep 25 | 87.5°F | 85.4°F | 86.1°F |
| Sep 26 | 88.3°F | 85.4°F | 86.2°F |
| Sep 27 | 88.1°F | 85.5°F | 86.1°F |
| Sep 28 | 88.3°F | 85.6°F | 86.3°F |
| Sep 29 | 88.2°F | 84.3°F | 86.2°F |
| Sep 30 | 88.2°F | 85.3°F | 86.3°F |
| Oct 1 | 88.1°F | 85.1°F | 86.2°F |
| Oct 2 | 88.0°F | 85.1°F | 86.1°F |
| Oct 3 | 87.6°F | 85.2°F | 86.0°F |
| Oct 4 | 88.3°F | 84.5°F | 85.8°F |
| Oct 5 | 88.6°F | 85.6°F | 86.1°F |
| Oct 6 | 88.5°F | 85.6°F | 86.0°F |
| Oct 7 | 88.4°F | 85.5°F | 86.0°F |
| Oct 8 | 88.7°F | 85.5°F | 86.2°F |
| Oct 9 | 88.8°F | 85.4°F | 86.3°F |
| Oct 10 | 88.8°F | 85.3°F | 86.3°F |
| Oct 11 | 88.8°F | 85.0°F | 86.3°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.
