Water temperature in Seattle
58.9
°F
August 29, 17:22
Trend:
decreasingYesterday:
59.8°FTomorrow:
58.5°F
Sunrise:
Sunset:
Day Length:
13 h. 32 min.Seattle in September
Minimum:
45.8°FAverage:
47.6°FMaximum:
49.0°FSea water temperature in Seattle today
As of now, in Seattle, the water temperature is 58.9°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 0.8°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 fall 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 also falls within the range of the average temperature recorded for this date, suggesting a consistent weather trend. The maximum temperature recorded for this date was 60.4°F on 2025, while the historical minimum was 56.2°F on 2024.
Daily water temperature in Seattle
| Date |
Current Year
actual* / forecast** |
last year | 10 years average |
|---|---|---|---|
| Aug 15 | 58.4°F | 57.5°F | 57.6°F |
| Aug 16 | 58.8°F | 57.6°F | 58.1°F |
| Aug 17 | 57.8°F | 57.4°F | 57.9°F |
| Aug 18 | 58.7°F | 57.5°F | 58.0°F |
| Aug 19 | 58.3°F | 57.5°F | 58.0°F |
| Aug 20 | 58.7°F | 58.3°F | 58.4°F |
| Aug 21 | 58.9°F | 56.8°F | 58.1°F |
| Aug 22 | 58.9°F | 58.0°F | 58.1°F |
| Aug 23 | 58.7°F | 57.7°F | 58.2°F |
| Aug 24 | 58.7°F | 57.3°F | 57.8°F |
| Aug 25 | 58.5°F | 58.0°F | 57.8°F |
| Aug 26 | 58.8°F | 58.6°F | 57.9°F |
| Aug 27 | 59.0°F | 60.2°F | 58.1°F |
| Aug 28 | 59.8°F | 60.3°F | 58.3°F |
| Aug 29 | 58.9°F | 60.4°F | 58.0°F |
| Aug 30 | 58.5°F | 59.5°F | 57.7°F |
| Aug 31 | 58.5°F | 57.7°F | 57.6°F |
| Sep 1 | 58.4°F | 58.6°F | 57.5°F |
| Sep 2 | 58.6°F | 58.9°F | 57.8°F |
| Sep 3 | 58.6°F | 58.2°F | 57.8°F |
| Sep 4 | 58.8°F | 58.7°F | 57.9°F |
| Sep 5 | 58.4°F | 58.8°F | 57.5°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.