All data are in degrees Fahrenheit

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Water temperature in Seattle

Detailed information about the current water temperature in Seattle. 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.
Sea temperature in Seattle now

58.7

°F

August 20, 11:02

Trend:

stable

Yesterday:

58.3°F

Tomorrow:

58.4°F

Sunrise:

06:12

Sunset:

20:13

Day Length:

14 h. 1 min.

Seattle in August

Minimum:

45.7°F

Average:

47.5°F

Maximum:

48.9°F

Sea water temperature in Seattle today

As of now, in Seattle, the water temperature is 58.7°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 0.4°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 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 59.4°F on 2023, while the historical minimum was 57.4°F on 2021.

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. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 58.3°F, the minimum temperature may reach 58.0°F, and the maximum might stay at 58.5°F.

Daily water temperature in Seattle

Date Current Year

actual* / forecast**

last year 10 years average
Aug 6 57.8°F 57.8°F 58.1°F
Aug 7 57.6°F 57.7°F 57.8°F
Aug 8 59.4°F 58.9°F 58.0°F
Aug 9 59.2°F 59.1°F 58.1°F
Aug 10 59.0°F 59.3°F 58.3°F
Aug 11 58.3°F 58.9°F 57.9°F
Aug 12 59.1°F 59.5°F 58.1°F
Aug 13 58.9°F 56.8°F 57.9°F
Aug 14 58.7°F 57.8°F 57.8°F
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 58.4°F 56.8°F 58.0°F
Aug 22 58.4°F 58.0°F 58.0°F
Aug 23 58.5°F 57.7°F 58.1°F
Aug 24 58.0°F 57.3°F 57.7°F
Aug 25 58.1°F 58.0°F 57.7°F
Aug 26 58.2°F 58.6°F 57.8°F
Aug 27 58.4°F 60.2°F 58.0°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 Seattle by month

In an average year, Seattle offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in Seattle was recorded on July 6, 2021, reaching a 63.4°F. While the coldest temperature occurred on January 29, 2022, dipping to 44.4°F. The average readings by season are 47.9°F in Winter, 49.6°F in Spring, 57.0°F in Summer, and 54.4°F in Autumn.