What is the current water temperature in Seattle?

Q: What is the current water temperature in Seattle?

As of now, in Seattle, the water temperature is 9.96°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.

United States > Seattle

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.

49.9

°F

April 30, 05:50

Trend:

increasing

Yesterday:

49.8°F

Tomorrow:

50.1°F

Sunrise:

05:54

Sunset:

20:20

Day Length:

14 h. 26 min.

Seattle in May

Minimum:

46.0°F

Average:

47.4°F

Maximum:

48.5°F

Sea water temperature in Seattle today

As of now, in Seattle, the water temperature is 49.9°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 0.7°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 rise a bit.

Recent sea temperature and forecast

Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. 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 53.5°F on 2016, while the historical minimum was 49.2°F on 2022.

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 maximum recorded over the past years. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 50.7°F, with minimum temperature starting at 50.1°F, while the maximum might reach 51.2°F.

Daily water temperature in Seattle

Date	Current Year actual* / forecast**	last year	10 years average
Apr 16	49.9°F	49.0°F	48.9°F
Apr 17	50.2°F	49.0°F	48.9°F
Apr 18	50.2°F	49.6°F	49.1°F
Apr 19	50.5°F	49.8°F	49.3°F
Apr 20	50.4°F	49.8°F	49.6°F
Apr 21	50.1°F	50.4°F	49.8°F
Apr 22	50.4°F	50.5°F	49.9°F
Apr 23	50.9°F	50.5°F	50.0°F
Apr 24	50.8°F	50.0°F	49.9°F
Apr 25	50.6°F	49.8°F	49.9°F
Apr 26	51.5°F	49.7°F	50.1°F
Apr 27	51.3°F	49.6°F	50.2°F
Apr 28	51.3°F	49.8°F	50.3°F
Apr 29	49.8°F	49.7°F	50.3°F
Apr 30	49.9°F	49.8°F	50.6°F
May 1	50.1°F	50.1°F	50.7°F
May 2	50.1°F	50.6°F	50.7°F
May 3	50.5°F	50.8°F	51.1°F
May 4	50.9°F	51.4°F	51.5°F
May 5	51.0°F	51.5°F	51.7°F
May 6	51.2°F	51.4°F	51.9°F
May 7	51.2°F	51.3°F	51.9°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 47.8°F in Winter, 49.7°F in Spring, 57.1°F in Summer, and 54.4°F in Autumn.