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 12.89°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.

55.2

°F

July 2, 23:27

Trend:

decreasing

Yesterday:

55.8°F

Tomorrow:

55.2°F

Sunrise:

05:16

Sunset:

21:10

Day Length:

15 h. 54 min.

Seattle in July

Minimum:

45.9°F

Average:

47.5°F

Maximum:

49.0°F

Sea water temperature in Seattle today

As of now, in Seattle, the water temperature is 55.2°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 1.4°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 stay about the same.

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 59.8°F on 2021, while the historical minimum was 55.0°F on 2025.

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 histoorical minimum and others when it was close to the historical maximum. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 55.7°F, with minimum temperature starting at 55.2°F, while the maximum might reach 56.1°F.

Daily water temperature in Seattle

Date	Current Year actual* / forecast**	last year	10 years average
Jun 18	55.3°F	54.9°F	55.2°F
Jun 19	55.8°F	55.9°F	55.4°F
Jun 20	55.1°F	55.6°F	55.7°F
Jun 21	55.5°F	55.7°F	55.9°F
Jun 22	55.4°F	56.1°F	56.0°F
Jun 23	55.9°F	55.7°F	56.2°F
Jun 24	57.3°F	54.9°F	56.1°F
Jun 25	56.6°F	55.9°F	56.0°F
Jun 26	58.0°F	56.8°F	56.5°F
Jun 27	56.8°F	58.8°F	56.7°F
Jun 28	56.9°F	58.3°F	56.8°F
Jun 29	56.6°F	57.1°F	56.7°F
Jun 30	56.0°F	55.2°F	56.4°F
Jul 1	55.8°F	54.2°F	56.6°F
Jul 2	55.2°F	55.0°F	56.6°F
Jul 3	55.2°F	56.3°F	56.6°F
Jul 4	55.2°F	56.4°F	56.6°F
Jul 5	55.5°F	57.1°F	56.8°F
Jul 6	56.0°F	57.2°F	57.4°F
Jul 7	56.0°F	57.3°F	57.4°F
Jul 8	56.1°F	57.6°F	57.5°F
Jul 9	56.0°F	58.2°F	57.4°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.