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 9.55°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.

49.2

°F

April 3, 03:20

Trend:

decreasing

Yesterday:

49.6°F

Tomorrow:

49.0°F

Sunrise:

06:44

Sunset:

19:42

Day Length:

12 h. 58 min.

Seattle in April

Minimum:

45.9°F

Average:

47.3°F

Maximum:

48.7°F

Sea water temperature in Seattle today

As of now, in Seattle, the water temperature is 49.2°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 1.3°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

Today's water temperature is considerably 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 52.4°F on 2016, while the historical minimum was 46.7°F on 2021.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 49.3°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in Seattle

Date	Current Year actual* / forecast**	last year	10 years average
Mar 20	47.1°F	48.0°F	47.2°F
Mar 21	47.9°F	49.0°F	47.5°F
Mar 22	48.4°F	48.8°F	47.6°F
Mar 23	47.2°F	48.7°F	47.6°F
Mar 24	48.8°F	48.3°F	47.6°F
Mar 25	52.5°F	48.3°F	47.9°F
Mar 26	53.3°F	48.4°F	48.0°F
Mar 27	53.6°F	48.3°F	48.2°F
Mar 28	53.7°F	48.1°F	48.2°F
Mar 29	51.8°F	48.1°F	48.0°F
Mar 30	50.2°F	47.9°F	47.9°F
Mar 31	49.7°F	48.8°F	47.9°F
Apr 1	51.3°F	48.8°F	47.9°F
Apr 2	49.6°F	49.6°F	48.1°F
Apr 3	49.2°F	50.1°F	47.9°F
Apr 4	49.0°F	49.7°F	47.7°F
Apr 5	49.0°F	49.3°F	47.7°F
Apr 6	48.8°F	48.9°F	47.5°F
Apr 7	49.1°F	48.8°F	47.8°F
Apr 8	49.4°F	48.9°F	48.1°F
Apr 9	49.6°F	48.9°F	48.3°F
Apr 10	49.8°F	48.9°F	48.5°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.

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.