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 8.35°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.

47.0

°F

January 21, 16:22

Trend:

increasing

Yesterday:

47.0°F

Tomorrow:

47.1°F

Sunrise:

07:48

Sunset:

16:54

Day Length:

9 h. 6 min.

Seattle in January

Minimum:

46.6°F

Average:

48.0°F

Maximum:

49.2°F

Sea water temperature in Seattle today

As of now, in Seattle, the water temperature is 47.0°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 0.6°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 slightly 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 48.7°F on 2015, while the historical minimum was 46.7°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 minimum recorded over the past years. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 47.0°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
Jan 7	47.7°F	49.0°F	47.4°F
Jan 8	47.7°F	48.7°F	47.3°F
Jan 9	47.4°F	48.4°F	47.5°F
Jan 10	47.2°F	49.4°F	47.5°F
Jan 11	47.9°F	49.0°F	47.4°F
Jan 12	47.9°F	48.9°F	47.3°F
Jan 13	47.6°F	48.7°F	47.4°F
Jan 14	47.6°F	48.0°F	47.5°F
Jan 15	47.5°F	48.0°F	47.5°F
Jan 16	47.1°F	47.7°F	47.3°F
Jan 17	46.9°F	47.7°F	47.4°F
Jan 18	47.1°F	47.6°F	47.5°F
Jan 19	47.0°F	47.6°F	47.6°F
Jan 20	47.0°F	47.5°F	47.7°F
Jan 21	47.0°F	47.3°F	47.6°F
Jan 22	47.1°F	47.2°F	47.7°F
Jan 23	47.1°F	47.2°F	47.7°F
Jan 24	47.0°F	48.0°F	47.7°F
Jan 25	47.0°F	47.9°F	47.6°F
Jan 26	47.1°F	47.9°F	47.7°F
Jan 27	47.0°F	47.6°F	47.6°F
Jan 28	46.8°F	47.3°F	47.4°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 47.8°F in Winter, 49.6°F in Spring, 57.1°F in Summer, and 54.4°F in Autumn.