Washington: water temperature

At sea, 11.8 °C on average across 21 stations, from 9.5 °C (Angeles Point, WA) to 14.1 °C (Astoria Canyon, OR (179)). In fresh water, 9.5 °C on average across 71 stations, from 3.9 °C (Andrews Creek Near Mazama, WA) to 16.4 °C (Columbia River At Bridgeport, WA).

See on the map

Sea and ocean

Lakes and rivers

Where to swim, month by month

The normal sea temperature each month along the coast: pick a month to see where the water is warmest and whether you can swim.

• January 9.2 °C · up to 9.7 °C
• February 9.0 °C · up to 9.5 °C
• March 9.0 °C · up to 9.4 °C
• April 9.9 °C · up to 10.2 °C
• May 11.8 °C · up to 12.4 °C
• June 12.7 °C · up to 13.8 °C
• July 14.2 °C · up to 15.6 °C
• August 14.7 °C · up to 16.5 °C
• September 14.4 °C · up to 16.1 °C
• October 13.1 °C · up to 14.4 °C
• November 11.3 °C · up to 12.1 °C
• December 9.9 °C · up to 10.4 °C

Warmest water today

Where these numbers come from

Every value is a real reading from an instrument, at its position: a buoy, a wharf, a river or lake station. It keeps the time it was measured. A reading too far from those of nearby stations is marked with a “?”. Between stations, the map gives a satellite or model estimate, always labelled as such.

Sources: Bouées de houle CDIP, NOAA CO-OPS, NOAA NDBC, USGS, eaux des États-Unis. Sources and credits

Nearby

• Oregon 215 stations · sea 12.0 °C · fresh water 10.0 °C
• Idaho 23 stations · fresh water 9.6 °C
• Montana 56 stations · fresh water 7.1 °C
• Nevada 12 stations · fresh water 12.9 °C
• Wyoming 25 stations · fresh water 8.1 °C
• Utah 23 stations · fresh water 10.7 °C