Point Forecast: 18NM NW Seattle WA
 47.82N 122.67W (Elev. 0 m)
Last Update: 8:01 pm PDT Mar 11, 2026
Tabular Forecast
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Weather ElementsWeather/PrecipitationMarine Weather
Temperature (°C)
Dewpoint (°C)
Wind Chill (°C)

Surface Wind  
Sky Cover (%)
Precipitation Potential (%)
Relative Humidity (%)
Rain
Thunder
Snow
Freezing Rain
Sleet
Freezing Spray
Fog
Swell Period
Swell Hgt/Dir
Swell 2 Period
Swell 2 Hgt/Dir
Wind Wave Height
Significant Wave Height
Freezing Spray

48-Hour Period Starting:       Back 2 Days  

Date03/1203/13
Hour (PDT)010203040506070809101112131415161718192021222300
Surface Wind (kt)11810888776667777744433322
Wind DirWSSESSSENSSESSESSSSSWSENNENNENNNEENEESESSESSESSS
Gust
Significant Wave Height (m) 000000000000000000000000
Swell Height (m)
Swell Dir
Swell Period (sec)
Swell 2 Height (m)
Swell 2 Dir
Swell 2 Period (sec) 777777777776666666666666
Wind Wave Height (m)

Date03/14
Hour (PDT)010203040506070809101112131415161718192021222300
Surface Wind (kt)211111111122222222211111
Wind DirSSSSSSSSSESSESSESESESEEEENENENENNNNWNW
Gust
Significant Wave Height (m) 000000000000000000000000
Swell Height (m)
Swell Dir
Swell Period (sec)
Swell 2 Height (m)
Swell 2 Dir
Swell 2 Period (sec) 555550000004555000000000
Wind Wave Height (m)

Additional Forecasts and Information
English UnitsForecast Discussion
Marine Point ForecastHourly Weather Graph
National Marine ForecastsTide Information
NWS GIS Viewer (previously user-defined area forecast)