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Friday Harbor, WA - San Juan Island Marine Weather Forecast

Station FRDW1 - 9449880 - Friday Harbor, WA

December 18, 2025 9:36 am PST
Location: 48.545N 123.012W
Wind Direction: SE (140°)
Wind Speed: 17.1 knots
Wind Gust: 22.9 knots
Atmospheric Pressure: 29.55 in (1000.7 mb)
Air Temperature: 44.4°F (6.9°C)
Water Temperature: 49.3°F (9.6°C)


Today - 50°F
Dec 18, 2025
17 to 24 mph S
Rain
Rain. Mostly cloudy. High near 50, with temperatures falling to around 48 in the afternoon. South wind 17 to 24 mph, with gusts as high as 46 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch possible.
Tonight - 39°F
Dec 18, 2025
7 to 17 mph WSW
Light Rain Likely
Rain likely. Partly cloudy. Low around 39, with temperatures rising to around 41 overnight. West southwest wind 7 to 17 mph, with gusts as high as 43 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
Friday - 45°F
Dec 19, 2025
8 mph SW
Light Rain
Rain. Mostly cloudy. High near 45, with temperatures falling to around 43 in the afternoon. Southwest wind around 8 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
Friday Night - 39°F
Dec 19, 2025
8 mph SW
Light Rain
Rain. Mostly cloudy, with a low around 39. Southwest wind around 8 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
Saturday - 46°F
Dec 20, 2025
8 mph S
Light Rain
Rain. Mostly cloudy, with a high near 46. South wind around 8 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
Saturday Night - 39°F
Dec 20, 2025
7 mph SSE
Light Rain
Rain. Mostly cloudy, with a low around 39. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
Sunday - 46°F
Dec 21, 2025
7 to 10 mph SSE
Light Rain
Rain. Cloudy, with a high near 46.
Sunday Night - 39°F
Dec 21, 2025
7 mph S
Light Rain
Rain. Cloudy, with a low around 39.
Monday - 46°F
Dec 22, 2025
7 to 10 mph SSE
Light Rain
Rain. Cloudy, with a high near 46.
Monday Night - 38°F
Dec 22, 2025
9 mph S
Light Rain
Rain. Mostly cloudy, with a low around 38.
Tuesday - 46°F
Dec 23, 2025
8 mph SSE
Light Rain Likely
Rain likely. Partly sunny, with a high near 46.
Tuesday Night - 36°F
Dec 23, 2025
6 mph E
Chance Light Rain
A chance of rain. Mostly cloudy, with a low around 36.
Wednesday - 44°F
Dec 24, 2025
7 mph N
Chance Light Rain
A chance of rain. Mostly cloudy, with a high near 44.
Wednesday Night - 37°F
Dec 24, 2025
6 mph ENE
Chance Light Rain
A chance of rain. Mostly cloudy, with a low around 37.

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