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Roche Harbor, WA - San Juan Island Marine Weather Forecast

Station FRDW1 - 9449880 - Friday Harbor, WA

December 28, 2025 3:36 pm PST
Location: 48.545N 123.012W
Wind Direction: ENE (60°)
Wind Speed: 5.1 knots
Wind Gust: 6.0 knots
Atmospheric Pressure: 30.66 in (1038.2 mb)
Air Temperature: 40.1°F (4.5°C)
Water Temperature: 48.2°F (9.0°C)


This Afternoon - 41°F
Dec 28, 2025
3 mph ESE
Mostly Cloudy
Mostly cloudy, with a high near 41. East southeast wind around 3 mph.
Tonight - 37°F
Dec 28, 2025
2 mph ENE
Mostly Cloudy
Mostly cloudy. Low around 37, with temperatures rising to around 39 overnight. East northeast wind around 2 mph.
Monday - 44°F
Dec 29, 2025
3 mph N
Mostly Cloudy
Mostly cloudy, with a high near 44. North wind around 3 mph.
Monday Night - 38°F
Dec 29, 2025
2 mph N
Mostly Cloudy then Patchy Fog
Patchy fog between 4am and 5am. Mostly cloudy, with a low around 38. North wind around 2 mph.
Tuesday - 44°F
Dec 30, 2025
2 mph NNE
Patchy Fog then Mostly Cloudy
Patchy fog between 8am and 11am. Mostly cloudy, with a high near 44. North northeast wind around 2 mph.
Tuesday Night - 38°F
Dec 30, 2025
2 mph ENE
Mostly Cloudy
Mostly cloudy, with a low around 38.
Wednesday - 45°F
Dec 31, 2025
2 mph E
Patchy Fog then Mostly Cloudy
Patchy fog between 9am and 10am. Mostly cloudy, with a high near 45.
Wednesday Night - 39°F
Dec 31, 2025
2 mph NE
Mostly Cloudy then Slight Chance Light Rain
A slight chance of rain after 4am. Mostly cloudy, with a low around 39.
New Year's Day - 46°F
Jan 01, 2026
5 mph ESE
Chance Light Rain
A chance of rain. Cloudy, with a high near 46.
Thursday Night - 41°F
Jan 01, 2026
5 mph SSE
Chance Light Rain
A chance of rain. Mostly cloudy, with a low around 41.
Friday - 47°F
Jan 02, 2026
6 mph S
Chance Light Rain
A chance of rain. Mostly cloudy, with a high near 47.
Friday Night - 40°F
Jan 02, 2026
5 mph SSW
Chance Light Rain
A chance of rain. Mostly cloudy, with a low around 40.
Saturday - 46°F
Jan 03, 2026
3 to 7 mph SE
Chance Light Rain
A chance of rain. Mostly cloudy, with a high near 46.
Saturday Night - 40°F
Jan 03, 2026
5 mph SE
Chance Light Rain
A chance of rain. Mostly cloudy, with a low around 40.

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