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Knappa, OR - Knappa Slough Marine Weather Forecast

Tonight - 38°F
Dec 28, 2025
3 mph ESE
Partly Cloudy
Partly cloudy, with a low around 38. East southeast wind around 3 mph.
Sunday - 45°F
Dec 28, 2025
5 mph E
Partly Sunny
Partly sunny. High near 45, with temperatures falling to around 43 in the afternoon. East wind around 5 mph.
Sunday Night - 39°F
Dec 28, 2025
7 mph E
Mostly Cloudy
Mostly cloudy, with a low around 39. East wind around 7 mph.
Monday - 49°F
Dec 29, 2025
7 mph E
Partly Sunny
Partly sunny, with a high near 49. East wind around 7 mph.
Monday Night - 38°F
Dec 29, 2025
7 mph E
Mostly Cloudy
Mostly cloudy, with a low around 38. East wind around 7 mph.
Tuesday - 49°F
Dec 30, 2025
6 mph E
Partly Sunny
Partly sunny, with a high near 49.
Tuesday Night - 39°F
Dec 30, 2025
6 mph ESE
Mostly Cloudy
Mostly cloudy, with a low around 39.
Wednesday - 49°F
Dec 31, 2025
5 mph ESE
Partly Sunny then Slight Chance Light Rain
A slight chance of rain after 4pm. Partly sunny, with a high near 49.
Wednesday Night - 40°F
Dec 31, 2025
3 to 7 mph ESE
Chance Light Rain
A chance of rain. Mostly cloudy, with a low around 40.
New Year's Day - 49°F
Jan 01, 2026
8 mph SE
Light Rain
Rain. Mostly cloudy, with a high near 49.
Thursday Night - 42°F
Jan 01, 2026
9 mph SSE
Light Rain
Rain. Cloudy, with a low around 42.
Friday - 49°F
Jan 02, 2026
8 mph SW
Light Rain
Rain. Mostly cloudy, with a high near 49.
Friday Night - 40°F
Jan 02, 2026
8 mph SW
Light Rain Likely
Rain likely. Mostly cloudy, with a low around 40.
Saturday - 46°F
Jan 03, 2026
8 mph S
Light Rain Likely
Rain likely. Mostly cloudy, with a high near 46.

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