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Arcata, CA Marine Weather Forecast

Tonight - 53°F
Aug 18, 2026
0 to 3 mph W
Mostly Cloudy then Areas Of Fog
Areas of fog after 5am. Mostly cloudy, with a low around 53. West wind 0 to 3 mph.
Tuesday - 63°F
Aug 18, 2026
0 to 7 mph NW
Areas Of Fog then Mostly Cloudy
Areas of fog before 8am. Mostly cloudy, with a high near 63. Northwest wind 0 to 7 mph.
Tuesday Night - 54°F
Aug 18, 2026
1 to 7 mph NW
Mostly Cloudy then Patchy Fog
Patchy fog after 2am. Mostly cloudy, with a low around 54. Northwest wind 1 to 7 mph.
Wednesday - 63°F
Aug 19, 2026
1 to 8 mph NNW
Patchy Fog then Mostly Cloudy
Patchy fog before 11am. Mostly cloudy, with a high near 63. North northwest wind 1 to 8 mph.
Wednesday Night - 54°F
Aug 19, 2026
1 to 8 mph NNW
Mostly Cloudy then Patchy Fog
Patchy fog after 5am. Mostly cloudy, with a low around 54. North northwest wind 1 to 8 mph.
Thursday - 63°F
Aug 20, 2026
1 to 7 mph NW
Patchy Fog then Mostly Cloudy
Patchy fog before 11am. Mostly cloudy, with a high near 63. Northwest wind 1 to 7 mph.
Thursday Night - 54°F
Aug 20, 2026
1 to 6 mph NNW
Patchy Fog
Patchy fog after 11pm. Cloudy, with a low around 54.
Friday - 59°F
Aug 21, 2026
1 to 7 mph NNW
Patchy Fog then Mostly Cloudy
Patchy fog before 11am. Mostly cloudy, with a high near 59.
Friday Night - 54°F
Aug 21, 2026
2 to 6 mph N
Mostly Cloudy
Mostly cloudy, with a low around 54.
Saturday - 60°F
Aug 22, 2026
2 to 10 mph N
Partly Sunny
Partly sunny, with a high near 60.
Saturday Night - 55°F
Aug 22, 2026
2 to 10 mph N
Mostly Cloudy
Mostly cloudy, with a low around 55.
Sunday - 62°F
Aug 23, 2026
2 to 8 mph NNW
Partly Sunny
Partly sunny, with a high near 62.
Sunday Night - 55°F
Aug 23, 2026
1 to 8 mph NNW
Mostly Cloudy then Patchy Fog
Patchy fog after 5am. Mostly cloudy, with a low around 55.
Monday - 61°F
Aug 24, 2026
1 to 8 mph NNW
Patchy Fog then Mostly Cloudy
Patchy fog before 11am. Mostly cloudy, with a high near 61.

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