National Weather Service Forecast for: Arcata CA
Issued by: National Weather Service Eureka, CA
Updated: 2:10 pm PDT Jul 12, 2026
 
Tonight

Tonight: Patchy fog before 2am, then patchy fog after 5am. Otherwise, increasing clouds, with a low around 52. North northwest wind 5 to 9 mph becoming calm in the evening.
Patchy Fog

 Monday

Monday: Patchy fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 62. Calm wind becoming northwest 5 to 8 mph in the afternoon.
Patchy Fog
then Partly
Sunny
 Monday
Night
Monday Night: Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 52. North northwest wind 3 to 8 mph.
Patchy Fog

 Tuesday

Tuesday: Patchy fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 62. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Patchy Fog
then Partly
Sunny
 Tuesday
Night
Tuesday Night: Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 52. Northwest wind 5 to 7 mph becoming calm in the evening.
Patchy Fog

 Wednesday

Wednesday: Patchy fog before 8am. Otherwise, partly sunny, with a high near 61. Calm wind becoming northwest 5 to 8 mph in the afternoon.
Patchy Fog
then Partly
Sunny
 Wednesday
Night
Wednesday Night: Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 52.
Partly Cloudy
then Patchy
Fog
 Thursday

Thursday: Patchy fog before 8am. Otherwise, partly sunny, with a high near 61.
Patchy Fog
then Partly
Sunny
 Thursday
Night
Thursday Night: Areas of fog after 2am. Otherwise, mostly cloudy, with a low around 52.
Partly Cloudy
then Areas
Fog
Lo 52 °F Hi 62 °F Lo 52 °F Hi 62 °F Lo 52 °F Hi 61 °F Lo 52 °F Hi 61 °F Lo 52 °F

Coastal Flood Advisory
 

Tonight
 
 Patchy fog before 2am, then patchy fog after 5am. Otherwise, increasing clouds, with a low around 52. North northwest wind 5 to 9 mph becoming calm in the evening.
Monday
 
 Patchy fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 62. Calm wind becoming northwest 5 to 8 mph in the afternoon.
Monday Night
 
 Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 52. North northwest wind 3 to 8 mph.
Tuesday
 
 Patchy fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 62. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Tuesday Night
 
 Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 52. Northwest wind 5 to 7 mph becoming calm in the evening.
Wednesday
 
 Patchy fog before 8am. Otherwise, partly sunny, with a high near 61. Calm wind becoming northwest 5 to 8 mph in the afternoon.
Wednesday Night
 
 Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 52.
Thursday
 
 Patchy fog before 8am. Otherwise, partly sunny, with a high near 61.
Thursday Night
 
 Areas of fog after 2am. Otherwise, mostly cloudy, with a low around 52.
Friday
 
 Areas of fog before 11am. Otherwise, partly sunny, with a high near 63.
Friday Night
 
 Patchy fog. Otherwise, mostly cloudy, with a low around 54.
Saturday
 
 Patchy fog. Otherwise, mostly cloudy, with a high near 63.
Saturday Night
 
 Patchy fog. Otherwise, mostly cloudy, with a low around 55.
Sunday
 
 Mostly cloudy, with a high near 63.

 

Forecast from NOAA-NWS for Arcata CA.