National Weather Service Forecast for: Arcata CA
Issued by: National Weather Service Eureka, CA
Updated: 2:10 am PDT Jun 22, 2026
 
Overnight

Overnight: Patchy fog after 5am. Otherwise, cloudy, with a low around 51. Light south wind.
Patchy Fog

 Monday

Monday: Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 62. Calm wind becoming west around 5 mph in the afternoon.
Patchy Fog
then Mostly
Sunny
 Monday
Night
Monday Night: Patchy fog after 2am. Otherwise, increasing clouds, with a low around 53. West northwest wind around 6 mph becoming calm in the evening.
Mostly Cloudy
then Patchy
Fog
 Tuesday

Tuesday: Patchy fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 63. Calm wind becoming west northwest around 6 mph in the afternoon.
Patchy Fog
then Mostly
Sunny
 Tuesday
Night
Tuesday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 54. Northwest wind around 6 mph becoming calm in the evening.
Patchy Fog

 Wednesday

Wednesday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 63. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Patchy Fog
then Sunny
 Wednesday
Night
Wednesday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 52.
Patchy Fog

 Thursday

Thursday: Patchy fog before 8am. Otherwise, partly sunny, with a high near 60.
Patchy Fog
then Partly
Sunny
 Thursday
Night
Thursday Night: Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 52.
Mostly Cloudy
then Patchy
Fog
Lo 51 °F Hi 62 °F Lo 53 °F Hi 63 °F Lo 54 °F Hi 63 °F Lo 52 °F Hi 60 °F Lo 52 °F

 

Overnight
 
 Patchy fog after 5am. Otherwise, cloudy, with a low around 51. Light south wind.
Monday
 
 Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 62. Calm wind becoming west around 5 mph in the afternoon.
Monday Night
 
 Patchy fog after 2am. Otherwise, increasing clouds, with a low around 53. West northwest wind around 6 mph becoming calm in the evening.
Tuesday
 
 Patchy fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 63. Calm wind becoming west northwest around 6 mph in the afternoon.
Tuesday Night
 
 Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 54. Northwest wind around 6 mph becoming calm in the evening.
Wednesday
 
 Patchy fog before 8am. Otherwise, mostly sunny, with a high near 63. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Wednesday Night
 
 Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 52.
Thursday
 
 Patchy fog before 8am. Otherwise, partly sunny, with a high near 60.
Thursday Night
 
 Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 52.
Friday
 
 A slight chance of rain. Cloudy, with a high near 60.
Friday Night
 
 A chance of rain. Mostly cloudy, with a low around 53.
Saturday
 
 Partly sunny, with a high near 59.
Saturday Night
 
 Mostly clear, with a low around 50.
Sunday
 
 Mostly sunny, with a high near 60. Breezy.

 

Forecast from NOAA-NWS for Arcata CA.