National Weather Service Forecast for: Arcata CA
Issued by: National Weather Service Eureka, CA
Updated: 2:10 am PDT Sep 13, 2026
 
Overnight

Overnight: Mostly cloudy, with a low around 53. Light south southeast wind.
Mostly Cloudy

 Sunday

Sunday: A 20 percent chance of rain before 11am. Partly sunny, with a high near 66. Calm wind becoming northwest 5 to 9 mph in the afternoon.
Slight Chance
Rain then
Mostly Sunny
 Sunday
Night
Sunday Night: Partly cloudy, with a low around 52. North northwest wind 5 to 10 mph becoming light north in the evening.
Partly Cloudy

 Monday

Monday: Mostly sunny, with a high near 66. Light north northeast wind becoming north northwest 6 to 11 mph in the afternoon. Winds could gust as high as 18 mph.
Mostly Sunny

 Monday
Night
Monday Night: Partly cloudy, with a low around 53. North northwest wind 5 to 10 mph becoming light and variable in the evening.
Partly Cloudy

 Tuesday

Tuesday: Mostly sunny, with a high near 66. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Mostly Sunny

 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 54.
Partly Cloudy

 Wednesday

Wednesday: Mostly sunny, with a high near 68.
Mostly Sunny

 Wednesday
Night
Wednesday Night: Mostly clear, with a low around 56.
Mostly Clear
Lo 53 °F Hi 66 °F Lo 52 °F Hi 66 °F Lo 53 °F Hi 66 °F Lo 54 °F Hi 68 °F Lo 56 °F

 

Overnight
 
 Mostly cloudy, with a low around 53. Light south southeast wind.
Sunday
 
 A 20 percent chance of rain before 11am. Partly sunny, with a high near 66. Calm wind becoming northwest 5 to 9 mph in the afternoon.
Sunday Night
 
 Partly cloudy, with a low around 52. North northwest wind 5 to 10 mph becoming light north in the evening.
Monday
 
 Mostly sunny, with a high near 66. Light north northeast wind becoming north northwest 6 to 11 mph in the afternoon. Winds could gust as high as 18 mph.
Monday Night
 
 Partly cloudy, with a low around 53. North northwest wind 5 to 10 mph becoming light and variable in the evening.
Tuesday
 
 Mostly sunny, with a high near 66. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Tuesday Night
 
 Partly cloudy, with a low around 54.
Wednesday
 
 Mostly sunny, with a high near 68.
Wednesday Night
 
 Mostly clear, with a low around 56.
Thursday
 
 Mostly sunny, with a high near 70.
Thursday Night
 
 Partly cloudy, with a low around 56.
Friday
 
 Partly sunny, with a high near 66.
Friday Night
 
 Areas of fog. Otherwise, mostly cloudy, with a low around 54.
Saturday
 
 Patchy fog. Otherwise, mostly cloudy, with a high near 63.

 

Forecast from NOAA-NWS for Arcata CA.