National Weather Service Forecast for: Arcata CA
Issued by: National Weather Service Eureka, CA
Updated: 1:10 pm PST Dec 4, 2025
 
Tonight

Tonight: A slight chance of drizzle. Patchy fog. Otherwise, cloudy, with a low around 45. Calm wind.
Slight Chance
Drizzle and
Patchy Fog
 Friday

Friday: A chance of drizzle, mainly after 10am. Areas of fog before 1pm. Otherwise, mostly cloudy, with a high near 58. Calm wind becoming north northwest around 6 mph in the afternoon.
Chance
Drizzle and
Areas Fog
 Friday
Night
Friday Night: A 50 percent chance of rain. Areas of fog after 7pm. Otherwise, cloudy, with a low around 51. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Chance Rain
and Areas Fog

 Saturday

Saturday: A 30 percent chance of rain, mainly before 4pm. Patchy fog before 1pm. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 57. Calm wind.
Chance Rain
and Patchy
Fog
 Saturday
Night
Saturday Night: A 30 percent chance of rain, mainly after 10pm. Patchy fog between 7pm and 1am. Otherwise, mostly cloudy, with a low around 48. Calm wind.
Chance Rain
and Patchy
Fog
 Sunday

Sunday: A 50 percent chance of rain. Cloudy, with a high near 58. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Chance Rain

 Sunday
Night
Sunday Night: A 30 percent chance of rain before 10pm. Patchy fog before 10pm. Otherwise, mostly cloudy, with a low around 48.
Chance Rain
and Patchy
Fog then
Mostly Cloudy
 Monday

Monday: Mostly cloudy, with a high near 60.
Mostly Cloudy

 Monday
Night
Monday Night: Patchy fog before 10pm. Otherwise, mostly cloudy, with a low around 48.
Patchy Fog
then Mostly
Cloudy
Lo 45 °F Hi 58 °F Lo 51 °F Hi 57 °F Lo 48 °F Hi 58 °F Lo 48 °F Hi 60 °F Lo 48 °F

Coastal Flood Advisory
 

Tonight
 
 A slight chance of drizzle. Patchy fog. Otherwise, cloudy, with a low around 45. Calm wind.
Friday
 
 A chance of drizzle, mainly after 10am. Areas of fog before 1pm. Otherwise, mostly cloudy, with a high near 58. Calm wind becoming north northwest around 6 mph in the afternoon.
Friday Night
 
 A 50 percent chance of rain. Areas of fog after 7pm. Otherwise, cloudy, with a low around 51. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Saturday
 
 A 30 percent chance of rain, mainly before 4pm. Patchy fog before 1pm. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 57. Calm wind.
Saturday Night
 
 A 30 percent chance of rain, mainly after 10pm. Patchy fog between 7pm and 1am. Otherwise, mostly cloudy, with a low around 48. Calm wind.
Sunday
 
 A 50 percent chance of rain. Cloudy, with a high near 58. Calm wind. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
 
 A 30 percent chance of rain before 10pm. Patchy fog before 10pm. Otherwise, mostly cloudy, with a low around 48.
Monday
 
 Mostly cloudy, with a high near 60.
Monday Night
 
 Patchy fog before 10pm. Otherwise, mostly cloudy, with a low around 48.
Tuesday
 
 A chance of rain after 10am. Mostly cloudy, with a high near 60.
Tuesday Night
 
 A chance of rain. Mostly cloudy, with a low around 50.
Wednesday
 
 A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a high near 60.
Wednesday Night
 
 A slight chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 49.
Thursday
 
 A slight chance of rain. Patchy fog. Otherwise, partly sunny, with a high near 59.

 

Forecast from NOAA-NWS for Arcata CA.