National Weather Service Forecast for: Eureka CA
Issued by: National Weather Service Eureka, CA
Updated: 2:46 pm PDT Aug 19, 2026
 
Overnight

Overnight: Patchy fog. Otherwise, cloudy, with a low around 55. Calm wind.
Patchy Fog

 Thursday

Thursday: Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 64. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Patchy Fog
then Mostly
Cloudy
 Thursday
Night
Thursday Night: Patchy fog after 8pm. Otherwise, cloudy, with a low around 54. North northwest wind around 5 mph becoming calm in the evening.
Patchy Fog

 Friday

Friday: Areas of fog before 11am. Otherwise, mostly cloudy, with a high near 64. Calm wind becoming west northwest around 6 mph in the afternoon.
Areas Fog
then Mostly
Cloudy
 Friday
Night
Friday Night: Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 53. Northwest wind around 5 mph becoming calm in the evening.
Patchy Fog

 Saturday

Saturday: Areas of fog before 11am. Otherwise, partly sunny, with a high near 65. Calm wind becoming northwest 5 to 8 mph in the afternoon.
Areas Fog
then Mostly
Sunny
 Saturday
Night
Saturday Night: Mostly cloudy, with a low around 54.
Mostly Cloudy

 Sunday

Sunday: Partly sunny, with a high near 67.
Partly Sunny

 Sunday
Night
Sunday Night: Mostly cloudy, with a low around 56.
Mostly Cloudy
Lo 55 °F Hi 64 °F Lo 54 °F Hi 64 °F Lo 53 °F Hi 65 °F Lo 54 °F Hi 67 °F Lo 56 °F

 

Overnight
 
 Patchy fog. Otherwise, cloudy, with a low around 55. Calm wind.
Thursday
 
 Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 64. Calm wind becoming northwest 5 to 7 mph in the afternoon.
Thursday Night
 
 Patchy fog after 8pm. Otherwise, cloudy, with a low around 54. North northwest wind around 5 mph becoming calm in the evening.
Friday
 
 Areas of fog before 11am. Otherwise, mostly cloudy, with a high near 64. Calm wind becoming west northwest around 6 mph in the afternoon.
Friday Night
 
 Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 53. Northwest wind around 5 mph becoming calm in the evening.
Saturday
 
 Areas of fog before 11am. Otherwise, partly sunny, with a high near 65. Calm wind becoming northwest 5 to 8 mph in the afternoon.
Saturday Night
 
 Mostly cloudy, with a low around 54.
Sunday
 
 Partly sunny, with a high near 67.
Sunday Night
 
 Mostly cloudy, with a low around 56.
Monday
 
 Mostly cloudy, with a high near 66.
Monday Night
 
 Patchy fog. Otherwise, mostly cloudy, with a low around 55.
Tuesday
 
 Patchy fog. Otherwise, mostly cloudy, with a high near 65.
Tuesday Night
 
 Patchy fog. Otherwise, mostly cloudy, with a low around 54.
Wednesday
 
 Patchy fog. Otherwise, mostly cloudy, with a high near 65.

 

Forecast from NOAA-NWS for Eureka CA.