Eureka, CA Weather & Growing Conditions
Tonight
53°F
Mostly Cloudy
Mostly cloudy, with a low around 53. North northwest wind 3 to 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 53°F | Mostly Cloudy | 3 to 8 mph NNW | 3% |
| Saturday | 62°F | Mostly Cloudy | 3 to 9 mph NNW | 3% |
| Saturday Night | 53°F | Cloudy | 2 to 8 mph N | 2% |
| Sunday | 62°F | Mostly Cloudy | 2 to 7 mph NNW | 2% |
| Sunday Night | 53°F | Mostly Cloudy | 2 to 7 mph N | 2% |
| Monday | 64°F | Partly Sunny | 3 to 7 mph NNW | 0% |
| Monday Night | 54°F | Mostly Cloudy then Patchy Fog | 1 to 7 mph N | 0% |
| Tuesday | 63°F | Partly Sunny | 2 to 9 mph N | 0% |
| Tuesday Night | 52°F | Partly Cloudy | 2 to 9 mph N | 0% |
| Wednesday | 64°F | Mostly Sunny | 2 to 8 mph N | 0% |
| Wednesday Night | 53°F | Partly Cloudy | 1 to 7 mph N | 0% |
| Thursday | 65°F | Mostly Sunny | 1 to 6 mph N | 1% |
| Thursday Night | 54°F | Mostly Cloudy | 1 to 5 mph N | 3% |
| Friday | 63°F | Partly Sunny | 1 to 9 mph N | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Eureka, CA
Last spring frost
Feb 22
First fall frost
Dec 7
Growing season
293 days
Hardiness zone
9b
Explore more for Eureka, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Eureka Wfo Woodley Island, Ca (1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.