Eureka, CA Weather & Growing Conditions
Today
70°F
Patchy Smoke
Patchy smoke. Sunny, with a high near 70. Southwest wind 6 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 70°F | Patchy Smoke | 6 to 10 mph SW | 0% |
| Tonight | 58°F | Patchy Smoke then Patchy Fog | 1 to 7 mph SSW | 0% |
| Wednesday | 70°F | Patchy Fog then Mostly Sunny | 1 to 6 mph W | 0% |
| Wednesday Night | 56°F | Partly Cloudy | 1 to 5 mph NNW | 0% |
| Thursday | 69°F | Mostly Sunny | 1 to 6 mph NW | 0% |
| Thursday Night | 55°F | Mostly Cloudy | 1 to 5 mph NNW | 1% |
| Friday | 69°F | Mostly Sunny | 1 to 7 mph NNW | 0% |
| Friday Night | 56°F | Partly Cloudy | 0 to 6 mph NW | 0% |
| Saturday | 68°F | Mostly Sunny | 0 to 9 mph NNW | 1% |
| Saturday Night | 55°F | Partly Cloudy | 2 to 9 mph NNW | 1% |
| Sunday | 66°F | Mostly Sunny | 2 to 10 mph NNW | 0% |
| Sunday Night | 54°F | Partly Cloudy | 2 to 10 mph NNW | 0% |
| Monday | 65°F | Mostly Sunny | 2 to 10 mph NNW | 0% |
| Monday Night | 54°F | Partly Cloudy then Patchy Fog | 1 to 10 mph NNW | 1% |
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 Aug 4, 2026.