Eureka, CA – Humboldt County residents can expect a warm, bright Sunday before nighttime fog creeps back into the region. Afternoon highs will top out near 70°F, offering a comfortable close to the weekend. Light west-southwest winds near 6 mph will keep conditions pleasant for outdoor plans from Arcata to Fortuna.
According to the National Weather Service in Eureka, patchy fog is likely to develop after 8 p.m. Sunday, reducing visibility in coastal neighborhoods and along U.S. Highway 101. Winds will shift west-northwest at 6 mph before calming overnight, with lows dipping to around 58°F. Drivers should be prepared for foggy stretches into Monday morning.
The mild pattern continues into early next week, with Monday bringing mostly sunny skies and highs in the upper 60s. Evening clouds are expected to increase Tuesday night, signaling a cooler, cloudier midweek. This stretch offers an ideal opportunity for late-summer outdoor dining, hiking local trails, or visiting the Eureka Waterfront before conditions turn grayer.
Five Day Forecast for Eureka, CA:
- Sunday: Mostly sunny, high 70°F, low 58°F, patchy fog late.
- Monday: Patchy morning fog, then mostly sunny, high 68°F, low 55°F.
- Tuesday: Partly sunny, high 66°F, low 55°F.
- Wednesday: Mostly cloudy, high 63°F, low 55°F.
- Thursday: Partly sunny, high 64°F, low 54°F.




