National Weather Service United States Department of Commerce

Check Water Temperatures Before Your River Visit

Water temperatures below 70 degrees causes you to lose breathing & muscle control which can lead to drowning. The colder the water the more extreme the impacts. Enjoy the river by staying dry when water is cold. Read More >

Eureka, CA

Weather Forecast Office

NWS Forecast Office Eureka, CA

Weather.gov > Eureka, CA
Click a location below for detailed forecast.

Last Map Update: Thu, Jun 11, 2026 at 7:38:23 am PDT

Heat Advisory
Red Flag Warning
A Heat Advisory has been issued for Lake & Interior Mendocino Counties Today & Friday. High temperatures in the triple digits are possible in many valley locations. Above normal temperatures are likely to continue into early next week.
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A Red Flag Warning has been issued for southeastern Lake County starting at 11 PM tonight to 8 AM Thursday. Gusty north-northeast winds, low relative humidity, and relatively dry fuels will create elevated fire weather conditions. Any fires that develop are likely to spread rapidly.
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