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, May 21, 2026 at 2:20:14 pm PDT

Holiday Weekend Outlook
Cold Rivers
Winds turn much lighter over the weekend, but strengthen Monday afternoon. Temperatures will be mild and pleasant. Low clouds and some fog will increase along the coast. Only a slight chance for mainly drizzle late Monday for the Far North Coast.
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Weather may be warming up but river temperatures remain cold this time year. Cold water can impact your breathing and hinder your ability to swim. Most rivers are 60 degrees or colder, which makes swimming dangerous. Stay safe during your river visit by staying dry.
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