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 >

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Last Map Update: Sat, Jun 13, 2026 at 1:44:16 pm PDT

Watches, Warnings & Advisories

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National Weather Service San Francisco Bay Area, CA

Extreme Heat Warning

Gale Warning

Heat Advisory

Coastal Flood Advisory

Small Craft Advisory

Beach Hazards Statement

Heat Advisory

Coastal Flooding

Cold Rivers

Heat Advisories have been issued for portions of the interior through Tuesday. High temperatures near or above 100 are possible in many interior valley locations through Tuesday.

Weather may be getting hotter, but rivers are still cold. Don't let rivers fool you this weekend. Cold water is dangerous for swimming. It can cause you to lose control of your breathing and also the muscles you need to swim. Check the water temps to see if it's too cold for swimming. Enjoy your river visit by wearing a life jacket or plan on not swimming.