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, Jul 4, 2026 at 1:48:31 pm PDT

Watches, Warnings & Advisories

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National Weather Service San Francisco Bay Area, CA

Small Craft Advisory

Hazardous Seas Warning

July 4th Forecast

Wear a Life Jacket

Happy 4th of July! Mostly clear skies are likely outside of the coastal areas this evening. High temperatures in the 90s quickly drop into high 60s to mid 70s in the evening. Low clouds and patchy fog increase in the evening along the coast.

Sending a friendly reminder that wearing a life jacket will make your river visit safer. Even though summer is here, rivers can remain hazardous all year long. Hidden hazardous like submerged trees, rocks, and unexpected currents can make jumping off high rocks or swimming across the river dangerous.