Flood Protection
Weather Gages
Weather Gages

Weather and Tides

High tidesFor the latest rain update, check the National Weather Service's precipitation outlook. 

Track the latest on El Nino at NOAA's Climate Protection Center

See NOAA's Tides & Currents website for the latest tide information.

Upcoming 2017 dates with tides predicted to be at or above 6.5 ft. include: 

December 29-31

Upcoming 2018 dates with tides predicted to be at or above 6.5 ft. include: 

January 1-4
January 28-February 1
February 28
June 11-16
July 9-15
August 7-13
September 6-10
November 23-25
December 5
December 20-25


Real Time Precipitation and Stream Gages

One Rain map

The District operates and maintains 2 full weather stations (rainfall, temperature, barometric pressure, etc.), 4 stream gaging stations and 4 precipitation gages in Marin County. Placed in strategic locations, they allow us to track the intensity of winter storms as they approach and monitor the effects of the storms in critical areas. These stations provide real-time weather data, via radio transmissions, to our receiver on Mt Tam. From Mt Tam the data is transmitted through an internet connection to a OneRain cloud server and displayed on the Marin County OneRain website. Data is recorded and provided as historic data through the website. You can see the location of these stations by clicking the "Maps" link on the menu on the left panel. 

Additionally, the OneRain website contains links to data from important sites that can be used to track and plan for flood events. Weather links, tides, and other relevant information are available.

OneRain website link

Upgrades to County Rain and Stream Gages

Rain GaugeThe District has received a Flood Emergency Response Program (FERP) Grant to upgrade all nine of its existing stream and rain gages to ALERT2 protocols. Also under this grant, the District’s rain and stream gage network will be expanded and will include new sites in Zone 1 – Novato, Zone 3 – Mill Valley, Zone 4 – Bel Aire (Tiburon), Zone 9 - Ross Valley, and one at the Civic Center near Zones 6 and 7 – Santa Venetia, Rafael Meadows and Redwood Village.  This will improve available data for studies and situational awareness in storms. 

View current rainfall totals.


The District makes no representation or warranty, express or implied, with respect to data accuracy, completeness, timeliness, reliability, quality, or usefulness. Data are provided “as-is” and should not be relied upon for making critical decisions. The District assumes no liability for any damage to or loss of property, or personal injury or loss of life, which may arise out of use of data.