Thermalito Forebay water level & water temperature
Thermalito Forebay water level isn't currently wired to a public live source — the dashboard runs weather-only for this lake. Full pool elevation is 225 ft; surface area at full pool is 300 acres.
No reliable water-level source yet
We haven't found a public, reliable elevation feed for Thermalito Forebay, so we won't show a level we can't stand behind. Weather, wind models, and the sailing score all still work.
Help us add it
Know a source for Thermalito Forebay? Email us any of these and we'll wire it up:
- 1Source / operating agency
- 2Gauge ID or data URL
- 3Anything else worth knowing
Water Temperature
Thermalito Forebay water temperature by month
Thermalito Forebay surface water temperature averages from about 49°F in January to 80°F in August over the year, based on a 40-year USGS model (1980–2020). Cold-water caution applies in January, February, March, November and December, when the typical temperature is below 60°F.
Typical surface temperatures (°F), modeled historical averages (USGS 185k-lake dataset, 1980–2020). Colors flag cold-water risk: blue/amber/red = cool, caution, danger. Live and recent readings appear above where a sensor is available.