Interagency Ecological Program Spring Season report
- Water temperature is monitored monthly by DWR’s Environmental Monitoring Program.
- Fish growth and reproduction is highest in certain temperature ranges.
- Increasing Spring temperatures may lower Delta Smelt reproduction.
- Spring temperatures are lower closer to the ocean and slightly higher in the Delta.
Temperature by Region
In 2018, San Pablo Bay temperatures were similar to the long-term average.
In 2018, Suisun Bay was similar to the long-term average.
In 2018, the Delta was slightly cooler than average.
For more information see: Jeffries, et al.. 2016. Effects of high temperatures on threatened estuarine fishes during periods of extreme drought. The Journal of Experimental Biology 219(11):1705-1716.