California Department of Water Resources

The Thermalito Forebay provides a unique recreation experience compared to other geographic areas of the Lake Oroville State Recreation Area. Its relatively stable water elevation level, proximity to City of Oroville amenities, and developed day-use facilities provide an experience that is much different from Lake Oroville. Learn more about recreation opportunities at the North and South Thermalito Forebay day-use areas in the Lake Oroville Community Update https://water.ca.gov/News/Blog/2026/Jun-2026/Lake-Oroville-Update-June-3-2026

Pyramid Lake, Castaic Lake, and Castaic Lagoon in Los Angeles County have a caution advisories. Keep yourself and pets away from algal blooms.

For more, go to https://water.ca.gov/What-We-Do/Recreation/Algal-Blooms

One sign that the blue-green algae may be a Harmful Algal Bloom (HAB) is smell. HABs can produce toxins that can make people & animals sick. DWR urges you to avoid contact with algal blooms and follow posted HAB advisories. You can find more information at https://water.ca.gov/What-We-Do/Recreation/Algal-Blooms

Blue-green algae can be present in California’s reservoirs. One sign that the blue-green algae has become a Harmful Algal Bloom (HAB) is color. HABs can produce toxins that can make people & animals sick. More info on HABs at https://water.ca.gov/What-We-Do/Recreation/Algal-Blooms

Lake Oroville is at 895 feet elevation and storage is approximately 3.35 million acre-feet (MAF), which is 98% of its total capacity and 119% of the historical average.

Feather River flows are at 650 cubic feet per second (cfs) through the City of Oroville with releases from the Thermalito Afterbay River Outlet at 2,350 cfs for a total Feather River release of 3,000 cfs downstream. DWR continues to assess Feather River releases daily.

To read more on Lake Oroville, please visit:

https://water.ca.gov/News/Blog/2026/May-2026/Lake-Oroville-Update-May-29-2026

If you're spending time on waterways this summer, remember to stay away from algae. Certain types produce toxins that can make people & animals sick. Harmful Algal Bloom (HAB) advisories for State Water Project lakes are posted each week during the summer season. More ➡️ https://water.ca.gov/What-We-Do/Recreation/Algal-Blooms

Drivers can expect traffic shifts and lane closures on Ramona Expressway and Lake Perris Drive from 6 p.m. to 6 a.m. on May 27-28 as part of the ongoing work for the Lake Perris Emergency Release Facility Project in Riverside County. Learn more about the project’s new infrastructure improvements that will provide additional protection for downstream communities at https://tinyurl.com/y2vuwvem

Even an unseasonably warm winter creates snowmelt on our state’s waterways. To stay safe, remember to always swim with a buddy. Your buddy can call for help if you get in trouble. You’ll also have more fun with a partner!