Lake Sonoma Water Level Today
California · near Geyserville · Below full pool
- Elevation
- 447.18 ft
- From full pool
- −3.92 ft
- Percent of pool
- 97.5%
- 24-hour change
- −0.08 ft
- 7-day change
- −0.64 ft
- Reading
- Sep 21, 2026 · USACE
Last year at Lake Sonoma
Lake Sonoma is 3.92 ft below full pool, at 447.18 ft, down 0.08 ft in the last 24 hours. That puts the lake at 97.5 percent of its conservation pool. The top of the flood pool is 53.8 ft higher, at 501.00 ft.
Over the last 7 days the level fell 0.64 ft, and over 30 days it fell 2.67 ft. In the 398 days of readings on this page the high was 464.43 ft on Jan 7, 2026 and the low was 440.62 ft on Dec 19, 2025, a range of 23.81 ft.
The reading is the U.S. Army Corps of Engineers gauge at Lake Sonoma / Warm Springs Dam, near Geyserville, taken Sep 21, 2026 and referenced to the NGVD29 datum. This page is rebuilt once a day from the agency feed; it is not a live gauge, so during a fast rise or a scheduled release check the USACE page for hourly values.
Lake Sonoma pool elevations
| Current elevation | 447.18 ft |
|---|---|
| Full pool (top of conservation) | 451.10 ft |
| Top of flood pool | 501.00 ft |
| Bottom of conservation pool | 292.00 ft |
| Top of dam | 519.00 ft |
| Inflow | -21 cfs |
| Outflow | 105 cfs |
| 30-day change | −2.67 ft |
| 1-year high | 464.43 ft (Jan 7, 2026) |
| 1-year low | 440.62 ft (Dec 19, 2025) |
| Vertical datum | NGVD29 |
| Operating agency | U.S. Army Corps of Engineers, SPN district |
Source: U.S. Army Corps of Engineers. Read what full pool and flood pool mean.
More lakes in California
- Lake Oroville 767.67 ft, −128.29 ft from full
- Shasta Lake 984.99 ft, −81.78 ft from full
- Folsom Lake 408.15 ft, −57.85 ft from full
- Lake Isabella 2,557.94 ft, −26.04 ft from full
- New Melones Lake 1,007.63 ft, −75.95 ft from full
- Pine Flat Lake 742.21 ft, −209.11 ft from full
Lake Sonoma level questions
What is the water level of Lake Sonoma today?
Lake Sonoma is at 447.18 ft as of Sep 21, 2026, −3.92 ft relative to full pool (451.10 ft). The 24-hour change is −0.08 ft.
What is full pool at Lake Sonoma?
Full pool, the top of the conservation pool, is 451.10 ft (NGVD29). Above that, water is stored temporarily in the flood pool up to 501.00 ft. The bottom of the conservation pool is 292.00 ft.
Is Lake Sonoma rising or falling?
Over the last 24 hours the level is −0.08 ft; over 7 days it fell 0.64 ft, and over 30 days it fell 2.67 ft.
Where does this Lake Sonoma level come from?
From the U.S. Army Corps of Engineers (USACE) public data feed for Lake Sonoma / Warm Springs Dam. Lake Levels Today republishes the agency's daily value without adjustment and links to the source below.