732.81 ft US Army Corps of Engineers
level Reading is typical for late September.
Reading comes from California DWR — California Data Exchange Center (CDEC station COY) by way of our own server, which asks the agency each time you load this page and passes on its figure in the agency's own datum, unchanged. Most of these reservoirs report every hour and a few report once a day, so the stamp beside the reading is a time of day for some lakes and a date for others — whichever CDEC put on it. For everything else the agency publishes about this reservoir, go to Lake Mendocino at CDEC.
Lake Mendocino through the year
The band is the lake's own normal: where the level has run on each calendar day, 1985–2026. The summer drawdown — and how this year sits in it — shows up without reading a single number.
This year vs the years that matter
This year's trace against last year and the driest and wettest years on record — the drought-context question every lake regular asks.
- 2026 (this year)
- 2025 (last year)
- 2010 (wettest on record)
- 2021 (driest on record)
Full pool, datum, and the gauge
"Full pool" here means the conservation pool — the level the lake is designed to hold for water supply and recreation, not the flood-control space above it. The full explainer covers flood pool and dead pool too.
| Full pool | not published by the operator |
|---|---|
| Conservation capacity | 122,400 acre-feet · per US Army Corps of Engineers (Sonoma Water) capacity reference |
| Gauge | CDEC station COY · California DWR — California Data Exchange Center |
| Datum | US Army Corps of Engineers — Mendocino is run to a variable seasonal conservation pool — a guide curve between 68,400 and 111,000 acre-feet — so no single full-pool elevation would be honest. |
| Last verified | August 15, 2026 |
LakeDates reports lake level, not ramp status. Whether a given ramp or marina is usable at this level varies ramp by ramp — call the marina before you tow.
Quick answers
What is the lake level for Lake Mendocino today?
Lake Mendocino is at 732.81 ft (US Army Corps of Engineers) as of September 23, 2026 — Reading is typical for late September.
Is Lake Mendocino full?
US Army Corps of Engineers (Sonoma Water) doesn't publish a conservation-pool figure for Lake Mendocino, so this page shows the reading against the lake's own seasonal history instead.
What is full pool for Lake Mendocino?
US Army Corps of Engineers (Sonoma Water) doesn't publish a single conservation-pool elevation for Lake Mendocino. The seasonal chart shows the range the lake actually runs instead.