Lake Nacimiento lake and shoreline

Lake Nacimiento Water Level

Officially Nacimiento Reservoir (Nacimiento Dam)

California

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Lake Nacimiento is currently 51.9 feet below full pool, with a water-surface elevation of 748.1 feet.

748.12 ft · Updated 1 day ago · California Data Exchange Center

Current level

748.12ft

−51.88 ft vs full pool

Low

Vs full pool

Since last reading

Down 0.26 ft

Previous readingSep 8748.38 ft

7-day change

Down 1.78 ft

7-day trend: Falling

8 daily readings in the last 7 days

30-day change

Down 7.54 ft

29 daily readings in the last 30 days

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Water Level History

Elevation (ft) NGVD29 · MSL

754 ft774 ft794 ftFULL POOL 800.00 ftAug 11Sep 10

Level status

51.88 ft below full pool

Current level
748.12 ft
Full pool
800 ft
DatumElevation referenced to National Geodetic Vertical Datum of 1929.
NGVD29
Elevation reference
MSL
Source
California Data Exchange Center

Reference levels

  • Full pool800 ft
  • Flood stage801 ft

Watershed drought

No Drought

None reported for the surrounding watershed.

Severity

NoneExtreme
Trend
Stable

Watershed drought conditions

San Luis Obispo County, CA

No Drought

No Drought. No official drought conditions.. Trend: Stable compared with last week. Official drought no

Severity

NoneExtreme

Weekly trend

Stable

Compared with last week

Official drought

No

No official drought is reported for the surrounding watershed.

U.S. Drought Monitor · map date Sep 8, 2026. Updated weekly. droughtmonitor.unl.eduView drought map for San Luis Obispo County, CA

Daily level summary

  • Sep 9, 2026

    748.12 ft

    -0.26 ft

  • Sep 8, 2026

    748.38 ft

    -0.24 ft

  • Sep 7, 2026

    748.62 ft

    -0.26 ft

  • Sep 6, 2026

    748.88 ft

    -0.26 ft

  • Sep 5, 2026

    749.14 ft

    -0.26 ft

  • Sep 4, 2026

    749.4 ft

    -0.25 ft

  • Sep 3, 2026

    749.65 ft

    -0.25 ft

Common questions about Lake Nacimiento’s water level

  • The current water level at Lake Nacimiento is 748.12 ft (updated 1 day ago). You can track the Lake Nacimiento lake level on the interactive chart and daily history above.

  • Full pool for Lake Nacimiento is 800 ft — the normal conservation target elevation when the reservoir is at its designed summer or operating pool.

  • The current 7-day trend for the Lake Nacimiento lake level is falling — falling about 1.78 ft over the past week. See the history chart above for the full picture.

  • Based on the latest gauge reading, Lake Nacimiento is currently 51.88 ft below full pool.

Lake level glossary

Definitions for pool targets, datums, and how elevation readings are labeled.

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