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Lewiston Lake Water Level Today

Daily level, distance to full pool and history for Lewiston Lake, on the Trinity River in California.

Updated · Source: CDEC station LEW Provisional

Water level Provisional

1,900.84ft

msl · 6:00 AM PST, Nov 9, 2026

  • 1.16 ftbelow full pool (1,902.0 ft)
  • −0.35 ftin 24 h+0.04 ft in 7 days−0.04 ft in 30 days
1,9001,9021,9041,9001,9021,9041,9001,9021,904
  • Full pool
  • 1 yr ago

Is Lewiston Lake full?

No. Lewiston Lake is 1.16 ft below full pool (1,902.0 ft). It is 0.48 ft lower than a year ago (1,901.32 ft on Nov 9, 2025).

Lewiston Lake level history

Full pool 1,902.0 ft
View data table
DateLevel (ft)
Nov 9, 20261,900.84
Nov 8, 20261,900.98
Nov 7, 20261,900.82
Nov 6, 20261,900.99
Nov 5, 20261,900.86
Nov 4, 20261,900.98
Nov 3, 20261,900.78
Nov 2, 20261,900.91
Nov 1, 20261,900.50
Oct 31, 20261,900.45
Oct 30, 20261,900.81
Oct 29, 20261,900.98
Oct 28, 20261,900.52
Oct 27, 20261,900.64
Oct 26, 20261,900.60
Oct 25, 20261,900.83
Oct 24, 20261,900.96
Oct 23, 20261,900.93
Oct 22, 20261,900.96
Oct 21, 20261,900.58
Oct 20, 20261,900.58
Oct 19, 20261,900.68
Oct 18, 20261,900.86
Oct 17, 20261,900.78
Oct 16, 20261,900.84
Oct 15, 20261,900.95
Oct 14, 20261,901.03
Oct 13, 20261,901.03
Oct 12, 20261,901.05
Oct 11, 20261,901.10
Oct 10, 20261,900.88
  • Lewiston Lake level
  • Full pool 1,902.0 ft
  • Above full pool
Source: CDEC · Daily averages since 1987

Lewiston Lake on Nov 9 in past years

Lewiston Lake water level on Nov 9 in past years
YearLevel (ft)vs todayvs full pool
2026today1,900.84—−1.16 ft
20251,901.32+0.48−0.68 ft
20241,901.35+0.51−0.65 ft
20231,900.76−0.08−1.24 ft
20221,901.39+0.55−0.61 ft
20211,901.34+0.50−0.66 ft
20201,901.61+0.77−0.39 ft
20191,901.42+0.58−0.58 ft
20181,901.48+0.64−0.52 ft
20171,901.47+0.63−0.53 ft
20161,901.82+0.98−0.18 ft

Today’s level is the lowest for this date since 2023.

Lake facts

Full pool (conservation pool)
1,902.0 ft msl
Highest since 1987
1,902.66 ftJul 28, 2018
Lowest since 1987
1,897.84 ftOct 14, 2001
Data since
Jun 20, 1987
Dam
Lewiston Damcompleted 1962
River
Trinity River
Owned by
Bureau of Reclamation
Dam location
Trinity County
Gauge location
40.7270, −122.7930

Dam, river and owner from the National Inventory of Dams (USACE). Records cover Jun 20, 1987 to today (daily averages).

Weather on the lake

  1. Today59°FHighLow 43°FSW 1–5 mphChance Rain Showers
  2. Tonight43°FLowW 2 mphPartly Cloudy then Patchy Fog
  3. Tuesday66°FHighLow 44°FN 1 mphAreas Of Fog
  4. Wednesday65°FHighLow 42°FNE 1–5 mphSunny
  5. Thursday59°FHighLow 41°FNE 0–5 mphMostly Sunny
  6. Friday54°FHighLow 42°FSSE 0–5 mphChance Light Rain
  7. Saturday50°FHighLow 38°FESE 0–5 mphLight Rain

Forecast: National Weather Service for the dam area (40.73, −122.79). Wind speeds are forecasts, not measurements.

Nearby lakes

Quick answers

What is the full pool level of Lewiston Lake?
1,902.0 ft above mean sea level, the top of its conservation pool. Above it, water is released or flows over the spillway of Lewiston Dam.
How much does Lewiston Lake need to be full?
Lewiston Lake needs 1.16 ft more water to reach full pool (1,902.0 ft), as of Nov 9, 2026.
Is Lewiston Lake rising or falling?
It is steady: +0.04 ft in the last 7 days and −0.35 ft in 24 hours, to 1,900.84 ft on 6:00 AM PST, Nov 9, 2026 (California Data Exchange Center).
When was Lewiston Lake last full?
It was last at or above full pool (1,902.0 ft) on Jul 28, 2018. On Nov 9, 2026 it was 1.16 ft below.
What is the highest level in our data?
Lewiston Lake reached 1,902.66 ft on Jul 28, 2018. The lowest was 1,897.84 ft on Oct 14, 2001 (CDEC data since 1987; older records are not in this data set).
How much has Lewiston Lake changed in the last year?
In the last 12 months it ranged from 1,900.13 ft (Feb 16, 2026) to 1,901.90 ft (Apr 23, 2026), a swing of 1.77 ft.
How often is this page updated?
This page is updated several times a day with the latest reading from California Data Exchange Center. The last reading is from 6:00 AM PST, Nov 9, 2026.

Where this data comes from

Hourly reservoir elevation from the California Data Exchange Center of the California Department of Water Resources (station LEW, cdec.water.ca.gov). Recent readings are provisional and may be revised. Weather from the National Weather Service. Dam details from the National Inventory of Dams.

Lake Levels Daily is an independent site, not affiliated with TWDB, LCRA, USACE, USGS, NOAA, TVA or any lake operator. Check official sources before making safety decisions.