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Flathead Lake Water Level Today

Daily level, distance to full pool and history for Flathead Lake, on the Flathead River in Montana.

Updated · Source: USGS 12371550 Provisional

Water level Provisional

2,890.89ft

msl · 5:30 PM MST, Nov 8, 2026

  • 2.11 ftbelow full pool (2,893.0 ft)
  • −0.10 ftin 24 h−0.40 ft in 7 days−1.52 ft in 30 days
2,8902,8922,8942,8962,8902,8922,8942,8962,8902,8922,8942,896
  • Full pool
  • 1 yr ago

Is Flathead Lake full?

No. Flathead Lake is 2.11 ft below full pool (2,893.0 ft). It is 0.02 ft higher than a year ago (2,890.87 ft on Nov 8, 2025).

Flathead Lake level history

Full pool 2,893.0 ft
View data table
DateLevel (ft)% full
Nov 8, 20262,890.89—
Nov 7, 20262,891.01—
Nov 6, 20262,891.04—
Nov 5, 20262,891.09—
Nov 4, 20262,891.13—
Nov 3, 20262,891.19—
Nov 2, 20262,891.25—
Nov 1, 20262,891.29—
Oct 31, 20262,891.33—
Oct 30, 20262,891.38—
Oct 29, 20262,891.41—
Oct 28, 20262,891.44—
Oct 27, 20262,891.49—
Oct 26, 20262,891.58—
Oct 25, 20262,891.63—
Oct 24, 20262,891.67—
Oct 23, 20262,891.73—
Oct 22, 20262,891.75—
Oct 21, 20262,891.81—
Oct 20, 20262,891.85—
Oct 19, 20262,891.90—
Oct 18, 20262,891.95—
Oct 17, 20262,891.98—
Oct 16, 20262,892.05—
Oct 15, 20262,892.10—
Oct 14, 20262,892.14—
Oct 13, 20262,892.19—
Oct 12, 20262,892.26—
Oct 11, 20262,892.37—
Oct 10, 20262,892.40—
Oct 9, 20262,892.41—
  • Flathead Lake level
  • Full pool 2,893.0 ft
  • Above full pool
Source: USGS · Daily averages since 1999

Flathead Lake on Nov 8 in past years

Flathead Lake water level on Nov 8 in past years
YearLevel (ft)vs todayvs full pool
2026today2,890.89—−2.11 ft
20252,890.87−0.02−2.13 ft
20242,891.06+0.17−1.94 ft
20232,890.11−0.78−2.89 ft
20222,891.07+0.18−1.93 ft
20212,891.22+0.33−1.78 ft
20202,891.17+0.28−1.83 ft
20192,890.53−0.36−2.47 ft
20182,891.21+0.32−1.79 ft
20172,890.69−0.20−2.31 ft
20162,892.62+1.73−0.38 ft

Today’s level is the highest for this date since 2024.

Lake facts

Full pool (conservation pool)
2,893.0 ft msl
Highest since 1999
2,893.57 ftJun 24, 2022
Lowest since 1999
2,883.13 ftApr 10, 2008
Data since
Oct 1, 1999
Dam
Seli'š Ksanka Qlispe' Damcompleted 1938
River
Flathead River
Owned by
Energy Keepers, Inc.
Dam location
Lake County
Gauge location
47.6969, −114.1613

Dam, river and owner from the National Inventory of Dams (USACE). Records cover Oct 1, 1999 to today (daily averages).

Weather on the lake

  1. This Afternoon52°FHighLow 33°FS 10 mphMostly Cloudy
  2. Tonight33°FLowS 1–9 mphMostly Cloudy
  3. Monday46°FHighLow 36°FN 2 mphSlight Chance Light Rain then Mostly Cloudy
  4. Tuesday51°FHighLow 37°FSSW 6–10 mphChance Light Rain
  5. Wednesday56°FHighLow 36°FS 2 mphPartly Sunny
  6. Thursday57°FHighLow 37°FSSW 1 mphPartly Sunny
  7. Friday58°FHighLow 38°FS 1–8 mphPartly Sunny

Forecast: National Weather Service for the dam area (47.70, −114.16). Wind speeds are forecasts, not measurements.

Quick answers

What is the full pool level of Flathead Lake?
2,893.0 ft above mean sea level, the top of its conservation pool. Above it, water is released or flows over the spillway of Seli'š Ksanka Qlispe' Dam.
How much does Flathead Lake need to be full?
Flathead Lake needs 2.11 ft more water to reach full pool (2,893.0 ft), as of Nov 8, 2026.
Is Flathead Lake rising or falling?
It is falling: −0.40 ft in the last 7 days and −0.10 ft in 24 hours, to 2,890.89 ft on 5:30 PM MST, Nov 8, 2026 (US Geological Survey).
When was Flathead Lake last full?
It was last at or above full pool (2,893.0 ft) on Sep 23, 2026. On Nov 8, 2026 it was 2.11 ft below.
What is the highest level in our data?
Flathead Lake reached 2,893.57 ft on Jun 24, 2022. The lowest was 2,883.13 ft on Apr 10, 2008 (USGS data since 1999; older records are not in this data set).
How much has Flathead Lake changed in the last year?
In the last 12 months it ranged from 2,886.35 ft (Mar 20, 2026) to 2,893.15 ft (Jul 2, 2026), a swing of 6.80 ft.
How often is this page updated?
This page is updated several times a day with the latest reading from US Geological Survey. The last reading is from 5:30 PM MST, Nov 8, 2026.

Where this data comes from

Reservoir gauge 12371550 of the US Geological Survey (waterdata.usgs.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.