Flathead Lake is at 2,891.2 ft and fell 0.0 ft in the last day.
Current Water Level
2,891.2 ft
881.24 m · Reservoir elevation
Compared with the reading at Nov 2, 12:30 PM
Up to date- Measured
- Nov 3, 2026 12:30 PM MST
- Retrieved
- Nov 3, 2026 1:00 PM MST
- Data Source
- USGS (opens in a new tab)
- Datum
- Local reservoir datum (msl)
Water Level Chart
Reservoir elevation from Oct 27, 2026 to Nov 3, 2026: started at 2,891.47 ft and ended at 2,891.21 ft; low 2,891.18 ft, high 2,891.51 ft.
Gaps in the line are periods with no readings; they are not filled in. View data table
24 Hour Change
−0.03 ft (falling)
from 2,891.24 ft on Nov 2
7 Day Change
−0.26 ft (falling)
from 2,891.47 ft on Oct 27
30 Day Change
n/a change not available
No comparable reading
Conditions & Warnings
Forecast
- This Afternoon45°FPartly SunnyNE 2 mph0% rain
- Tonight26°FPatchy Fog0 mph0% rain
- Wednesday47°FPatchy Fog then Partly SunnySW 2 mph0% rain
- Wednesday Night27°FPartly CloudySSE 1 mph1% rain
National Weather Service forecast near Polson, MT, retrieved 2 hours ago.
Water Temperature
No official water temperature gauge is linked to this lake.
No active National Weather Service warnings for this location as of 2 hours ago.
About Flathead Lake
Flathead Lake is a large natural lake in northwestern Montana whose outlet into the Flathead River is controlled by Seli'š Ksanka Qlispe' (formerly Kerr) Dam near Polson. The USGS gauge at Polson measures the lake surface elevation.
Flathead Lake Location
Flathead LakeLake, Montana
Map location is approximate. Map data © OpenStreetMap contributors.
Compare & Share
Compare with other lakesOfficial Source & Methodology
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Reservoir elevation
U.S. Geological Survey Water Data · ID
12371550· Local reservoir datum (msl) Official page
The headline number is the reservoir elevation reported by U.S. Geological Survey Water Data (typically every 15 minutes (provisional data)). The "Measured" time is when the agency recorded it; "Retrieved" is when this site last downloaded it.
Recent readings are provisional and may be revised by the agency. Wind, waves and dam operations can change the level between readings. This page is not a flood warning or navigation service; for safety information contact the lake operator and the National Weather Service.
Gauge verified 2026-10-28: Flathead Lake at Polson MT read 2891.46 ft (00062). Coordinates are the gauge location. Confirm reference levels with the operator before publishing.