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Flathead Lake water level today

Flathead Lake is at 2,891.94 ft, as of October 18, 2026.

  • Past week: down 0.43 ft
  • Compared with a year ago: up 1.15 ft
  • 0.76 ft above the 10-year average for October 18 (2,891.18 ft)
  • Lower on this date in 13 of the 14 years on record
Water level2,891.94 ftelevation, feet
vs. normal+0.76 ft10-year average for today
7-day change-0.43 ft
30-day change-1.15 ft
1-year change+1.15 ft

Past 12 months

2,8852,8872,8892,8912,894NovDecJanFebMarAprMayJunJulAugSepOct

Past 12 monthsYear before

Last 30 days

DateLevel (ft)
Oct 182,891.94
Oct 172,891.97
Oct 162,892.05
Oct 152,892.10
Oct 142,892.14
Oct 132,892.19
Oct 122,892.26
Oct 112,892.37
Oct 102,892.40
Oct 92,892.41
Oct 82,892.50
Oct 72,892.55
Oct 62,892.58
Oct 52,892.62
Oct 42,892.66
Oct 32,892.68
Oct 22,892.71
Oct 12,892.75
Sep 302,892.75
Sep 292,892.76
Sep 282,892.84
Sep 272,892.87
Sep 262,892.85
Sep 252,892.93
Sep 242,892.98
Sep 232,893.00
Sep 222,893.02
Sep 212,893.04
Sep 202,893.06
Sep 192,893.07
Sep 182,893.09

This date in past years

DateLevel (ft)Today vs. then
October 18, 20252,890.79+1.15
October 18, 20242,891.77+0.17
October 18, 20232,890.14+1.80
October 18, 20222,891.22+0.72
October 18, 20212,891.05+0.89
October 18, 20202,891.69+0.25
October 18, 20192,890.74+1.20
October 18, 20182,891.46+0.48
October 18, 20172,891.14+0.80
October 18, 20162,891.83+0.11

Records

Highest level on record: 2,893.57 ft (June 24, 2022). Lowest: 2,883.50 ft (March 17, 2013). Records in this series start October 23, 2011.

About these numbers

  • Levels are daily mean water-surface elevations measured by the U.S. Geological Survey at this lake's gauge
  • Recent readings are provisional and can be revised once USGS reviews them
  • "vs. normal" compares today with the average for the same calendar date over the last 10 years of this gauge's record
  • Latest reading: October 18, 2026. Official USGS page for this gauge

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