Lake levels › Montana

Thompson Falls Lake water level today

Normal for this time of year

2,396.21ft

feet above sea level ·

vs normal for Oct 10+0.1 ft
24 hours−0.21 ft
7 days−0.1 ft
30 days+0.1 ft

Is Thompson Falls Lake low right now?

Thompson Falls Lake was at 2,396.21 ft on October 10, 2026. That is 0.05 ft above the typical level for October 10, within the normal range. Over the past week the lake has been steady.

Last 12 monthsDaily level Normal range (10–90% of past years)
2,3902,3922,3942,3962,397NovDecJanFebMarAprMayJunJulAugSepOct

Thompson Falls Lake on Oct 10 in past years

20252,396.2+0.1
20242,395.5+0.7
20232,382.2+14.0
20222,396.0+0.2
20212,396.3−0.1
20202,396.4−0.2

Level on the same date each year, and how today compares.

Daily levels, last two weeks

DateLevel (ft)Change
Oct 92,396.21−0.21
Oct 82,396.42+0.09
Oct 72,396.33±0.00
Oct 62,396.33−0.05
Oct 52,396.38−0.03
Oct 42,396.41+0.04
Oct 32,396.37+0.03
Oct 22,396.34+0.03
Oct 12,396.31−0.04
Sep 302,396.35+0.03
Sep 292,396.32−0.03
Sep 282,396.35+0.01
Sep 272,396.34−0.03
Sep 262,396.37+0.02

Daily means of the operator's readings (midnight to midnight, local time).

About Thompson Falls Lake

10-year range
239.2 ft (June 29, 2025) to 2,397.0 ft (July 31, 2026)
Operated by
U.S. Army Corps of Engineers
Data
U.S. Army Corps of Engineers — NWDP district, TOM
Datum
NGVD29

Lakes near Thompson Falls Lake

Questions

Is Thompson Falls Lake low right now?

Thompson Falls Lake was at 2,396.21 ft on October 10, 2026. That is 0.05 ft above the typical level for October 10, within the normal range. Over the past week the lake has been steady.

How often is the Thompson Falls Lake level updated?

The operator reports every 15 minutes to an hour. This page refreshes several times a day; the time of the latest reading is shown next to the level.

Where does this data come from?

U.S. Army Corps of Engineers (NWDP district, TOM). Readings are provisional and can be revised.