Lake levels › Wyoming

Grassy Lake water level today

Lower than usual for this time of year

7,179.38ft

feet above sea level ·

vs normal for Oct 10−18.1 ft
24 hours+0.05 ft
7 days+0.2 ft
30 days−2.0 ft

Is Grassy Lake low right now?

Grassy Lake was at 7,179.38 ft on October 10, 2026. That is 18.12 ft below the typical level for October 10 — lower than in 9 of 10 past years. Over the past week the lake has been rising about 0.03 ft a day.

Last 12 monthsDaily level Normal range (10–90% of past years)
7,1767,1857,1947,2047,213NovDecJanFebMarAprMayJunJulAugSepOct

Grassy Lake on Oct 10 in past years

20257,190.8−11.4
20247,191.7−12.3
20237,197.4−18.0
20227,191.1−11.7
20217,188.3−8.9
20207,197.0−17.6

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

Daily levels, last two weeks

DateLevel (ft)Change
Oct 107,179.38+0.05
Oct 97,179.33+0.03
Oct 87,179.30+0.03
Oct 77,179.27+0.02
Oct 67,179.25+0.03
Oct 57,179.22+0.03
Oct 47,179.19+0.03
Oct 37,179.16+0.02
Oct 27,179.14+0.04
Oct 17,179.10+0.04
Sep 307,179.06+0.03
Sep 297,179.03+0.07
Sep 287,178.96+0.05
Sep 277,178.91+0.02

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

About Grassy Lake

10-year range
7,178.4 ft (September 18, 2026) to 7,210.8 ft (June 8, 2022)
Operated by
U.S. Army Corps of Engineers
Data
U.S. Army Corps of Engineers — NWDP district, GRS
Datum
NGVD29

Lakes near Grassy Lake

Questions

Is Grassy Lake low right now?

Grassy Lake was at 7,179.38 ft on October 10, 2026. That is 18.12 ft below the typical level for October 10 — lower than in 9 of 10 past years. Over the past week the lake has been rising about 0.03 ft a day.

How often is the Grassy 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, GRS). Readings are provisional and can be revised.