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Lake Walcott water level

Lake, Idaho, United States

Directions

Very low for mid-October

Surface elevation

4,237.57ft Up 0.23 ft over the last 7 days

Water stored
15,163 acre‑ft
4,238 4,240 4,243 4,245

History

4,2384,2404,2434,245ftOct 13Oct 14Oct 15Oct 16Oct 184,2384,2404,2434,245ftOct 13Oct 15Oct 18
4,2384,2404,2434,245ftSep 20Sep 27Oct 4Oct 11Oct 184,2384,2404,2434,245ftSep 20Oct 4Oct 18
4,2384,2404,2434,245ftOct 2025Jan 2026Apr 2026Jul 2026Oct 20264,2384,2404,2434,245ftOct 2025Apr 2026Oct 2026
4,2384,2404,2434,245ftOct 2016Apr 2019Oct 2021Apr 2024Oct 20264,2384,2404,2434,245ftOct 2016Oct 2021Oct 2026
4,2384,2404,2434,245ftJanMarMayJulSepNov20264,2384,2404,2434,245ftJanAprJulOct2026

202120222023202420252026

Surface elevation Normal range (10–90 %)

What this means

At 4,237.57 ft, Lake Walcott is far below normal for mid-October.

The median for mid-October is 4,240.03 ft, based on 36 years of readings, so the lake level is 2.46 ft below typical. On the same day last year the reading was 4,238.81 ft, a difference of −1.24 ft.

The water is rising: up 0.23 ft over the past week. Over the past 30 days it has moved between 4,237.24 ft and 4,242.55 ft.

Lakes and reservoirs often sit lower in fall after a summer of evaporation and use, and recover with winter rain and spring snowmelt.

Compared with 36 years of daily readings for this time of year. How to read levels

Key numbers

Median for this date
4,240.03 ft2.46 ft below the median for this date
Normal for this date
4,238.16 ft – 4,244.55 ft8 years in 10 fall in this range (36 years of records)
Same day last year
4,238.81 ft−1.24 ft
Lowest and highest in 30 days
4,237.24 ft – 4,242.55 ft
Lowest and highest in 12 months
4,237.24 ft – 4,244.88 ft

Swimming and boating at Lake Walcott

Low water changes a lake fast for boaters. Some ramps get shorter or close, docks may be moved, and rocks and sandbars that are usually well under the surface come within reach of a prop.

If you swim, pick a spot with an easy way out, and remember that drop-offs move as the level changes.

Weather at the gauge

No rain in the last 3 days.

18 Sun 68° 37° – Wind 11 mph
19 Mon 72° 40° – Wind 13 mph
20 Tue 72° 48° – Wind 15 mph
21 Wed 74° 51° 0.07 in Wind 13 mph
22 Thu 74° 51° 0.14 in, 67% Wind 13 mph
23 Fri 55° 44° 0.34 in, 76% Wind 23 mph
24 Sat 51° 37° – Wind 19 mph

Forecast: Open-Meteo

Sunrise 07:52 AM Sunset 06:47 PM Daylight 10 hr, 54 min First quarter 58%

Map

Nearby gauges

Gauge Level Compared with normal 24 hours Distance
Snake River near Minidoka Id at Howells FerryRiver gauge, Snake River 2.56 ft Below flood stage −0.01 ft 0.9 mi
Cassia Creek below Blacksmith CreekRiver gauge, Cassia Creek 6.8 cfs Normal +0.5 cfs 27 mi
Milner LakeLake 9.45 ft Normal 29 mi
Snake River Gaging Station at MilnerRiver gauge, Snake River Gaging Station 0.0 cfs Low ±0 29 mi
Snake River at NeeleyRiver gauge, Snake River 2.00 ft Below flood stage −0.02 ft 31 mi
American Falls ReservoirReservoir 4,313.23 ft Low 32 mi
Goose Creek above Trapper Creek near OakleyRiver gauge, Goose Creek 1.43 ft Below flood stage −0.01 ft 44 mi

Questions and answers

Is Lake Walcott higher than last year?

No, it is 1.24 ft lower than on the same day last year, when the reading was 4,238.81 ft.

What is a normal level for Lake Walcott in mid-October?

The median for mid-October is 4,240.03 ft. In 8 years out of 10 the reading falls between 4,238.16 ft and 4,244.55 ft, based on 36 years of records.

Is Lake Walcott really 4,237.57 ft deep?

No. 4,237.57 ft is the height of the water surface above sea level (or the agency's vertical datum), not the depth of the water.

What is the water level of Lake Walcott today?

On Oct 18, 2026, the surface elevation was 4,237.57 ft. Up 0.23 ft over the last 7 days.

Is Lake Walcott rising or falling?

Up 0.23 ft over the last 7 days.

Is the level of Lake Walcott normal?

Very low for mid-October. Compared with 36 years of daily readings for this time of year.

How often is this data updated?

The U.S. Bureau of Reclamation publishes a new reading once a day. This page refreshes within minutes of each update.

For specialists

Station codes, datum, parameters, data quality and downloads
Operator
U.S. Bureau of Reclamation
Station code
usbr:7191 (Agency page)
Coordinates
42.66992, -113.48299 (WGS84)
Update interval
once a day
Licence
Public domain. Data: U.S. Bureau of Reclamation (RISE), provisional data subject to revision

Published series

ParameterLast valueTime (UTC)Quality
Surface elevation 4,237.57 ft 2026-10-18 06:00 Provisional
Water stored 15,163 acre‑ft 2026-10-18 06:00 Provisional

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How to cite

U.S. Bureau of Reclamation: Lake Walcott (usbr:7191). Accessed October 19, 2026 via Nivelmap, https://nivelmap.com/en/united-states/idaho/lake-walcott

How we check values

Each reading is stored as published. We hold back values that jump faster than physically plausible and show the measurement time with every value.

Readings are provisional, can be delayed or wrong and are not a flood warning. Read the disclaimer