Lake levels › South Dakota

Angostura Reservoir water level today

Lower than usual for this time of year

3,169.32ft

feet above sea level ·

vs normal for Oct 10−12.9 ft
24 hours−103.43 ft
7 days−103.3 ft
30 days−152.5 ft
vs a year ago−208.0 ft

Is Angostura Reservoir low right now?

Angostura Reservoir was at 3,169.32 ft on October 10, 2026. That is 12.89 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 4.94 ft a day.

Last 12 monthsDaily level Normal range (10–90% of past years)
3,0673,4283,7894,1494,510NovDecJanFebMarAprMayJunJulAugSepOct

Angostura Reservoir on Oct 10 in past years

20253,273.9−104.6
20243,279.4−110.0
20233,282.7−113.4
20223,170.8−1.4
20213,175.2−5.8
20203,176.6−7.3

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

Daily levels, last two weeks

DateLevel (ft)Change
Oct 103,307.25+34.50
Oct 93,272.75−51.71
Oct 83,324.46+51.73
Oct 73,272.73−103.44
Oct 63,376.17+155.20
Oct 53,220.97−51.71
Oct 43,272.68+0.02
Oct 33,272.66−103.44
Oct 23,376.10+155.21
Oct 13,220.89−51.71
Sep 303,272.60−155.17
Sep 293,427.77−362.11
Sep 283,789.88−620.84
Sep 274,410.72±0.00

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

About Angostura Reservoir

10-year range
3,143.8 ft (February 3, 2023) to 4,410.7 ft (September 25, 2026)
Operated by
U.S. Army Corps of Engineers
Data
U.S. Army Corps of Engineers — NWDM district, ANGA
Datum
LOCAL

Lakes near Angostura Reservoir

Questions

Is Angostura Reservoir low right now?

Angostura Reservoir was at 3,169.32 ft on October 10, 2026. That is 12.89 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 4.94 ft a day.

How often is the Angostura Reservoir 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 (NWDM district, ANGA). Readings are provisional and can be revised.