Lake levels › Washington

Diablo Reservoir water level today

Lower than usual for this time of year

1,140.75ft

feet above sea level ·

vs normal for Oct 10−60.6 ft
24 hours±0.00 ft
7 days±0.0 ft
30 days±0.0 ft
vs a year ago−58.9 ft

Is Diablo Reservoir low right now?

Diablo Reservoir was at 1,140.75 ft on October 10, 2026. That is 60.61 ft below the typical level for October 10 — lower than in 9 of 10 past years. Over the past week the lake has been steady.

Last 12 monthsDaily level Normal range (10–90% of past years)
1,1361,1541,1721,1901,208NovDecJanFebMarAprMayJunJulAugSepOct

Diablo Reservoir on Oct 10 in past years

20251,199.7−58.9
20241,202.9−62.2
20231,203.2−62.4
20221,201.6−60.9
20211,200.1−59.4
20201,201.9−61.2

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

Daily levels, last two weeks

DateLevel (ft)Change
Oct 101,140.75±0.00
Oct 91,140.75±0.00
Oct 81,140.75±0.00
Oct 71,140.75±0.00
Oct 61,140.75±0.00
Oct 51,140.75±0.00
Oct 41,140.75±0.00
Oct 31,140.75±0.00
Oct 21,140.75±0.00
Oct 11,140.75±0.00
Sep 301,140.75±0.00
Sep 291,140.75±0.00
Sep 281,140.75±0.00
Sep 271,140.75±0.00

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

About Diablo Reservoir

10-year range
0.0 ft (April 12, 2017) to 1,204.5 ft (August 30, 2016)
Operated by
U.S. Army Corps of Engineers
Data
U.S. Army Corps of Engineers — NWDP district, DIA
Datum
NGVD29

Lakes near Diablo Reservoir

Questions

Is Diablo Reservoir low right now?

Diablo Reservoir was at 1,140.75 ft on October 10, 2026. That is 60.61 ft below the typical level for October 10 — lower than in 9 of 10 past years. Over the past week the lake has been steady.

How often is the Diablo 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 (NWDP district, DIA). Readings are provisional and can be revised.