Lake Berryessa Water Level - 430.38 ft, 85.8% Full

Monticello Dam · Putah Creek · California - updated daily from official gauges

Western Reservoir Conditions·Daily·No. 47·Tuesday, September 8, 2026·Latest reading August 30, 2026

Gauge outage: California DWR CDEC's feed for Lake Berryessa has not published a new reading since August 30, 2026 (9 days). Figures on this page are the last reported values; they will update automatically when the station resumes reporting.

• Lake Berryessa is 85.8% full - high on this site's capacity scale - as of August 30, 2026. Surface elevation 430.38 feet, storage 1,374,567 acre-feet (capacity basis 1,602,000 acre-feet), per California DWR (CDEC) gauge data.
• That elevation is its lowest August reading since 2023, and 68.63 feet above its record low of 361.75 ft (November 30, 1992), in a daily record going back to January 1, 1985 (start of CDEC's daily record).
• Storage is 118% of the August 30 average across 38 years of record.
• Lake Berryessa is falling: elevation changed -0.48 ft over the past week, -2.19 ft over the past month, and -1.18 ft over the past year, per California DWR (CDEC) gauge data.

Lake Berryessa has fallen 1.18 feet in twelve months, and now sits 68.63 feet above its record low.

Lake Berryessa vs its record low

In the daily record used by this site (going back to January 1, 1985 (start of CDEC's daily record)), Lake Berryessa's lowest surface elevation was 361.75 feet on November 30, 1992, when storage was 421,530 acre-feet. As of August 30, 2026, Lake Berryessa is at 430.38 feet - 68.63 feet above that record. The record high in the same series was 444.75 ft on February 7, 1998.

Lake Berryessa storage in context

Lake Berryessa water level, past 12 months

85.8% full at the latest reading - across the past 12 months it ranged from 83.8% (December 20, 2025) to 96.1% (March 16, 2026). Percent full is storage against the 1,602,000-acre-foot capacity basis, not a share of the elevation plotted above.

Lake Berryessa elevation, full record

85.8% full at the latest reading - across the storage record since January 1, 1985 it ranged from 26.3% (November 30, 1992) to 111.2% (January 27, 1997). Percent full is storage against the 1,602,000-acre-foot capacity basis, not a share of the elevation plotted above. Every percentage here is measured against today's capacity basis; a reservoir's surveyed capacity changes as sediment accumulates behind the dam, so early-record percentages are indicative rather than exact.

Last 14 daily readings

Frequently asked questions

What is the water level of Lake Berryessa today?

As of August 30, 2026, Lake Berryessa's surface elevation is 430.38 feet, with 1,374,567 acre-feet in storage - 85.8% of the 1,602,000 acre-foot capacity basis. Source: California DWR CDEC daily gauge data.

How full is Lake Berryessa?

Lake Berryessa is 85.8% full as of August 30, 2026. Its storage is 118% of the August 30 average across its record since 1985. Source: California DWR CDEC daily gauge data.

When was Lake Berryessa last full?

Lake Berryessa was last at or above 95% of its 1,602,000 acre-foot capacity basis on May 14, 2026. As of August 30, 2026 it is 85.8% full. Source: California DWR CDEC daily gauge data.

Is Lake Berryessa rising or falling?

Lake Berryessa is falling: its elevation changed -0.48 feet over the week ending August 30, 2026, -2.19 ft over the past month, and -1.18 feet over the past year. Source: California DWR CDEC daily gauge data.

What was Lake Berryessa's lowest water level on record?

Lake Berryessa's lowest surface elevation in the daily record since January 1, 1985 was 361.75 feet on November 30, 1992, per the daily record used by this site. As of August 30, 2026 the reservoir is 68.63 feet above that record low.

About this gauge

Lake Berryessa, behind Monticello Dam on Putah Creek, is the largest reservoir of Reclamation's Solano Project and is known for its uncontrolled "Glory Hole" spillway, which engages at elevation 440 feet.

Operator

California Department of Water Resources (CDEC)

Station

Station BER

Measurements

Sensor 6 (reservoir elevation), sensor 15 (storage), daily

Dam

Monticello Dam

River

Putah Creek

State

California

Coordinates

38.5130, -122.1040 (CDEC station BER metadata)

Full pool reference

440.0 ft

Capacity basis

1,602,000 acre-feet (CDEC daily reservoir storage summary)

Period of record

January 1, 1985 (start of CDEC's daily record)

Status

Provisional - subject to revision by the reporting agency

Update cadence

Daily

Download the daily CSV (date, elevation ft, storage AF) or see all data downloads.

Other reservoirs tracked

California: Shasta Lake, Lake Oroville, Folsom Lake, New Melones Lake, Trinity Lake, Don Pedro Reservoir, San Luis Reservoir.
Also: Lake Mead, Lake Powell, Lake Mohave, Lake Havasu, Flaming Gorge Reservoir, Blue Mesa Reservoir, Navajo Reservoir, Lake Travis, Lake Buchanan, Canyon Lake, Amistad Reservoir, Falcon Lake, Elephant Butte Reservoir.