Garrisons Lake, DE

As of 2026-10-13, Garrisons Lake sits at 5.89 ft. Over the past 30 days the level has risen 0.42 ft.

The most recent reading at Garrisons Lake is 5.89 ft (2026-10-13), sourced from the U.S. Geological Survey. Readings on this page refresh automatically as the agency publishes new data.

Readings for Garrisons Lake run from 5.37 ft to 6.26 ft over the 176 days on file, which begin 2026-04-21. That window is shorter than a year, so neither end is a record for the lake. A lake's range includes a full seasonal cycle, and this gauge has not yet published one.

Reservoir levels move for four main reasons: rainfall and runoff into the basin, releases through the dam for downstream water supply, power generation or flood control, evaporation during hot months, and seasonal drawdown schedules set by the operating agency. Garrisons Lake has risen 0.42 ft over the past 30 days. For the operational reason on any given week, check the U.S. Geological Survey directly.

Year-over-year comparison is not available for Garrisons Lake yet. The published series on this page covers 176 days, from 5.37 ft to 6.26 ft. That is not long enough to describe the lake's historical range.