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lakeglance

MassachusettsReservoir, 176 acres, Middlesex County

Upper Mystic Lake water level

Upper Mystic Lake, Massachusetts
Photo: User:Magicpiano, CC BY-SA 4.0

Current level

114.25ft above sea level

Reading from Oct 26, 2026

Past 24 hours
0.00ft
Past 7 days
-0.11ft
Past 30 days
-0.09ft
Trend
Falling

Upper Mystic Lake was at 114.25 ft on October 26, falling 0.11 ft over the past week.

Last 30 days

114.0114.5115.0Sep 25Oct 10Oct 25

Recent daily readings

Upper Mystic Lake daily mean water level, newest first
DateLevel (ft above sea level)Change
Oct 25, 2026114.25-0.02
Oct 24, 2026114.27-0.01
Oct 23, 2026114.28-0.02
Oct 22, 2026114.30-0.02
Oct 21, 2026114.32-0.02
Oct 20, 2026114.34-0.02
Oct 19, 2026114.36-0.03
Oct 18, 2026114.39-0.05
Oct 17, 2026114.44+0.01
Oct 16, 2026114.43-0.04
Oct 15, 2026114.47-0.09
Oct 14, 2026114.56-0.14
Oct 13, 2026114.70-0.08
Oct 12, 2026114.78+0.60

Reading these numbers

Readings are reservoir surface elevations in feet, as published by the U.S. Geological Survey. Compare them with ramp and dock elevations from the lake operator to judge whether a launch is usable.

On a reservoir, a few feet of drop changes the shoreline more than you would think. Low water exposes stumps, sandbars and old roadbeds that are normally well under the hull, and some ramps end before the water does.

High water brings its own problems: floating debris after storms, flooded docks and courtesy piers, and no-wake rules near flooded campgrounds. A quick look at the trend before you hitch up saves a wasted trip.

The gauge is listed by USGS as Upper Mystic Lake, Gate House, at Winchester, MA. Wind can pile water up at one end of a big lake for a few hours, so short spikes on a windy day are normal.

Upper Mystic Lake water level questions

What is the water level at Upper Mystic Lake today?

Upper Mystic Lake was at 114.25 ft on October 26, falling 0.11 ft over the past week.

Is Upper Mystic Lake rising or falling?

Over the last seven days the level has fallen (-0.11 ft), and it is -0.09 ft compared with 30 days ago.

Where does the Upper Mystic Lake water level data come from?

From the U.S. Geological Survey, gauge 01102505 (Upper Mystic Lake, Gate House, at Winchester, MA). USGS publishes provisional readings every 15 to 60 minutes; they can be revised later after quality checks.

How often is this page updated?

The page itself is rebuilt every day with the latest daily values, and the current reading refreshes straight from the USGS each time you open it.

Nearby lakes

If Upper Mystic is blown out, these are the closest alternatives. Tap through for their water levels.