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lakeglance

MassachusettsReservoir, 176 acres, Middlesex County

Upper Mystic Lake conditions today

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

Right now on Upper Mystic

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Best window

0pm to 0pm

score

Wind

00kt

Gusts 00

Direction

NE

Blowing from

Air temp

00°F

High

Rain

Dry

next 6 hours

Water level

114.25ft

Down 0.11 ft this week

Sailing

Checking

Reading the forecast

Kayak and SUP

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Reading the forecast

Power boating

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Reading the forecast

Fishing

Checking

Reading the forecast

Hour by hour

Next 24 hours
Wind and gusts0 to 30+ ktScoreGood, caution, stay ashoreNightBest windowArrows point where the wind blows to.

Outlook. Monday: W wind 4 to 7 kt, gusts to 10 kt, high near 66°F. Tuesday: N wind 3 to 7 kt, gusts to 10 kt, high near 54°F.

7-day wind forecast

Live radar

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LightHeavy

Last hour of NOAA MRMS radar, 1 km resolution. Map data © OpenStreetMap contributors, OpenMapTiles, OpenFreeMap.

Water level

Full report

114.25ft above sea level

-0.11 ft in 7 days
Sep 25Oct 10Oct 25

Reading from Oct 26, 2026.

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

Lake facts

Type
Reservoir
State
Massachusetts
County
Middlesex County
Surface area
176 acres
Dam completed
1864
USGS gauge
01102505, Upper Mystic Lake, Gate House, at Winchester, MA
Coordinates
42.4306° N, 71.1489° W

Background reading: Upper Mystic Lake on Wikipedia

About Upper Mystic Lake

Set in Middlesex County, Massachusetts, Upper Mystic Lake is a 176-acre reservoir. The reservoir dates to 1864.

Water level on this page comes from USGS gauge 01102505 (Upper Mystic Lake, Gate House, at Winchester, MA). Wind, gusts and rain come from the National Weather Service forecast grid that covers the water.

On water this size, waves stay small even on windy days. The catch is gusts: shoreline terrain funnels the wind into sharp puffs that catch out small boats and paddlers. Reservoir levels move with releases and inflow, so ramps and beaches can change week to week. The water level page tracks that day by day.

The go or no-go calls above are a starting point, not a guarantee. Read how we score conditions, and always check local rules and posted warnings before you launch.

Upper Mystic Lake questions

Is it windy on Upper Mystic Lake today?

The National Weather Service forecast for the lake from October 26: Monday: W wind 4 to 7 kt, gusts to 10 kt, high near 66°F. The panel at the top of this page refreshes the current wind, gusts and direction when you open it and turns them into a call for sailing, paddling, power boating and fishing.

What is the water level at Upper Mystic Lake right now?

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

How big is Upper Mystic Lake?

Upper Mystic Lake covers about 176 acres (0.3 square miles) of surface water.

When was Upper Mystic Lake built?

The dam that forms Upper Mystic Lake was completed in 1864.

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