What is the current water temperature at Squam Lake?

Current water temperature for Squam Lake is shown in the live forecast above. Most New Hampshire lakes have no public real-time water-temperature sensor, so we estimate from recent and forecast air-temperature trends weighted by the lake's depth (98ft maximum).

Where is Squam Lake located?

Squam Lake is in New Hampshire (Grafton County), with public access near Holderness, Center Harbor, Sandwich, Moultonborough. Surface area is 6,791 acres.

How deep is Squam Lake?

Squam Lake's maximum depth is 98 feet. Deeper lakes carry more thermal inertia and warm more slowly through summer; shallower lakes track the air temperature faster.

New Hampshire · Grafton County

Squam Lake

Holderness · Center Harbor · Sandwich · Moultonborough

Loading live conditions for Squam Lake…

Surface area6,791acres

Max depth98feet

CountyGrafton

Data sourceEWMA modelAir-temp trend

Things to do

Tours & activities on Squam Lake

Boat cruises, fishing trips, kayak rentals, and guided adventures from local operators.

Browse activities on Viator

Places to stay

Lake houses & rentals

Vacation rentals right on the water.

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"The pristine, quiet lake made famous by "On Golden Pond." Clear water, protected shoreline, and a no-frills feel make it a favorite for families who want calm swimming and loon-watching. Quieter and cooler than neighboring Winnipesaukee."

Seasonal pattern

When does Squam Lake warm up?

Squam Lake (max depth 98ft) typically reaches swim-comfortable surface temperatures (65°F+) by early to mid-June in New Hampshire. The live forecast above shows current conditions.

Field notes

About Squam Lake

Exceptionally clear, clean water
Squam Lakes Natural Science Center nearby
No public real-time sensor; surface temperature is modeled

Surface area: 6,791 acres
Max depth: 98 ft
County: Grafton
Water data: Modeled estimate from air-temp trends