New Hampshire · Belknap County
Lake Winnipesaukee
Laconia · Gilford · Meredith
Loading live conditions for Lake Winnipesaukee…
Make a day of it
Plan your visit to Lake Winnipesaukee
Things to doTours & activities on Lake Winnipesaukee
Boat cruises, fishing trips, kayak rentals, and guided adventures from local operators.
Browse activities on Viator
Places to stayLake houses & rentals
Vacation rentals right on the water.
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"New Hampshire's largest lake — a 72-square-mile playground of islands, deep coves, and bustling beach towns. Winnipesaukee is the default lake for NH summer vacations, with the most rentals, marinas, and family-friendly beaches."
Seasonal pattern
When does Lake Winnipesaukee warm up?
Lake Winnipesaukee is deep (max depth 212ft) and carries significant thermal inertia, so it warms slowly — surface temperatures typically don't reach comfortable swimming range until late June or early July. Spring-fed or alpine lakes stay cooler all summer. The live forecast above shows current conditions.
Field notes
About Lake Winnipesaukee
- Largest lake entirely in New Hampshire
- Live USGS sensor at Weirs Beach when reporting (seasonal — typically summer)
- Deep — over 200ft at its deepest point, so it warms slowly
- Surface area
- 44,586 acres
- Max depth
- 212 ft
- County
- Belknap
- Water data
- Live USGS sensor
- USGS site
- 01080000