Maine · Cumberland County
Sebago Lake
Naples · Raymond · Standish · Sebago
Loading live conditions for Sebago Lake…
Make a day of it
Plan your visit to Sebago Lake
Things to doTours & activities on Sebago Lake
Boat cruises, fishing trips, kayak rentals, and guided adventures from local operators.
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Places to stayLake houses & rentals
Vacation rentals right on the water.
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"Maine's second-largest lake and Portland's primary summer getaway — a 30-minute drive from the city. Deep, clear, and the drinking-water source for greater Portland. Sebago Lake State Park has the most-visited swimming beach in southern Maine."
Seasonal pattern
When does Sebago Lake warm up?
Sebago Lake is deep (max depth 316ft) 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 Sebago Lake
- Drinking-water source for Portland metro — protected watershed
- Sebago Lake State Park hosts the busiest swim beach in southern Maine
- Deep enough (316ft) to stay cool through summer
- Connected by Songo River to a network of smaller lakes
- Surface area
- 30,513 acres
- Max depth
- 316 ft
- County
- Cumberland
- Water data
- Modeled estimate from air-temp trends