Maine — Water Temperature Today and Throughout the Year
Discover water temperatures in Maine (United States), with real-time data and annual trends. Find all locations in the region and check the water temperature in them. We find every place where you can swim and show you the water temperature there today and throughout the year.
Sea Water Temperature Along the Coast
Chart of Average Temperature Changes Over the Last 60 Days
Places with the Warmest Sea Water Today
The Most Popular Seaside Places
- York Harbor14°C
- Portland14°C
- Blue Hill12°C
- Bar Harbor11°C
- Biddeford14°C
- Saco14°C
- Falmouth14°C
- Ogunquit14°C
- Harpswell14°C
- Southwest Harbor11°C
- Kittery15°C
- Freeport14°C
- Cape Elizabeth14°C
- South Bristol12°C
- Popham Beach13°C
- Winter Harbor11°C
- Belfast12°C
- Old Orchard Beach14°C
- Wells14°C
- Kennebunkport14°C
- Friendship12°C
- Scarborough14°C
- Boothbay Harbor12°C
- Rockland11°C
- Rockport11°C
- Kennebunk14°C
- Gouldsboro11°C
- Swans Island10°C
- Roque Bluffs9°C
- Castine12°C
- Northport12°C
- Tremont11°C
Coastal Seas and Oceans
Water Temperature in Lakes and Rivers
Popular Lakes
Popular Rivers
Water Temperature and Swimming Overview
Regions and Map
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Water Temperature Trends
Maine, known for its rugged coastline and numerous lakes, experiences varying water temperatures depending on the location and season. Along the coastline, the water temperature is influenced by the Atlantic Ocean and its colder currents. In the summer, water temperatures off the coast of Maine typically range from 55°F to 65°F (13°C to 18°C). These cooler temperatures make the waters refreshing but not as warm as those in southern states, making it less ideal for extended swimming but perfect for activities like sailing, kayaking, and coastal fishing.
As autumn approaches, the temperatures along the coast begin to cool further, often dropping to around 45°F to 55°F (7°C to 13°C) by October. This drop in temperature marks the end of the peak tourist season but continues to offer excellent opportunities for anglers and those who enjoy the quieter, more peaceful conditions along the shoreline. Winter temperatures in the ocean can dip to around 40°F (4°C), making swimming and water sports less common, though the region still attracts tourists for its scenic winter landscapes and coastal activities.
In Maine's rivers and lakes, the temperatures are also influenced by the season and the region's cooler climate. In the summer, rivers like the Kennebec and Penobscot, as well as lakes such as Sebago Lake, have water temperatures ranging from 60°F to 70°F (16°C to 21°C). These conditions are favorable for recreational activities such as boating, fishing, and paddling. As the temperatures drop in the fall and winter, the water cools significantly, with rivers and lakes often reaching temperatures of 35°F to 45°F (1°C to 7°C) by early spring. This cooler water creates ideal conditions for trout fishing but reduces the appeal for other water-based activities, particularly for those seeking warmer conditions.