Weekly swim report · August 21, 2026
Maine swim report
On August 21, 2026 the warmest USGS water reading in Maine was 75°F at St. Croix River at Milltown, Maine; 1 water-related NWS hazard is active.
Warmest water
The 5 warmest of 7 sensors reporting a water temperature in Maine today. Station names open the official monitoring page.
- #1St. Croix River at Milltown, MaineUSGS gauge75°F 24°C8 hrs ago
- #2Lewy Lake at Princeton, MaineUSGS gauge75°F 24°C8 hrs ago
- #375°F 24°C9 hrs ago
- #4E. Br. Penobscot River below Grand Lake MatagamonUSGS gauge · 307 ft³/s71°F 22°C9 hrs ago
- #5Allagash River near Allagash, MaineUSGS gauge · 437 ft³/s67°F 19°C9 hrs ago
Active hazards in Maine
Alerts cover counties or forecast zones — an alert for an area does not mean every river or beach inside it is affected. Times are local to the issuing office.
- CautionBeach Hazards Statement
A Beach Hazards Statement is in effect for Coastal Hancock; Coastal Washington.
NWS Caribou ME · until Aug 21, 8:00 PM
Where to swim in Maine
The most-reviewed, well-rated water destinations in Maine — check each one’s live conditions before you go.
4.8(2,067)Popham Beach State Park
Expansive, sandy beach with occasional strong surf, plus picnic & changing facilities.
4.6(265)Rangeley Lake State Park
A popular camping destination, this lakefront park also offers hiking, fishing & winter sports.
4.8(191)Sebago Lake
Large lake & recreation area offering fishing, boating, campgrounds, trails & beaches.
4.8(110)Long Lake
This 11-mile-long glacial lake features fishing, boating, loons & other wildlife.
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Conditions are for general information only and can change quickly. Always judge the water in person and follow posted advisories and local guidance before swimming or paddling.