Live · updated daily from USGS
Swimmable water near you
2,135 USGS sensors are reporting a live water temperature right now, the newest reading from August 22, 2026 (14 hrs ago).
- Cold · below 60°F · 384
- Cool · 60–69°F · 607
- Comfortable · 70–86°F · 929
- Warm · above 86°F · 215
- You
A map of the United States with one coloured dot per USGS sensor reporting a live water temperature. The readings are listed below.
Nearest live readings
The closest USGS sensors currently reporting a water temperature, nearest first.
- SACO RIVER AT RIVER STREET, AT BARTLETT, NHUSGS gauge · New Hampshire · 61 ft³/s60°F37 mi1 day ago
- Wild River at Gilead, MaineUSGS gauge · Maine · 23 ft³/s65°F43 mi15 hrs ago
- ISINGLASS R AT ROCHESTER NECK RD, NR DOVER, NHUSGS gauge · New Hampshire · 4 ft³/s64°F43 mi1 day ago
- LAMPREY RIVER AT LANGFORD ROAD, AT RAYMOND, NHUSGS gauge · New Hampshire · 7 ft³/s71°F61 mi1 day ago
- 63°F70 mi1 day ago
- SOUTH BRANCH PISCATAQUOG RIVER NEAR GOFFSTOWN, NHUSGS gauge · New Hampshire · 15 ft³/s68°F75 mi1 day ago
- CONNECTICUT RIVER AT NORTH STRATFORD, NHUSGS gauge · New Hampshire · 501 ft³/s63°F81 mi1 day ago
- SOUHEGAN RIVER (SITE WLR-1) NEAR MILFORD, NHUSGS gauge · New Hampshire · 33 ft³/s69°F86 mi1 day ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.8(191)Sebago Lake
Large lake & recreation area offering fishing, boating, campgrounds, trails & beaches.
4.5 mi from your location
4.8(110)Long Lake
This 11-mile-long glacial lake features fishing, boating, loons & other wildlife.
15 mi from your location
4.7(41)Conway Lake
A popular fishing hole, this 1,316-acre lake features a boat launch, swimming beach & campground.
23 mi from your location
About this map
Every pin is a live reading from a USGS real-time monitoring station, captured in a daily snapshot. Colours follow the site’s cold-water-safety thresholds and describe the water at that one sensor — usually a river or stream gauge, not a swim beach — so treat them as a guide to what the water is doing nearby, not a verdict on a specific spot. Readings are provisional and can be revised by the USGS. Your location only sorts this page: the coordinates appear in the address bar (rounded to about a mile) and are not saved to an account or our database.
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.

