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 21, 2026 (17 hrs ago).
- Cold · below 60°F · 375
- Cool · 60–69°F · 594
- Comfortable · 70–86°F · 938
- Warm · above 86°F · 228
- 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.
- COLD RIVER AT HIGH STREET, AT ALSTEAD, NHUSGS gauge · New Hampshire · 8 ft³/s66°F23 mi17 hrs ago
- ASHUELOT RIVER NEAR GILSUM, NHUSGS gauge · New Hampshire · 12 ft³/s66°F31 mi17 hrs ago
- SOUTH BRANCH PISCATAQUOG RIVER NEAR GOFFSTOWN, NHUSGS gauge · New Hampshire · 15 ft³/s68°F50 mi17 hrs ago
- CONNECTICUT RIVER NEAR NORTHFIELD, MAUSGS gauge · Massachusetts · 5,880 ft³/s78°F55 mi17 hrs ago
- SOUHEGAN RIVER (SITE WLR-1) NEAR MILFORD, NHUSGS gauge · New Hampshire · 33 ft³/s69°F56 mi17 hrs ago
- LAKE CHAMPLAIN AT PORT HENRY NYUSGS gauge · New York71°F66 mi17 hrs ago
- LAMPREY RIVER AT LANGFORD ROAD, AT RAYMOND, NHUSGS gauge · New Hampshire · 7 ft³/s71°F67 mi17 hrs ago
- SACO RIVER AT RIVER STREET, AT BARTLETT, NHUSGS gauge · New Hampshire · 61 ft³/s60°F69 mi17 hrs ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.7(18)Lake Rescue
This 180-acre lake offers swimming, fishing, waterskiing, ice skating & other activities.
16 mi from your location
4.7(42)Mascoma Lake
Spacious lake with a beach for swimming & recreation, plus sailing, ice fishing & other activities.
16 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.

