Live · updated daily from USGS
Swimmable water near you
2,136 USGS sensors are reporting a live water temperature right now, the newest reading from August 22, 2026 (6 hrs ago).
- Cold · below 60°F · 384
- Cool · 60–69°F · 607
- Comfortable · 70–86°F · 930
- 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.
- Rays Br Juniata R bl Rays Dam nr Huntingdon, PAUSGS gauge · Pennsylvania · 418 ft³/s77°F30 mi7 hrs ago
- CACAPON RIVER NEAR GREAT CACAPON, WVUSGS gauge · West Virginia · 117 ft³/s75°F36 mi7 hrs ago
- Swift Run at Brickcrafter Rd nr New Oxford, PAUSGS gauge · Pennsylvania · 0 ft³/s67°F44 mi6 hrs ago
- SAMS CREEK AT MCKINSTRYS MILL, MDUSGS gauge · Maryland · 3 ft³/s68°F52 mi1 day ago
- POTOMAC RIVER AT POINT OF ROCKS, MDUSGS gauge · Maryland · 3,890 ft³/s78°F54 mi1 day ago
- SOUTH BRANCH POTOMAC RIVER NEAR SPRINGFIELD, WVUSGS gauge · West Virginia · 478 ft³/s75°F55 mi7 hrs ago
- MONOCACY RIVER NEAR DICKERSON, MDUSGS gauge · Maryland · 471 ft³/s75°F57 mi1 day ago
- Fishing Creek at Goldsboro, PAUSGS gauge · Pennsylvania · 6 ft³/s66°F62 mi7 hrs ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
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.