Live · updated daily from USGS
Swimmable water near you
1,324 USGS sensors are reporting a live water temperature right now, the newest reading from August 23, 2026 (10 hrs ago).
- Cold · below 60°F · 218
- Cool · 60–69°F · 484
- Comfortable · 70–86°F · 544
- Warm · above 86°F · 78
- 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.
- CACAPON RIVER NEAR GREAT CACAPON, WVUSGS gauge · West Virginia · 107 ft³/s76°F21 mi10 hrs ago
- POTOMAC RIVER AT POINT OF ROCKS, MDUSGS gauge · Maryland · 3,490 ft³/s77°F36 mi11 hrs ago
- MONOCACY RIVER NEAR DICKERSON, MDUSGS gauge · Maryland · 341 ft³/s74°F40 mi10 hrs ago
- SOUTH BRANCH POTOMAC RIVER NEAR SPRINGFIELD, WVUSGS gauge · West Virginia · 534 ft³/s75°F42 mi10 hrs ago
- SAMS CREEK AT MCKINSTRYS MILL, MDUSGS gauge · Maryland · 38 ft³/s68°F43 mi10 hrs ago
- Swift Run at Brickcrafter Rd nr New Oxford, PAUSGS gauge · Pennsylvania · 42 ft³/s68°F46 mi10 hrs ago
- Rays Br Juniata R bl Rays Dam nr Huntingdon, PAUSGS gauge · Pennsylvania · 414 ft³/s77°F50 mi10 hrs ago
- N F SHENANDOAH RIVER NEAR STRASBURG, VAUSGS gauge · Virginia · 181 ft³/s77°F54 mi10 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.

