Live · updated daily from USGS
Swimmable water near you
2,141 USGS sensors are reporting a live water temperature right now, the newest reading from August 22, 2026 (1 hr ago).
- Cold · below 60°F · 385
- Cool · 60–69°F · 607
- Comfortable · 70–86°F · 934
- 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.
- Muddy Creek at Castle Fin, PAUSGS gauge · Pennsylvania · 55 ft³/s69°F1.6 mi2 hrs ago
- Susquehanna River near Peach Bottom, PAUSGS gauge · Pennsylvania80°F4.1 mi2 hrs ago
- SUSQUEHANNA RIVER NEAR DARLINGTON, MDUSGS gauge · Maryland80°F13 mi1 day ago
- Fishing Creek at Craley, PAUSGS gauge · Pennsylvania · 5 ft³/s66°F15 mi2 hrs ago
- Big Spring Run near Mylin Corners, PAUSGS gauge · Pennsylvania · 1 ft³/s61°F17 mi2 hrs ago
- PLUMTREE RUN NEAR BEL AIR, MDUSGS gauge · Maryland · 4 ft³/s70°F18 mi1 day ago
- Kreutz Creek at Strickler, PAUSGS gauge · Pennsylvania · 20 ft³/s69°F21 mi2 hrs ago
- Susquehanna River at Columbia, PAUSGS gauge · Pennsylvania77°F21 mi2 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.