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 (1 day 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.
- Yellowstone River at Corwin Springs MTUSGS gauge · Montana · 2,090 ft³/s66°F5.7 mi1 day ago
- Gallatin River above Deer Creek, near Big Sky, MTUSGS gauge · Montana · 274 ft³/s57°F18 mi1 day ago
- Lamar River nr Tower Ranger Station YNPUSGS gauge · Wyoming · 212 ft³/s64°F29 mi1 day ago
- Madison River bl Hebgen Lake nr Grayling MTUSGS gauge · Montana · 760 ft³/s61°F30 mi1 day ago
- Tantalus Creek at Norris Junction, YNPUSGS gauge · Wyoming · 2 ft³/s79°F31 mi1 day ago
- Yellowstone River near Livingston, MTUSGS gauge · Montana · 2,200 ft³/s65°F34 mi1 day ago
- Madison River near West Yellowstone, MTUSGS gauge · Montana · 296 ft³/s65°F36 mi1 day ago
- Gibbon River at Madison Jct, YNPUSGS gauge · Wyoming · 76 ft³/s65°F36 mi1 day 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.