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 (7 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.
- Madison River near Norris MTUSGS gauge · Montana · 1,210 ft³/s66°F17 mi1 day ago
- Gallatin River above Deer Creek, near Big Sky, MTUSGS gauge · Montana · 274 ft³/s57°F18 mi1 day ago
- Madison River bl Ennis Lake nr McAllister MTUSGS gauge · Montana · 1,200 ft³/s68°F21 mi1 day ago
- Gallatin River at Logan MTUSGS gauge · Montana · 392 ft³/s64°F25 mi1 day ago
- Willow Creek near Harrison MTUSGS gauge · Montana · 7 ft³/s59°F28 mi1 day ago
- Madison River at Ennis, MTUSGS gauge · Montana · 888 ft³/s63°F28 mi1 day ago
- Jefferson River near Three Forks MTUSGS gauge · Montana · 444 ft³/s70°F30 mi1 day ago
- Yellowstone River near Livingston, MTUSGS gauge · Montana · 2,200 ft³/s65°F32 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.