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 (6 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.
- Gallatin River above Deer Creek, near Big Sky, MTUSGS gauge · Montana · 341 ft³/s56°F17 mi6 hrs ago
- Madison River near Norris MTUSGS gauge · Montana · 1,160 ft³/s66°F20 mi6 hrs ago
- Madison River bl Ennis Lake nr McAllister MTUSGS gauge · Montana · 1,160 ft³/s69°F22 mi6 hrs ago
- Gallatin River at Logan MTUSGS gauge · Montana · 368 ft³/s64°F27 mi6 hrs ago
- Madison River at Ennis, MTUSGS gauge · Montana · 931 ft³/s61°F29 mi6 hrs ago
- Willow Creek near Harrison MTUSGS gauge · Montana · 6 ft³/s59°F30 mi6 hrs ago
- Yellowstone River near Livingston, MTUSGS gauge · Montana · 2,160 ft³/s64°F30 mi6 hrs ago
- Jefferson River near Three Forks MTUSGS gauge · Montana · 384 ft³/s69°F32 mi6 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.