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The Water Around Us
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Live · updated daily from USGS

Swimmable water near you

1,325 USGS sensors are reporting a live water temperature right now, the newest reading from August 23, 2026 (1 hr ago).

Clear location
  • Cold · below 60°F · 218
  • Cool · 60–69°F · 484
  • Comfortable · 70–86°F · 545
  • 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.

  1. Madison River near Cameron MTUSGS gauge · Montana · 983 ft³/s
    62°F13 mi2 hrs ago
  2. Madison River at Ennis, MTUSGS gauge · Montana · 931 ft³/s
    61°F20 mi2 hrs ago
  3. Madison River at Kirby Ranch nr Cameron MTUSGS gauge · Montana · 909 ft³/s
    59°F23 mi2 hrs ago
  4. Madison River bl Ennis Lake nr McAllister MTUSGS gauge · Montana · 1,160 ft³/s
    69°F31 mi2 hrs ago
  5. Madison River bl Hebgen Lake nr Grayling MTUSGS gauge · Montana · 760 ft³/s
    60°F34 mi1 hr ago
  6. Ruby River near Twin Bridges MTUSGS gauge · Montana · 56 ft³/s
    63°F34 mi1 hr ago
  7. Beaverhead River at Twin Bridges, MTUSGS gauge · Montana · 238 ft³/s
    63°F36 mi2 hrs ago
  8. Red Rock Cr ab Lakes, nr Lakeview, MTUSGS gauge · Montana · 29 ft³/s
    54°F37 mi2 hrs ago

Nearest swimmable spots

Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.

No rated, photographed swim spots within 25 miles of this point yet. The nearest sensor readings above still tell you what the water is doing — or search any river, lake or beach by name.
Search a spot →

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.