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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 (50 mins 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. Red Rock Cr ab Lakes, nr Lakeview, MTUSGS gauge · Montana · 29 ft³/s
    54°F6.3 mi1 hr ago
  2. Madison River bl Hebgen Lake nr Grayling MTUSGS gauge · Montana · 760 ft³/s
    60°F20 mi1 hr ago
  3. Madison River at Kirby Ranch nr Cameron MTUSGS gauge · Montana · 909 ft³/s
    59°F20 mi1 hr ago
  4. Madison River near West Yellowstone, MTUSGS gauge · Montana · 296 ft³/s
    66°F22 mi1 hr ago
  5. Firehole River near West Yellowstone MTUSGS gauge · Wyoming · 200 ft³/s
    72°F31 mi1 hr ago
  6. Gibbon River at Madison Jct, YNPUSGS gauge · Wyoming · 75 ft³/s
    65°F32 mi1 hr ago
  7. Firehole River at Old Faithful, YNPUSGS gauge · Wyoming · 43 ft³/s
    59°F35 mi1 hr ago
  8. Tantalus Creek at Norris Junction, YNPUSGS gauge · Wyoming · 2 ft³/s
    80°F40 mi1 hr ago

Nearest swimmable spots

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

Henrys Lake State Park4.6(670)

Henrys Lake State Park

Park · Island Park, Idaho
Camping nearby

585-acre sprawling park includes campsites, hiking trails, fishing & boating, plus native wildlife.

6.6 mi from your location

Red Rock Lakes National Wildlife Refuge4.4(79)

Red Rock Lakes National Wildlife Refuge

Wildlife refuge · Lima, Montana

Mountains provide a scenic backdrop to this remote refuge meant for viewing wildlife & nature.

15 mi from your location

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.