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The Water Around Us
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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 (17 hrs ago).

Clear location
  • 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.

  1. Madison River near West Yellowstone, MTUSGS gauge · Montana · 296 ft³/s
    65°F10.0 mi17 hrs ago
  2. Madison River bl Hebgen Lake nr Grayling MTUSGS gauge · Montana · 760 ft³/s
    61°F14 mi17 hrs ago
  3. Red Rock Cr ab Lakes, nr Lakeview, MTUSGS gauge · Montana · 25 ft³/s
    54°F18 mi17 hrs ago
  4. Gibbon River at Madison Jct, YNPUSGS gauge · Wyoming · 76 ft³/s
    65°F20 mi18 hrs ago
  5. Firehole River near West Yellowstone MTUSGS gauge · Wyoming · 192 ft³/s
    73°F20 mi18 hrs ago
  6. Madison River at Kirby Ranch nr Cameron MTUSGS gauge · Montana · 875 ft³/s
    57°F21 mi17 hrs ago
  7. Firehole River at Old Faithful, YNPUSGS gauge · Wyoming · 38 ft³/s
    59°F26 mi18 hrs ago
  8. Tantalus Creek at Norris Junction, YNPUSGS gauge · Wyoming · 2 ft³/s
    79°F28 mi17 hrs 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.

6.0 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.