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The Water Around Us
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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 21, 2026 (13 hrs ago).

Clear location
  • Cold · below 60°F · 375
  • Cool · 60–69°F · 594
  • Comfortable · 70–86°F · 938
  • Warm · above 86°F · 229
  • 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. Tongue River at State Line nr Decker MTUSGS gauge · Montana · 67 ft³/s
    71°F63 mi14 hrs ago
  2. Tongue River at Tongue R Dam nr Decker MTUSGS gauge · Montana · 211 ft³/s
    71°F64 mi13 hrs ago
  3. Tongue R bl Brandenberg bridge nr Ashland MTUSGS gauge · Montana · 230 ft³/s
    73°F84 mi14 hrs ago
  4. Tongue River at Miles City, MTUSGS gauge · Montana · 72 ft³/s
    72°F116 mi14 hrs ago
  5. Bighorn River at bridge, at St. Xavier, MTUSGS gauge · Montana · 1,350 ft³/s
    53°F117 mi13 hrs ago
  6. Powder River near Locate MTUSGS gauge · Montana · 4 ft³/s
    63°F120 mi14 hrs ago
  7. SHOSHONE RIVER NEAR LOVELL, WYUSGS gauge · Wyoming · 703 ft³/s
    65°F139 mi14 hrs ago
  8. CHEYENNE RIVER AT RED SHIRT, SDUSGS gauge · South Dakota · 44 ft³/s
    74°F153 mi13 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.