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The Water Around Us
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Live · updated daily from USGS

Swimmable water near you

2,137 USGS sensors are reporting a live water temperature right now, the newest reading from August 21, 2026 (10 hrs ago).

Clear location
  • Cold · below 60°F · 375
  • Cool · 60–69°F · 595
  • 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. KOOTENAI RIVER AT LEONIA, IDUSGS gauge · Idaho · 9,640 ft³/s
    57°F41 mi10 hrs ago
  2. KOOTENAI RIVER AT BONNERS FERRY IDUSGS gauge · Idaho
    57°F52 mi10 hrs ago
  3. Clark Fork near Paradise, MTUSGS gauge · Montana
    67°F64 mi10 hrs ago
  4. Flathead River at Columbia Falls MTUSGS gauge · Montana · 4,730 ft³/s
    60°F70 mi10 hrs ago
  5. Flathead River at Perma MTUSGS gauge · Montana · 6,040 ft³/s
    71°F71 mi10 hrs ago
  6. Flathead River near Polson MTUSGS gauge · Montana · 5,590 ft³/s
    71°F71 mi10 hrs ago
  7. Clark Fork at Superior, MTUSGS gauge · Montana
    64°F71 mi10 hrs ago
  8. KOOTENAI RIVER AT PORTHILL IDUSGS gauge · Idaho · 8,940 ft³/s
    62°F74 mi10 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.