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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 (23 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. Marias River near Loma MTUSGS gauge · Montana · 703 ft³/s
    70°F59 mi23 hrs ago
  2. Marias River at Highway 223 bridge near Chester,MTUSGS gauge · Montana
    62°F64 mi23 hrs ago
  3. Missouri River near Landusky MTUSGS gauge · Montana · 5,820 ft³/s
    73°F67 mi23 hrs ago
  4. Sun River at Simms MTUSGS gauge · Montana · 131 ft³/s
    66°F129 mi23 hrs ago
  5. Smith River bl Eagle Cr nr Fort Logan MTUSGS gauge · Montana · 93 ft³/s
    62°F135 mi23 hrs ago
  6. Milk River at Nashua MTUSGS gauge · Montana · 153 ft³/s
    74°F147 mi1 day ago
  7. Dearborn River near Craig MTUSGS gauge · Montana · 37 ft³/s
    64°F147 mi23 hrs ago
  8. Missouri River bl Holter Dam nr Wolf Cr MTUSGS gauge · Montana · 3,490 ft³/s
    63°F152 mi23 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.