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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 22, 2026 (12 hrs ago).

Clear location
  • Cold · below 60°F · 384
  • Cool · 60–69°F · 607
  • Comfortable · 70–86°F · 929
  • Warm · above 86°F · 215
  • 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. Missouri River bl Holter Dam nr Wolf Cr MTUSGS gauge · Montana · 3,490 ft³/s
    63°F12 mi1 day ago
  2. Dearborn River near Craig MTUSGS gauge · Montana · 37 ft³/s
    64°F27 mi1 day ago
  3. Smith River bl Eagle Cr nr Fort Logan MTUSGS gauge · Montana · 93 ft³/s
    62°F36 mi1 day ago
  4. Clark Fork ab Little Blackfoot R nr Garrison MTUSGS gauge · Montana · 116 ft³/s
    65°F45 mi1 day ago
  5. Sun River at Simms MTUSGS gauge · Montana · 131 ft³/s
    66°F47 mi1 day ago
  6. Clark Fork at Deer Lodge MTUSGS gauge · Montana · 105 ft³/s
    63°F48 mi1 day ago
  7. Missouri River at Toston MTUSGS gauge · Montana · 1,820 ft³/s
    69°F53 mi1 day ago
  8. NF Blackfoot R ab Dry Gulch nr Ovando MTUSGS gauge · Montana · 233 ft³/s
    51°F55 mi1 day ago

Nearest swimmable spots

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

Lake Helena4.2(26)

Lake Helena

Lake · Helena Valley Northeast, Montana

Picturesque lake for waterfront scenery, including bird watching & mountain views.

8.7 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.