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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 (9 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. YANKEE FORK SALMON RIVER NR CLAYTON IDUSGS gauge · Idaho · 71 ft³/s
    55°F32 mi10 hrs ago
  2. SF BOISE RIVER AT NEAL BRIDGE NR ARROWROCK DAM IDUSGS gauge · Idaho
    58°F38 mi9 hrs ago
  3. SF BOISE RIVER AT ANDERSON RANCH DAM IDUSGS gauge · Idaho · 807 ft³/s
    50°F45 mi10 hrs ago
  4. SNAKE RIVER AT KING HILL IDUSGS gauge · Idaho · 6,470 ft³/s
    67°F67 mi10 hrs ago
  5. SILVER CREEK AT SPORTSMAN ACCESS NR PICABO IDUSGS gauge · Idaho · 93 ft³/s
    63°F71 mi10 hrs ago
  6. BOISE RIVER AT CALDWELL, IDUSGS gauge · Idaho · 371 ft³/s
    70°F77 mi9 hrs ago
  7. BOISE RIVER ABV INDIAN CREEK AT CALDWELL, IDUSGS gauge · Idaho
    70°F77 mi10 hrs ago
  8. BOISE RIVER NR PARMA IDUSGS gauge · Idaho · 412 ft³/s
    73°F88 mi10 hrs ago

Nearest swimmable spots

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

Sawtooth Lake4.9(44)

Sawtooth Lake

Lake · Idaho

Picturesque, high-altitude lake featuring camping, trout fishing & well-maintained hiking trails.

16 mi from your location

Redfish Lake4.8(268)

Redfish Lake

Lake · Idaho
Camping nearby

Scenic site in the mountains offering fishing, canoeing & kayaking, plus hiking, biking & a lodge.

18 mi from your location

Stanley Lake4.8(116)

Stanley Lake

Lake · Idaho
Camping nearby

High-altitude lake with views of the Sawtooth Mountains, popular for angling & waterside campsites.

21 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.