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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 (18 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. SWAN CREEK AT LALOR ROAD NEAR FITCHBURG, WIUSGS gauge · Wisconsin · 2 ft³/s
    59°F24 mi19 hrs ago
  2. LAKE MONONA AT MADISON, WIUSGS gauge · Wisconsin
    76°F28 mi19 hrs ago
  3. SUGAR RIVER NEAR VERONA, WIUSGS gauge · Wisconsin · 39 ft³/s
    62°F30 mi19 hrs ago
  4. BADGER MILL CREEK AT VERONA, WIUSGS gauge · Wisconsin · 5 ft³/s
    59°F31 mi19 hrs ago
  5. SPRING HARBOR STORM SEWER AT MADISON, WIUSGS gauge · Wisconsin · 0 ft³/s
    69°F31 mi19 hrs ago
  6. PHEASANT BRANCH AT MIDDLETON, WIUSGS gauge · Wisconsin · 2 ft³/s
    69°F34 mi19 hrs ago
  7. WK-06/19E/31-1301USGS gauge · Wisconsin
    51°F36 mi19 hrs ago
  8. BLACK EARTH CREEK NR BREWERY RD AT CROSS PLAINS,WIUSGS gauge · Wisconsin · 8 ft³/s
    55°F40 mi19 hrs ago

Nearest swimmable spots

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

Lake Kegonsa State Park4.4(1,030)

Lake Kegonsa State Park

State park · Stoughton, Wisconsin
Camping nearby

Picturesque park with prairie, forest & marsh habitats plus a lake for swimming, fishing & boating.

18 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.