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).
- 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.
- WK-06/19E/31-1301USGS gauge · Wisconsin51°F20 mi19 hrs ago
- FOX RIVER NEAR NEW MUNSTER, WIUSGS gauge · Wisconsin · 469 ft³/s73°F32 mi19 hrs ago
- SWAN CREEK AT LALOR ROAD NEAR FITCHBURG, WIUSGS gauge · Wisconsin · 2 ft³/s59°F34 mi19 hrs ago
- ROOT RIVER AT 60TH ST NEAR CALEDONIA, WIUSGS gauge · Wisconsin71°F36 mi19 hrs ago
- Root River at W. Eight Mile Rd near Caledonia, WIUSGS gauge · Wisconsin · 40 ft³/s71°F37 mi19 hrs ago
- LAKE MONONA AT MADISON, WIUSGS gauge · Wisconsin76°F37 mi19 hrs ago
- WILSON PARK CREEK @ GMIA OUTFALL 7 @ MILWAUKEE,WIUSGS gauge · Wisconsin · 1 ft³/s69°F40 mi19 hrs ago
- SPRING HARBOR STORM SEWER AT MADISON, WIUSGS gauge · Wisconsin · 0 ft³/s69°F41 mi19 hrs ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
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.