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 (8 hrs ago).
- 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.
- Scioto River near Prospect OHUSGS gauge · Ohio · 2,370 ft³/s73°F33 mi9 hrs ago
- Huron River at Milan OHUSGS gauge · Ohio · 48 ft³/s71°F37 mi8 hrs ago
- Big Walnut Creek at Sunbury OHUSGS gauge · Ohio · 286 ft³/s71°F38 mi8 hrs ago
- Sandusky River near Fremont OHUSGS gauge · Ohio · 525 ft³/s73°F40 mi8 hrs ago
- Alum Creek at Africa OHUSGS gauge · Ohio · 8 ft³/s77°F43 mi9 hrs ago
- Scioto R. at O'Shaughnessy Dam near Dublin OHUSGS gauge · Ohio72°F47 mi9 hrs ago
- Hoover Reservoir at Central College OHUSGS gauge · Ohio79°F47 mi8 hrs ago
- Raccoon Creek near Granville OHUSGS gauge · Ohio · 580 ft³/s70°F52 mi9 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.