Live · updated daily from USGS
Swimmable water near you
1,324 USGS sensors are reporting a live water temperature right now, the newest reading from August 23, 2026 (7 hrs ago).
- Cold · below 60°F · 218
- Cool · 60–69°F · 484
- Comfortable · 70–86°F · 544
- Warm · above 86°F · 78
- 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.
- Indian Lake at Russells Point OHUSGS gauge · Ohio76°F25 mi8 hrs ago
- Stillwater River at Pleasant Hill OHUSGS gauge · Ohio · 541 ft³/s70°F42 mi7 hrs ago
- Maumee River near Defiance OHUSGS gauge · Ohio · 4,530 ft³/s76°F43 mi8 hrs ago
- Maumee River at Antwerp OHUSGS gauge · Ohio · 1,790 ft³/s73°F44 mi8 hrs ago
- Great Miami River at Troy OHUSGS gauge · Ohio · 2,750 ft³/s72°F44 mi8 hrs ago
- 74°F57 mi8 hrs ago
- Scioto River near Prospect OHUSGS gauge · Ohio · 3,060 ft³/s73°F59 mi8 hrs ago
- Maumee River at Waterville OHUSGS gauge · Ohio · 4,780 ft³/s75°F65 mi8 hrs ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.4(1,415)Grand Lake St. Marys State Park
Park on the edge of a man-made reservoir, with camping facilities, bike rentals & winter recreation.
12 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.