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The Water Around Us
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Live · updated daily from USGS

Swimmable water near you

1,325 USGS sensors are reporting a live water temperature right now, the newest reading from August 23, 2026 (49 mins ago).

Clear location
  • Cold · below 60°F · 218
  • Cool · 60–69°F · 484
  • Comfortable · 70–86°F · 545
  • 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.

  1. Maumee River at Antwerp OHUSGS gauge · Ohio · 1,790 ft³/s
    73°F32 mi1 hr ago
  2. Maumee River near Defiance OHUSGS gauge · Ohio · 4,530 ft³/s
    76°F46 mi1 hr ago
  3. Indian Lake at Russells Point OHUSGS gauge · Ohio
    76°F51 mi1 hr ago
  4. Stillwater River at Pleasant Hill OHUSGS gauge · Ohio · 541 ft³/s
    70°F52 mi1 hr ago
  5. Great Miami River at Troy OHUSGS gauge · Ohio · 2,750 ft³/s
    72°F58 mi1 hr ago
  6. Maumee River at Waterville OHUSGS gauge · Ohio · 4,780 ft³/s
    75°F76 mi1 hr ago
  7. Buck Creek bl CJ Brown Reservoir nr Springfield OHUSGS gauge · Ohio
    74°F76 mi1 hr ago
  8. Little Miami River near Oldtown OHUSGS gauge · Ohio · 159 ft³/s
    68°F82 mi1 hr ago

Nearest swimmable spots

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

Grand Lake St. Marys State Park4.4(1,415)

Grand Lake St. Marys State Park

State park · St Marys, Ohio
Camping nearby

Park on the edge of a man-made reservoir, with camping facilities, bike rentals & winter recreation.

22 mi from your location

Grand Lake St Marys State Park4.6(90)

Grand Lake St Marys State Park

Lake · St. Marys Township, Ohio

Park on Grand Lake St. Marys reservoir with a campground, swimming areas, boat ramps & fishing.

24 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.