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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 (10 hrs ago).

Clear location
  • 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.

  1. Rays Br Juniata R bl Rays Dam nr Huntingdon, PAUSGS gauge · Pennsylvania · 418 ft³/s
    77°F28 mi11 hrs ago
  2. CACAPON RIVER NEAR GREAT CACAPON, WVUSGS gauge · West Virginia · 149 ft³/s
    76°F33 mi11 hrs ago
  3. SOUTH BRANCH POTOMAC RIVER NEAR SPRINGFIELD, WVUSGS gauge · West Virginia · 586 ft³/s
    75°F49 mi11 hrs ago
  4. Conemaugh River at Seward, PAUSGS gauge · Pennsylvania · 2,670 ft³/s
    67°F52 mi10 hrs ago
  5. Swift Run at Brickcrafter Rd nr New Oxford, PAUSGS gauge · Pennsylvania · 0 ft³/s
    68°F57 mi10 hrs ago
  6. Casselman River at Markleton, PAUSGS gauge · Pennsylvania · 1,900 ft³/s
    65°F58 mi11 hrs ago
  7. SAVAGE RIVER NEAR BARTON, MDUSGS gauge · Maryland · 46 ft³/s
    64°F60 mi11 hrs ago
  8. Blacklick Creek at Josephine, PAUSGS gauge · Pennsylvania · 2,450 ft³/s
    65°F62 mi10 hrs ago

Nearest swimmable spots

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

Trough Creek State Park4.8(902)

Trough Creek State Park

Tourist attraction · James Creek, Pennsylvania
Camping nearby

A 541-acre gem in south-central Pennsylvania where Great Trough Creek carves through a scenic gorge in Terrace Mountain before emptying into Raystown Lake. The park's most famous feature is Balanced Rock — a boulder hanging precariously off a ledge throughout recorded history. Rainbow Falls, a 15-20 foot cascade on Abbott Run, is best after heavy rain. A swaying suspension bridge crosses the creek, and the yellow-orange Copperas Rock overhang showcases weathered iron formations. Rugged trails with excellent overlook views.

19 mi from your location

Raystown Lake Recreation Area4.7(916)

Raystown Lake Recreation Area

Park · Hesston, Pennsylvania
Camping nearby

Natural area featuring an 8,300-acre lake with boating & fishing, plus hiking & summertime concerts.

20 mi from your location

Raystown Lake4.7(519)

Raystown Lake

Lake · Pennsylvania

Completed in 1973, the state's largest lake offers swimming, fishing, boat launches & hiking trails.

22 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.