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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 (51 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. SUSQUEHANNA RIVER NEAR DARLINGTON, MDUSGS gauge · Maryland
    79°F20 mi1 hr ago
  2. White Clay Creek near Strickersville, PAUSGS gauge · Pennsylvania · 39 ft³/s
    69°F21 mi1 hr ago
  3. West Branch White Clay Creek near Chesterville, PAUSGS gauge · Pennsylvania · 49 ft³/s
    68°F22 mi1 hr ago
  4. Trout Run at Avondale, PAUSGS gauge · Pennsylvania · 10 ft³/s
    68°F26 mi1 hr ago
  5. Middle Branch White Clay Creek near West Grove,PAUSGS gauge · Pennsylvania · 77 ft³/s
    67°F26 mi1 hr ago
  6. FOSTER BRANCH NEAR JOPPATOWNE, MDUSGS gauge · Maryland · 11 ft³/s
    72°F26 mi1 hr ago
  7. PLUMTREE RUN NEAR BEL AIR, MDUSGS gauge · Maryland · 9 ft³/s
    70°F27 mi1 hr ago
  8. Cohansey River at Greenwich NJUSGS gauge · New Jersey
    80°F27 mi58 mins ago

Nearest swimmable spots

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

Lums Pond State Park4.7(3,435)

Lums Pond State Park

State park · Bear, Delaware
Camping nearby

1,790-acre preserve featuring freshwater pond, multipurpose trails, fishing, boat rentals & more.

10 mi from your location

Newark Reservoir4.8(122)

Newark Reservoir

Lake · Newark, Delaware

Reservoir lake surrounded by a paved waterfront walking trail with access to an adjacent park.

18 mi from your location

Deemers Beach3.9(91)

Deemers Beach

Beach · Delaware

Riverfront area with a simple stretch of coarse sand used as a fishing spot, plus nearby parking.

20 mi from your location

Riverview Beach Park4.6(1,275)

Riverview Beach Park

Park · Pennsville, New Jersey

A historic waterfront park along the Delaware River in Pennsville, New Jersey, Riverview Beach Park has been a community gathering spot since the early 1900s. The park offers a sandy beach, playground, picnic areas, walking paths, and expansive river views. A seasonal splash pad and open green space make it a popular family destination, while the waterfront promenade provides scenic views of passing ships and the Delaware Memorial Bridge.

23 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.