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Live · updated daily from USGS

Swimmable water near you

2,135 USGS sensors are reporting a live water temperature right now, the newest reading from August 22, 2026 (11 hrs ago).

Clear location
  • Cold · below 60°F · 384
  • Cool · 60–69°F · 607
  • Comfortable · 70–86°F · 929
  • Warm · above 86°F · 215
  • 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. CHOPTANK RIVER NEAR GREENSBORO, MDUSGS gauge · Maryland · 46 ft³/s
    76°F18 mi1 day ago
  2. FOSTER BRANCH NEAR JOPPATOWNE, MDUSGS gauge · Maryland · 1 ft³/s
    70°F24 mi1 day ago
  3. SILVER LAKE TRIBUTARY AT MIDDLETOWN, DEUSGS gauge · Delaware · 4 ft³/s
    67°F29 mi1 day ago
  4. PLUMTREE RUN NEAR BEL AIR, MDUSGS gauge · Maryland · 4 ft³/s
    70°F29 mi1 day ago
  5. ST JONES RIVER AT DOVER, DEUSGS gauge · Delaware · 50 ft³/s
    81°F30 mi1 day ago
  6. APPOQUINIMINK RIVER NEAR ODESSA, DEUSGS gauge · Delaware
    80°F34 mi1 day ago
  7. BEAVERDAM BRANCH AT HOUSTON, DEUSGS gauge · Delaware · 13 ft³/s
    71°F34 mi1 day ago
  8. MURDERKILL RIVER AT FREDERICA, DEUSGS gauge · Delaware
    81°F34 mi1 day ago

Nearest swimmable spots

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

Rocky Point Park and Beach4.3(2,055)

Rocky Point Park and Beach

Park · Essex, Maryland
Camping nearby

On 375 acres on the Back & Middle Rivers, this park offers swimming, boating, fishing & picnicking.

19 mi from your location

Gunpowder Falls State Park Hammerman Area4.5(3,496)

Gunpowder Falls State Park Hammerman Area

State park · Middle River, Maryland

Gunpowder River hub for picnics & kayaking, with rentable picnic shelters, fishing & swimming.

21 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.