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The Water Around Us
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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 (13 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. MONOCACY RIVER NEAR DICKERSON, MDUSGS gauge · Maryland · 471 ft³/s
    75°F12 mi1 day ago
  2. POTOMAC RIVER AT POINT OF ROCKS, MDUSGS gauge · Maryland · 3,890 ft³/s
    78°F13 mi1 day ago
  3. SAMS CREEK AT MCKINSTRYS MILL, MDUSGS gauge · Maryland · 3 ft³/s
    68°F16 mi1 day ago
  4. DIFFICULT RUN NEAR GREAT FALLS, VAUSGS gauge · Virginia · 13 ft³/s
    73°F34 mi14 hrs ago
  5. Swift Run at Brickcrafter Rd nr New Oxford, PAUSGS gauge · Pennsylvania · 0 ft³/s
    67°F35 mi13 hrs ago
  6. SNAKEDEN BRANCH ABOVE LAKE AUDUBON AT RESTON, VAUSGS gauge · Virginia · 0 ft³/s
    70°F36 mi14 hrs ago
  7. THE GLADE NEAR HOWLAND DRIVE AT RESTON, VAUSGS gauge · Virginia · 0 ft³/s
    68°F36 mi13 hrs ago
  8. DEAD RUN AT WHANN AVENUE NEAR MCLEAN, VAUSGS gauge · Virginia · 0 ft³/s
    71°F36 mi14 hrs ago

Nearest swimmable spots

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

Riverwalk Park4.5(138)

Riverwalk Park

Park · Frederick, Maryland

Park featuring a baseball diamond, a playground, a pavilion, picnic tables, restrooms & more.

2.8 mi from your location

Seneca Creek State Park4.7(2,489)

Seneca Creek State Park

State park · Gaithersburg, Maryland

This 6,300 acre park of forest & farmlands offers hunting, fresh water fishing & hiking trails.

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.