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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 (18 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. French Creek near Phoenixville, PAUSGS gauge · Pennsylvania · 40 ft³/s
    69°F2.6 mi18 hrs ago
  2. Valley Creek at PA Turnpike Br near Valley ForgeUSGS gauge · Pennsylvania · 16 ft³/s
    65°F11 mi18 hrs ago
  3. Perkiomen Creek at Graterford, PAUSGS gauge · Pennsylvania · 133 ft³/s
    73°F12 mi18 hrs ago
  4. East Branch Brandywine Creek below Downingtown, PAUSGS gauge · Pennsylvania · 77 ft³/s
    69°F13 mi18 hrs ago
  5. Manatawny Creek near Spangsville, PAUSGS gauge · Pennsylvania · 27 ft³/s
    69°F13 mi18 hrs ago
  6. Birch Run near Wagontown, PAUSGS gauge · Pennsylvania · 2 ft³/s
    66°F14 mi18 hrs ago
  7. West Branch Brandywine Creek at Coatesville, PAUSGS gauge · Pennsylvania · 32 ft³/s
    69°F15 mi19 hrs ago
  8. Schuylkill River at Norristown, PAUSGS gauge · Pennsylvania · 1,610 ft³/s
    77°F16 mi18 hrs ago

Nearest swimmable spots

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

Green Lane Reservoir4.7(560)

Green Lane Reservoir

Park · Pennsburg, Pennsylvania

Located on a reservoir, this area offers non-motorized & electric-powered boat use & hiking trails.

17 mi from your location

Ridley Creek State Park4.7(3,310)

Ridley Creek State Park

State park · Media, Pennsylvania

Green oasis of woodlands & meadows offering hiking, fishing & picnicking from sunrise to sunset.

18 mi from your location

Brandywine Creek State Park4.7(1,493)

Brandywine Creek State Park

State park · Wilmington, Delaware

933-acre preserve divided by 19th-century stone walls, with tulip poplar forest & nature center.

25 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.