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 21, 2026 (14 hrs ago).
- Cold · below 60°F · 375
- Cool · 60–69°F · 594
- Comfortable · 70–86°F · 938
- Warm · above 86°F · 228
- 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.
- Valley Creek at PA Turnpike Br near Valley ForgeUSGS gauge · Pennsylvania · 33 ft³/s67°F1.4 mi14 hrs ago
- Schuylkill River at Norristown, PAUSGS gauge · Pennsylvania · 3,140 ft³/s76°F5.6 mi14 hrs ago
- Stony Creek at Sterigere Street at Norristown, PAUSGS gauge · Pennsylvania · 90 ft³/s69°F6.4 mi14 hrs ago
- French Creek near Phoenixville, PAUSGS gauge · Pennsylvania · 168 ft³/s69°F8.3 mi14 hrs ago
- Perkiomen Creek at Graterford, PAUSGS gauge · Pennsylvania · 228 ft³/s70°F9.0 mi14 hrs ago
- DE 723 Delaware County Observation WellUSGS gauge · Pennsylvania55°F13 mi14 hrs ago
- Wissahickon Creek at Fort Washington, PAUSGS gauge · Pennsylvania · 215 ft³/s70°F13 mi14 hrs ago
- Cobbs Cr at U.S. Hghwy No. 1 at Philadelphia, PAUSGS gauge · Pennsylvania · 3 ft³/s69°F13 mi14 hrs ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.7(3,310)Ridley Creek State Park
Green oasis of woodlands & meadows offering hiking, fishing & picnicking from sunrise to sunset.
10 mi from your location
4.8(1,846)Schuylkill River Park
This park runs along the river & offers a playground, paved paths, sports areas, a pool & a dog run.
18 mi from your location
4.7(560)Green Lane Reservoir
Located on a reservoir, this area offers non-motorized & electric-powered boat use & hiking trails.
19 mi from your location
4.7(1,283)Race Street Pier
Waterfront promenade with a lawn & soaring bridge views drawing joggers, sunbathers & picnickers.
20 mi from your location
Lake Galena
Reservoir with an 8-mi. perimeter, edged by park & hiking, biking & equestrian trails.
20 mi from your location
4.7(1,493)Brandywine Creek State Park
933-acre preserve divided by 19th-century stone walls, with tulip poplar forest & nature center.
21 mi from your location
4.5(1,090)Palmyra Cove Nature Park
250-acre riverfront park features ponds, trails & scenic viewpoints, plus an environmental center.
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.

