Live · updated daily from USGS
Swimmable water near you
1,324 USGS sensors are reporting a live water temperature right now, the newest reading from August 23, 2026 (9 hrs ago).
- Cold · below 60°F · 218
- Cool · 60–69°F · 484
- Comfortable · 70–86°F · 544
- 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.
- Brandywine Creek at Chadds Ford, PAUSGS gauge · Pennsylvania · 356 ft³/s71°F6.3 mi9 hrs ago
- Delaware River at Marcus Hook, PAUSGS gauge · Pennsylvania80°F8.8 mi10 hrs ago
- DE 723 Delaware County Observation WellUSGS gauge · Pennsylvania55°F11 mi9 hrs ago
- White Clay Creek near Strickersville, PAUSGS gauge · Pennsylvania · 39 ft³/s69°F11 mi9 hrs ago
- Trout Run at Avondale, PAUSGS gauge · Pennsylvania · 10 ft³/s68°F11 mi9 hrs ago
- DELAWARE RIVER AT CHESTER PAUSGS gauge · Pennsylvania80°F12 mi10 hrs ago
- West Branch White Clay Creek near Chesterville, PAUSGS gauge · Pennsylvania · 49 ft³/s68°F12 mi10 hrs ago
- EB White Clay Creek Trib near London Grove, PAUSGS gauge · Pennsylvania · 18 ft³/s66°F13 mi9 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(1,493)Brandywine Creek State Park
933-acre preserve divided by 19th-century stone walls, with tulip poplar forest & nature center.
1.8 mi from your location
4.6(28)Brandywine Creek
A Revolutionary War battle area, this landmark creek features historic sites & outdoor recreation.
3.9 mi from your location
3.9(91)Deemers Beach
Riverfront area with a simple stretch of coarse sand used as a fishing spot, plus nearby parking.
8.8 mi from your location
4.8(122)Newark Reservoir
Reservoir lake surrounded by a paved waterfront walking trail with access to an adjacent park.
11 mi from your location
4.7(3,310)Ridley Creek State Park
Green oasis of woodlands & meadows offering hiking, fishing & picnicking from sunrise to sunset.
14 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.



