Live · updated daily from USGS
Swimmable water near you
1,325 USGS sensors are reporting a live water temperature right now, the newest reading from August 23, 2026 (1 hr ago).
- Cold · below 60°F · 218
- Cool · 60–69°F · 484
- Comfortable · 70–86°F · 545
- 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.
- SUSQUEHANNA RIVER NEAR DARLINGTON, MDUSGS gauge · Maryland79°F15 mi1 hr ago
- White Clay Creek near Strickersville, PAUSGS gauge · Pennsylvania · 39 ft³/s69°F19 mi1 hr ago
- West Branch White Clay Creek near Chesterville, PAUSGS gauge · Pennsylvania · 49 ft³/s68°F20 mi2 hrs ago
- PLUMTREE RUN NEAR BEL AIR, MDUSGS gauge · Maryland · 9 ft³/s70°F22 mi1 hr ago
- FOSTER BRANCH NEAR JOPPATOWNE, MDUSGS gauge · Maryland · 11 ft³/s72°F23 mi1 hr ago
- Middle Branch White Clay Creek near West Grove,PAUSGS gauge · Pennsylvania · 77 ft³/s67°F23 mi2 hrs ago
- Trout Run at Avondale, PAUSGS gauge · Pennsylvania · 10 ft³/s68°F24 mi2 hrs ago
- EB White Clay Creek Trib near London Grove, PAUSGS gauge · Pennsylvania · 18 ft³/s66°F26 mi1 hr ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.7(3,435)Lums Pond State Park
1,790-acre preserve featuring freshwater pond, multipurpose trails, fishing, boat rentals & more.
12 mi from your location
4.8(122)Newark Reservoir
Reservoir lake surrounded by a paved waterfront walking trail with access to an adjacent park.
17 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.
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.

