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 (10 hrs ago).
- 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.
- SILVER LAKE TRIBUTARY AT MIDDLETOWN, DEUSGS gauge · Delaware · 4 ft³/s67°F14 mi1 day ago
- SUSQUEHANNA RIVER NEAR DARLINGTON, MDUSGS gauge · Maryland80°F16 mi1 day ago
- CHRISTINA RIVER AT COOCHS BRIDGE, DEUSGS gauge · Delaware · 38 ft³/s73°F18 mi1 day ago
- APPOQUINIMINK RIVER NEAR ODESSA, DEUSGS gauge · Delaware80°F19 mi1 day ago
- C AND D CANAL NR DELAWARE CITY, DEUSGS gauge · Delaware · 14,400 ft³/s83°F20 mi1 day ago
- FOSTER BRANCH NEAR JOPPATOWNE, MDUSGS gauge · Maryland · 1 ft³/s70°F20 mi1 day ago
- WHITE CLAY CREEK AT NEWARK, DEUSGS gauge · Delaware · 119 ft³/s71°F20 mi1 day ago
- PLUMTREE RUN NEAR BEL AIR, MDUSGS gauge · Maryland · 4 ft³/s70°F20 mi1 day 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.
15 mi from your location
4.8(122)Newark Reservoir
Reservoir lake surrounded by a paved waterfront walking trail with access to an adjacent park.
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.

