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 (21 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.
- MILLSBORO POND OUTLET AT MILLSBORO, DEUSGS gauge · Delaware · 52 ft³/s82°F21 mi22 hrs ago
- MASSEY DITCH AT MASSEY LANDING, DEUSGS gauge · Delaware78°F27 mi22 hrs ago
- BUCKS BRANCH DS OF CONRAIL RD AT CANNON, DEUSGS gauge · Delaware71°F30 mi22 hrs ago
- BROADKILL RIVER NEAR MILTON, DEUSGS gauge · Delaware82°F34 mi21 hrs ago
- BEAVERDAM BRANCH AT HOUSTON, DEUSGS gauge · Delaware · 13 ft³/s71°F43 mi22 hrs ago
- MURDERKILL RIVER AT FREDERICA, DEUSGS gauge · Delaware81°F49 mi22 hrs ago
- Cape May Harbor at Cape May NJUSGS gauge · New Jersey76°F52 mi21 hrs ago
- CHOPTANK RIVER NEAR GREENSBORO, MDUSGS gauge · Maryland · 46 ft³/s76°F53 mi22 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(1,519)Trap Pond State Park
Wetland forest with cypress trees features a nature center, trails & a pond for boating & fishing.
17 mi from your location
4.7(1,397)Ocean City Beach
Extensive, 10-mile-long public beach with water sports, a boardwalk & an amusement park.
17 mi from your location
4.7(2,251)Fenwick Island State Park
344 acres of shoreline on a barrier island featuring swimming areas & designated surfing spots.
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.