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 (2 hrs 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.
- Cape May Harbor at Cape May NJUSGS gauge · New Jersey75°F43 mi2 hrs ago
- CHOPTANK RIVER NEAR GREENSBORO, MDUSGS gauge · Maryland · 81 ft³/s74°F46 mi2 hrs ago
- 090089-- Oyster Lab 4 ObsUSGS gauge · New Jersey58°F50 mi2 hrs ago
- Great Channel at Stone Harbor NJUSGS gauge · New Jersey78°F53 mi3 hrs ago
- Maurice River at Bivalve NJUSGS gauge · New Jersey79°F58 mi2 hrs ago
- Ludlum Thorofare at Sea Isle City NJUSGS gauge · New Jersey78°F61 mi3 hrs ago
- Maurice R at Mauricetown NJUSGS gauge · New Jersey79°F62 mi2 hrs ago
- Cohansey River at Greenwich NJUSGS gauge · New Jersey80°F66 mi2 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.
10 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.
15 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.
15 mi from your location
4.7(3,218)Bethany Beach Boardwalk
This wooden boardwalk lined with charming clapboard houses goes past a plaza with a bandstand.
17 mi from your location
4.7(98)Bethany Beach
Relaxed, sandy town beach featuring a wooden boardwalk lined with shops & eateries.
17 mi from your location
4.6(1,082)Delaware Seashore State Park
Built in 1876, this restored, historic home offers period artifacts, history exhibits & a gift shop.
19 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.