Live · updated daily from USGS
Swimmable water near you
2,137 USGS sensors are reporting a live water temperature right now, the newest reading from August 21, 2026 (11 hrs ago).
- Cold · below 60°F · 375
- Cool · 60–69°F · 595
- Comfortable · 70–86°F · 938
- Warm · above 86°F · 229
- 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.
- 66°F2.2 mi12 hrs ago
- 65°F7.6 mi11 hrs ago
- FLAX POND AT OLD FIELD NYUSGS gauge · New York73°F9.6 mi11 hrs ago
- SAMPAWAMS CREEK AT BABYLON NYUSGS gauge · New York · 35 ft³/s68°F10 mi12 hrs ago
- CARLLS RIVER AT BABYLON NYUSGS gauge · New York · 114 ft³/s70°F10 mi12 hrs ago
- WEST HARBOR AT OYSTER BAY NWR AT BAYVILLE NYUSGS gauge · New York76°F17 mi11 hrs ago
- 75°F19 mi12 hrs ago
- 74°F20 mi11 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(1,698)Cold Spring Harbor State Park
Hilly 40-acre park with harbor vistas, hardwood forest & mountain laurel plus seasonal songbirds.
12 mi from your location
4.4(1,014)Calf Pasture Beach
35-acre area on Long Island Sound with a beach, parkland, recreational areas, fishing pier & cafe.
19 mi from your location
4.4(558)Shady Beach Park
Sandy beach featuring lifeguards & a grassy, tree-shaded picnic area, plus a splash pad & swings.
19 mi from your location
4.5(3,084)Sherwood Island State Park
235 acres on the coast offering beaches for swimming & fishing, plus picnic areas & a 9/11 memorial.
20 mi from your location
4.6(15)Old Mill Beach
Sandy beach overlooking the sound, with a seasonal 1.8-acre park without restrooms or lifeguards.
20 mi from your location
4.5(58)Weed Beach
This 22-acre park features a beach, plus tennis courts, play areas, concessions & a fitness trail.
20 mi from your location
4.6(1,445)Cove Island
Sprawling island park with sand beaches & cycling paths, plus abundant waterfowl & a nature center.
20 mi from your location
4.4(1,119)West Beach
Multi-use park featuring multiple sports fields plus a strip of Long Island Sound beachfront.
21 mi from your location
4.5(69)Pleasure Beach Park
Accessed by water taxi, this remote beach has a boardwalk, info depot, showers & picnic facilities.
22 mi from your location
4.5(5,054)Seaside Park
This 325-acre park features beaches, grassy areas & sports fields, plus an island wildlife preserve.
22 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.