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.
- 70°F16 mi12 hrs ago
- 75°F16 mi12 hrs ago
- 75°F18 mi12 hrs ago
- 75°F24 mi12 hrs ago
- 74°F28 mi11 hrs ago
- WEST HARBOR AT OYSTER BAY NWR AT BAYVILLE NYUSGS gauge · New York76°F28 mi11 hrs ago
- EAST CREEK AT SANDS POINT NYUSGS gauge · New York75°F32 mi11 hrs ago
- FLAX POND AT OLD FIELD NYUSGS gauge · New York73°F32 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(27)East Branch Reservoir
525-acre, tree-ringed water reservoir with miles of hiking trails on the western edge.
6.2 mi from your location
4.7(30)Croton Falls Reservoir
Artificial lake, part of NYC's water supply, with boating, marinas & fishing for brown trout.
7.0 mi from your location
4.7(129)Mianus River Gorge Preserve
Large, old-growth forest nature preserve with miles of hiking trails, open Apr–Nov.
9.2 mi from your location
4.5(142)Wonder Lake State Park
Rugged, scenic park with lakes & ponds features 9 miles of trails for hiking & horseback riding.
14 mi from your location
4.7(87)New Croton Reservoir
Reservoir holding a dammed 9-mi. stretch of river since 1905 & supplying drinking water to NYC.
15 mi from your location
4.8(719)Teatown Lake Reservation
1,000-acre parkland offering 15 mi. of hiking trails & an indoor/outdoor nature education center.
15 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.
18 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.
18 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.
18 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.
18 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.