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 (19 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.
- Raritan River at Manville NJUSGS gauge · New Jersey · 2,240 ft³/s72°F3.5 mi19 hrs ago
- Millstone River at Blackwells Mills NJUSGS gauge · New Jersey · 902 ft³/s73°F7.0 mi19 hrs ago
- 78°F10 mi19 hrs ago
- Spruce Run Reservoir at Clinton NJUSGS gauge · New Jersey74°F15 mi19 hrs ago
- 81°F16 mi19 hrs ago
- Delaware and Raritan Canal at Port Mercer NJUSGS gauge · New Jersey · 122 ft³/s76°F18 mi19 hrs ago
- Canoe Brook near Summit NJUSGS gauge · New Jersey · 142 ft³/s69°F20 mi19 hrs ago
- Arthur Kill at Perth Amboy NJUSGS gauge · New Jersey75°F21 mi19 hrs ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.5(399)Riverside Park
Riverside public green space with picnic tables, a pavilion, a boat launch & shade trees.
7.5 mi from your location
Carnegie Lake
Sprawling reservoir in wooded surrounds, popular among rowers, anglers & ice skaters.
15 mi from your location
4.6(1,318)Echo Lake Park
Park with lots of room for sports, from ice-skating to softball, plus a snack bar for refueling.
18 mi from your location
4.5(565)Speedwell Lake Park
Green space with a playground & an open field, plus a waterfall & fishing lake with a walking trail.
20 mi from your location
4.6(2,964)Rahway River Park
Park with a wide range of athletic & recreational facilities, including an outdoor swimming pool.
20 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.
