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 (17 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.
- Crosswicks Creek at Extonville NJUSGS gauge · New Jersey · 119 ft³/s72°F10 mi17 hrs ago
- Delaware and Raritan Canal at Port Mercer NJUSGS gauge · New Jersey · 122 ft³/s76°F11 mi17 hrs ago
- 75°F15 mi17 hrs ago
- Delaware River at Trenton NJUSGS gauge · New Jersey · 8,330 ft³/s75°F15 mi17 hrs ago
- Millstone River at Blackwells Mills NJUSGS gauge · New Jersey · 902 ft³/s73°F16 mi17 hrs ago
- Crosswicks Ck at Hockamik Rd near Cookstown NJUSGS gauge · New Jersey · 34 ft³/s73°F16 mi17 hrs ago
- 78°F17 mi17 hrs ago
- D&R Ca feeder US of gate at Washington Crossing NJUSGS gauge · New Jersey · 127 ft³/s76°F20 mi18 hrs ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.4(136)Perrineville Lake Park
This large natural area features multi-use trails, wildlife viewing & a fishing pond.
3.5 mi from your location
Carnegie Lake
Sprawling reservoir in wooded surrounds, popular among rowers, anglers & ice skaters.
9.6 mi from your location
4.8(1,597)Manasquan Reservoir
Park with a multi-use trail around a reservoir, plus water recreation such as boating & fishing.
16 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.
