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 (23 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.
- Pequest River at Pequest NJUSGS gauge · New Jersey · 448 ft³/s66°F10 mi1 day ago
- 81°F16 mi1 day ago
- Spruce Run Reservoir at Clinton NJUSGS gauge · New Jersey74°F17 mi23 hrs ago
- Pequannock River at Oak Ridge NJUSGS gauge · New Jersey · 6 ft³/s59°F20 mi1 day ago
- Whippany River near Pine Brook NJUSGS gauge · New Jersey · 192 ft³/s71°F23 mi1 day ago
- Raritan River at Manville NJUSGS gauge · New Jersey · 2,240 ft³/s72°F24 mi1 day ago
- Canoe Brook near Summit NJUSGS gauge · New Jersey · 142 ft³/s69°F24 mi1 day ago
- Pohatcong Crk at Creek Rd nr Carpentersville NJUSGS gauge · New Jersey · 152 ft³/s66°F25 mi1 day ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.6(319)Lake Hopatcong
Bustling recreational lake for boating, water skiing & swimming, with waterfront eateries & bars.
10 mi from your location
Indian Lake
This popular, 99-acre lake features 3 beaches with seasonal lifeguards, boating, fishing & swimming.
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.

