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 (12 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.
- Pequannock River at Oak Ridge NJUSGS gauge · New Jersey · 6 ft³/s59°F13 mi13 hrs ago
- Pequest River at Pequest NJUSGS gauge · New Jersey · 448 ft³/s66°F17 mi13 hrs ago
- Delaware River at Montague NJUSGS gauge · Pennsylvania · 3,610 ft³/s70°F22 mi12 hrs ago
- Whippany River near Pine Brook NJUSGS gauge · New Jersey · 192 ft³/s71°F23 mi13 hrs ago
- Ramapo River at Pompton Lakes NJUSGS gauge · New Jersey · 582 ft³/s75°F24 mi12 hrs ago
- 75°F24 mi12 hrs ago
- Ramapo River above dam at Pompton Lakes NJUSGS gauge · New Jersey75°F24 mi12 hrs ago
- Brodhead Creek near Analomink, PAUSGS gauge · Pennsylvania · 153 ft³/s62°F25 mi13 hrs 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.
6.6 mi from your location
Indian Lake
This popular, 99-acre lake features 3 beaches with seasonal lifeguards, boating, fishing & swimming.
15 mi from your location
Wallkill River National Wildlife Refuge
Wildlife habitat known for its diversity of birds with hunting, fishing, trails & learning programs.
17 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.


