Live · updated daily from USGS
Swimmable water near you
2,136 USGS sensors are reporting a live water temperature right now, the newest reading from August 22, 2026 (8 hrs ago).
- Cold · below 60°F · 384
- Cool · 60–69°F · 607
- Comfortable · 70–86°F · 930
- Warm · above 86°F · 215
- 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°F6.2 mi9 hrs ago
- Whippany River near Pine Brook NJUSGS gauge · New Jersey · 245 ft³/s72°F16 mi9 hrs ago
- Ramapo River at Pompton Lakes NJUSGS gauge · New Jersey · 391 ft³/s74°F16 mi8 hrs ago
- 74°F16 mi8 hrs ago
- Ramapo River above dam at Pompton Lakes NJUSGS gauge · New Jersey75°F16 mi8 hrs ago
- 73°F18 mi8 hrs ago
- Canoe Brook near Summit NJUSGS gauge · New Jersey · 18 ft³/s72°F20 mi8 hrs ago
- Pequest River at Pequest NJUSGS gauge · New Jersey · 235 ft³/s67°F23 mi9 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.
3.0 mi from your location
4.8(38)Indian Lake
This popular, 99-acre lake features 3 beaches with seasonal lifeguards, boating, fishing & swimming.
8.1 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.
13 mi from your location
4.7(378)Wallkill River National Wildlife Refuge
Wildlife habitat known for its diversity of birds with hunting, fishing, trails & learning programs.
15 mi from your location
4.5(24)Wanaque Reservoir
Constructed in 1928, this manmade lake is 6.6 miles in length & is surrounded by dense forests.
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.