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.
- Spruce Run Reservoir at Clinton NJUSGS gauge · New Jersey74°F10 mi1 day ago
- 81°F11 mi1 day ago
- Raritan River at Manville NJUSGS gauge · New Jersey · 2,240 ft³/s72°F11 mi1 day ago
- Millstone River at Blackwells Mills NJUSGS gauge · New Jersey · 902 ft³/s73°F16 mi1 day ago
- Pequest River at Pequest NJUSGS gauge · New Jersey · 448 ft³/s66°F17 mi1 day ago
- 78°F18 mi1 day ago
- Delaware River at Frenchtown NJUSGS gauge · New Jersey73°F20 mi1 day ago
- Canoe Brook near Summit NJUSGS gauge · New Jersey · 142 ft³/s69°F20 mi1 day ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.5(399)Riverside Park
Riverside public green space with picnic tables, a pavilion, a boat launch & shade trees.
15 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.
16 mi from your location
Indian Lake
This popular, 99-acre lake features 3 beaches with seasonal lifeguards, boating, fishing & swimming.
20 mi from your location
4.6(319)Lake Hopatcong
Bustling recreational lake for boating, water skiing & swimming, with waterfront eateries & bars.
20 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.
20 mi from your location
Carnegie Lake
Sprawling reservoir in wooded surrounds, popular among rowers, anglers & ice skaters.
23 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.

