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 21, 2026 (13 hrs ago).
- Cold · below 60°F · 375
- Cool · 60–69°F · 594
- 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.
- Delaware River at Frenchtown NJUSGS gauge · New Jersey73°F5.4 mi13 hrs ago
- Delaware River at Riegelsville NJUSGS gauge · New Jersey · 9,070 ft³/s73°F11 mi13 hrs ago
- Pohatcong Crk at Creek Rd nr Carpentersville NJUSGS gauge · New Jersey · 152 ft³/s66°F13 mi13 hrs ago
- 76°F16 mi14 hrs ago
- D&R Ca feeder US of gate at Washington Crossing NJUSGS gauge · New Jersey · 127 ft³/s76°F16 mi14 hrs ago
- Spruce Run Reservoir at Clinton NJUSGS gauge · New Jersey74°F16 mi13 hrs ago
- 81°F16 mi13 hrs ago
- Lehigh River at Glendon, PAUSGS gauge · Pennsylvania · 1,600 ft³/s71°F17 mi13 hrs ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.7(259)Lake Nockamixon
Set within a lush state park, this meandering lake is known for its sailing, kayaking & fishing.
7.1 mi from your location
4.5(201)Lake Towhee Park
Tranquil natural area offering picnicking, boating, fishing, hiking, a playground & a ball field.
9.6 mi from your location
Lake Galena
Reservoir with an 8-mi. perimeter, edged by park & hiking, biking & equestrian trails.
11 mi from your location
4.4(795)Riverside Park
Public recreation space along the Delaware River with a playground & a sheltered, open-air theater.
18 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.

