Live · updated daily from USGS
Swimmable water near you
1,324 USGS sensors are reporting a live water temperature right now, the newest reading from August 23, 2026 (9 hrs ago).
- Cold · below 60°F · 218
- Cool · 60–69°F · 484
- Comfortable · 70–86°F · 544
- Warm · above 86°F · 78
- 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.
- Perkiomen Creek at Graterford, PAUSGS gauge · Pennsylvania · 109 ft³/s73°F8.6 mi9 hrs ago
- Stony Creek at Sterigere Street at Norristown, PAUSGS gauge · Pennsylvania · 120 ft³/s70°F16 mi9 hrs ago
- Little Lehigh Creek near Trexlertown, PAUSGS gauge · Pennsylvania · 3 ft³/s69°F16 mi10 hrs ago
- Spring Creek at Trexlertown, PAUSGS gauge · Pennsylvania · 6 ft³/s60°F16 mi10 hrs ago
- Schuylkill River at Norristown, PAUSGS gauge · Pennsylvania · 1,710 ft³/s75°F16 mi10 hrs ago
- Little Lehigh Creek near Allentown, PAUSGS gauge · Pennsylvania · 83 ft³/s62°F17 mi10 hrs ago
- French Creek near Phoenixville, PAUSGS gauge · Pennsylvania · 36 ft³/s69°F17 mi10 hrs ago
- Cedar Creek at Mouth near Allentown, PAUSGS gauge · Pennsylvania · 75 ft³/s66°F17 mi10 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(560)Green Lane Reservoir
Located on a reservoir, this area offers non-motorized & electric-powered boat use & hiking trails.
5.2 mi from your location
Lake Galena
Reservoir with an 8-mi. perimeter, edged by park & hiking, biking & equestrian trails.
11 mi from your location
4.5(201)Lake Towhee Park
Tranquil natural area offering picnicking, boating, fishing, hiking, a playground & a ball field.
12 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.

