Live · updated daily from USGS
Swimmable water near you
2,139 USGS sensors are reporting a live water temperature right now, the newest reading from August 22, 2026 (5 hrs ago).
- Cold · below 60°F · 384
- Cool · 60–69°F · 607
- Comfortable · 70–86°F · 933
- 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.
- Crosswicks Creek at Extonville NJUSGS gauge · New Jersey · 86 ft³/s74°F8.9 mi5 hrs ago
- Crosswicks Ck at Hockamik Rd near Cookstown NJUSGS gauge · New Jersey · 7 ft³/s73°F13 mi5 hrs ago
- Delaware and Raritan Canal at Port Mercer NJUSGS gauge · New Jersey · 133 ft³/s76°F14 mi5 hrs ago
- 76°F16 mi5 hrs ago
- Delaware River at Trenton NJUSGS gauge · New Jersey · 10,500 ft³/s76°F17 mi5 hrs ago
- Manasquan River near Allenwood NJUSGS gauge · New Jersey · 48 ft³/s70°F18 mi5 hrs ago
- Millstone River at Blackwells Mills NJUSGS gauge · New Jersey · 509 ft³/s77°F19 mi5 hrs ago
- Greenwood Branch at New Lisbon NJUSGS gauge · New Jersey · 25 ft³/s71°F20 mi5 hrs ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
4.4(136)Perrineville Lake Park
This large natural area features multi-use trails, wildlife viewing & a fishing pond.
1.3 mi from your location
Carnegie Lake
Sprawling reservoir in wooded surrounds, popular among rowers, anglers & ice skaters.
13 mi from your location
4.8(1,597)Manasquan Reservoir
Park with a multi-use trail around a reservoir, plus water recreation such as boating & fishing.
14 mi from your location
Lake Carasaljo
Prominent lake featuring multiuse trails, ice-skating, fishing, swimming & a place in urban legend.
15 mi from your location
4.5(11)Wreck Pond
Watershed preservation site & wildlife habitat with eco-tourism & volunteer activities.
23 mi from your location
4.5(399)Riverside Park
Riverside public green space with picnic tables, a pavilion, a boat launch & shade trees.
23 mi from your location
4.5(611)Fisherman's Cove Conservation Area
Sizable river beachfront park with fishing access, known for being leashed-dog-friendly.
23 mi from your location
4.7(266)Sea Girt Beach
White-sand beach with lifeguards & a historic lighthouse, plus a boardwalk with gazebos & benches.
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.

