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 22, 2026 (12 hrs ago).
- Cold · below 60°F · 384
- Cool · 60–69°F · 607
- Comfortable · 70–86°F · 929
- 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.
- LAMPREY RIVER AT LANGFORD ROAD, AT RAYMOND, NHUSGS gauge · New Hampshire · 7 ft³/s71°F7.3 mi1 day ago
- ISINGLASS R AT ROCHESTER NECK RD, NR DOVER, NHUSGS gauge · New Hampshire · 4 ft³/s64°F12 mi1 day ago
- SOUTH BRANCH PISCATAQUOG RIVER NEAR GOFFSTOWN, NHUSGS gauge · New Hampshire · 15 ft³/s68°F26 mi1 day ago
- 63°F27 mi1 day ago
- SOUHEGAN RIVER (SITE WLR-1) NEAR MILFORD, NHUSGS gauge · New Hampshire · 33 ft³/s69°F35 mi1 day ago
- 62°F44 mi1 day ago
- 63°F49 mi1 day ago
- CAMBRIDGE RES., UNNAMED TRIB 2, NR LEXINGTON, MAUSGS gauge · Massachusetts · 0 ft³/s65°F49 mi1 day ago
Nearest swimmable spots
Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.
Pawtuckaway Lake
Celebrated, 784-acre lake featuring swimming, boating, canoe rentals, mountain biking & picnicking.
4.1 mi from your location
4.7(198)Massabesic Lake
Sizable lake & public water supply in a scenic setting with walking trails, fishing & boating.
15 mi from your location
3.6(26)Country Pond
Trees encircle this large, scenic pond in a serene environment that draws boaters & fishermen.
18 mi from your location
4.8(14)Island Pond
A 532-acre pond with an island known for fishing, birdwatching, boating, water skiing & hiking.
19 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.

