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 (7 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.
- SOUTH BRANCH PISCATAQUOG RIVER NEAR GOFFSTOWN, NHUSGS gauge · New Hampshire · 15 ft³/s67°F10.0 mi7 hrs ago
- LAMPREY RIVER AT LANGFORD ROAD, AT RAYMOND, NHUSGS gauge · New Hampshire · 4 ft³/s69°F13 mi7 hrs ago
- SOUHEGAN RIVER (SITE WLR-1) NEAR MILFORD, NHUSGS gauge · New Hampshire · 24 ft³/s67°F19 mi7 hrs ago
- ISINGLASS R AT ROCHESTER NECK RD, NR DOVER, NHUSGS gauge · New Hampshire · 3 ft³/s65°F28 mi8 hrs ago
- 68°F35 mi8 hrs ago
- ASHUELOT RIVER NEAR GILSUM, NHUSGS gauge · New Hampshire · 11 ft³/s66°F41 mi7 hrs ago
- 64°F43 mi7 hrs ago
- CAMBRIDGE RES., UNNAMED TRIB 2, NR LEXINGTON, MAUSGS gauge · Massachusetts · 0 ft³/s64°F44 mi7 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(198)Massabesic Lake
Sizable lake & public water supply in a scenic setting with walking trails, fishing & boating.
4.8 mi from your location
Pawtuckaway Lake
Celebrated, 784-acre lake featuring swimming, boating, canoe rentals, mountain biking & picnicking.
15 mi from your location
4.8(14)Island Pond
A 532-acre pond with an island known for fishing, birdwatching, boating, water skiing & hiking.
17 mi from your location
4.7(29)Weare Reservoir
Reservoir on the Piscataquog River with fishing & a public park with a beach & a boat ramp.
17 mi from your location
4.7(121)Canobie Lake
Calm reservoir with an amusement park along its shores, also popular for kayaking & fishing.
20 mi from your location
4.7(2,266)Mine Falls Park
Vast, natural riverfront oasis featuring forest trails, sports fields & outdoor activities.
20 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.

