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The Water Around Us
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Live · updated daily from USGS

Swimmable water near you

1,325 USGS sensors are reporting a live water temperature right now, the newest reading from August 23, 2026 (1 hr ago).

Clear location
  • Cold · below 60°F · 218
  • Cool · 60–69°F · 484
  • Comfortable · 70–86°F · 545
  • 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.

  1. West Grand Lake at Grand Lake Stream, MaineUSGS gauge · Maine
    73°F90 mi2 hrs ago
  2. Lewy Lake at Princeton, MaineUSGS gauge · Maine
    74°F98 mi1 hr ago
  3. St. Croix River at Milltown, MaineUSGS gauge · Maine
    73°F103 mi2 hrs ago
  4. Wild River at Gilead, MaineUSGS gauge · Maine · 23 ft³/s
    67°F118 mi1 hr ago
  5. ISINGLASS R AT ROCHESTER NECK RD, NR DOVER, NHUSGS gauge · New Hampshire · 3 ft³/s
    65°F128 mi2 hrs ago
  6. SACO RIVER AT RIVER STREET, AT BARTLETT, NHUSGS gauge · New Hampshire · 52 ft³/s
    62°F131 mi1 hr ago
  7. MERRIMACK R ESTUARY US OF SHAD CRK, SALISBURY, MAUSGS gauge · Massachusetts
    68°F138 mi2 hrs ago
  8. LAMPREY RIVER AT LANGFORD ROAD, AT RAYMOND, NHUSGS gauge · New Hampshire · 4 ft³/s
    69°F145 mi1 hr ago

Nearest swimmable spots

Rated, photographed water destinations within 25 miles — pair one with the nearest sensor reading above before you go.

No rated, photographed swim spots within 25 miles of this point yet. The nearest sensor readings above still tell you what the water is doing — or search any river, lake or beach by name.
Search a spot →

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.