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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 21, 2026 (23 hrs ago).

Clear location
  • Cold · below 60°F · 375
  • Cool · 60–69°F · 594
  • Comfortable · 70–86°F · 938
  • Warm · above 86°F · 228
  • 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. PECONIC RIVER AT COUNTY HWY 105 AT RIVERHEAD NYUSGS gauge · New York
    81°F9.5 mi23 hrs ago
  2. FLAX POND AT OLD FIELD NYUSGS gauge · New York
    73°F17 mi1 day ago
  3. NISSEQUOGUE RIVER AT LANDING AVE AT SMITHTOWN, NYUSGS gauge · New York
    66°F20 mi1 day ago
  4. CONNETQUOT RIVER DISTRIBUTARY NEAR OAKDALE NYUSGS gauge · New York
    65°F20 mi23 hrs ago
  5. HOUSATONIC RIVER NR NELLS ISLAND NR STRATFORD, CTUSGS gauge · Connecticut
    75°F25 mi1 day ago
  6. SHELTER ISLAND SOUND AT SHELTER ISLAND NYUSGS gauge · New York
    77°F28 mi1 day ago
  7. SAMPAWAMS CREEK AT BABYLON NYUSGS gauge · New York · 35 ft³/s
    68°F29 mi1 day ago
  8. CARLLS RIVER AT BABYLON NYUSGS gauge · New York · 114 ft³/s
    70°F30 mi1 day ago

Nearest swimmable spots

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

Cupsogue Beach County Park4.7(1,300)

Cupsogue Beach County Park

Park · Westhampton Beach, New York

Beachfront park featuring lifeguard-supervised swimming, bass fishing, camping & a concession stand.

9.9 mi from your location

Short Beach Park4.6(857)

Short Beach Park

Park · Stratford, Connecticut

Waterfront park & beach offering play & picnic areas as well as tennis courts & a par-3 golf course.

24 mi from your location

Silver Sands Beach4.1(35)

Silver Sands Beach

Beach · East Haven, Connecticut

Compact sandy stretch on the Long Island Sound flanked by private residences, town beaches & a park.

24 mi from your location

Lighthouse Point Park4.5(3,491)

Lighthouse Point Park

City park · New Haven, Connecticut

An 1847 lighthouse anchors this beachfront that is popular with swimmers & a prime birding spot.

24 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.