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Live · updated daily from USGS

Swimmable water near you

2,137 USGS sensors are reporting a live water temperature right now, the newest reading from August 21, 2026 (11 hrs ago).

Clear location
  • Cold · below 60°F · 375
  • Cool · 60–69°F · 595
  • Comfortable · 70–86°F · 938
  • Warm · above 86°F · 229
  • 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. SAUGATUCK RIVER US RTE 136 NEAR SAUGATUCK, CTUSGS gauge · Connecticut
    75°F25 mi12 hrs ago
  2. HOUSATONIC RIVER NR NELLS ISLAND NR STRATFORD, CTUSGS gauge · Connecticut
    75°F26 mi12 hrs ago
  3. NORWALK R AT MARITIME AQUARIUM NR S NORWALK, CTUSGS gauge · Connecticut
    70°F26 mi12 hrs ago
  4. NORWALK HARBOR AT THE COVE MARINA NR E NORWALK, CTUSGS gauge · Connecticut
    75°F27 mi12 hrs ago
  5. FLAX POND AT OLD FIELD NYUSGS gauge · New York
    73°F39 mi12 hrs ago
  6. WEST BRANCH FARMINGTON RIVER AT RIVERTON, CTUSGS gauge · Connecticut · 177 ft³/s
    50°F40 mi12 hrs ago
  7. WEST HARBOR AT OYSTER BAY NWR AT BAYVILLE NYUSGS gauge · New York
    76°F40 mi12 hrs ago
  8. FROST CREEK AT SHEEP LN BRIDGE AT LATTINGTOWN NYUSGS gauge · New York
    74°F41 mi11 hrs ago

Nearest swimmable spots

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

East Branch Reservoir4.7(27)

East Branch Reservoir

Lake · Southeast, New York

525-acre, tree-ringed water reservoir with miles of hiking trails on the western edge.

9.7 mi from your location

Wonder Lake State Park4.5(142)

Wonder Lake State Park

State park · Holmes, New York

Rugged, scenic park with lakes & ponds features 9 miles of trails for hiking & horseback riding.

12 mi from your location

Croton Falls Reservoir4.7(30)

Croton Falls Reservoir

Lake · Carmel, New York

Artificial lake, part of NYC's water supply, with boating, marinas & fishing for brown trout.

14 mi from your location

Mianus River Gorge Preserve4.7(129)

Mianus River Gorge Preserve

Nature preserve · Bedford, New York

Large, old-growth forest nature preserve with miles of hiking trails, open Apr–Nov.

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.