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The warmest water in every state

Each state’s warmest current reading from USGS real-time water sensors — rivers, lakes, and reservoirs across the country.

Updated August 21, 2026 · 2,140 sensors reporting

  1. #1 · FloridaGULF OF AMERICA NEAR CRYSTAL RIVER FLWarmest of 122 sensors96°Fas of 9 hrs ago
  2. #2 · CaliforniaHOT C A FLUME NR MAMMOTH LAKES CAWarmest of 106 sensors94°Fas of 9 hrs ago
  3. #3 · South CarolinaWANDO RIVER AT CAINHOY BELOW WANDO, SCWarmest of 68 sensors92°Fas of 9 hrs ago
  4. #4 · TexasTrinity Rv at Liberty, TXWarmest of 69 sensors92°Fas of 9 hrs ago
  5. #5 · ArkansasRed River at Index, ARWarmest of 30 sensors92°Fas of 9 hrs ago
  6. #6 · LouisianaCompany Canal at Salt Barrier near Lockport, LAWarmest of 30 sensors91°Fas of 9 hrs ago
  7. #7 · AlabamaTOMBIGBEE RIVER NEAR NANAFALIA, AL.Warmest of 27 sensors91°Fas of 9 hrs ago
  8. #8 · NevadaBIG WARM SPGS NR DUCKWATER, NVWarmest of 13 sensors90°Fas of 8 hrs ago
  9. #9 · MississippiPEARL RIVER AT ROCKPORT, MSWarmest of 7 sensors90°Fas of 9 hrs ago
  10. #10 · GeorgiaHUDSON CREEK AT MERIDIAN LANDING, NEAR MERIDIAN,GAWarmest of 98 sensors89°Fas of 9 hrs ago
  11. #11 · North CarolinaFALLS LAKE ABOVE DAM NR FALLS, NCWarmest of 33 sensors88°Fas of 9 hrs ago
  12. #12 · ArizonaYUMA MESA OUTLET DRAIN NEAR YUMA, AZWarmest of 17 sensors88°Fas of 9 hrs ago
  13. #13 · KansasELK R NR ELK CITY, KSWarmest of 26 sensors86°Fas of 9 hrs ago
  14. #14 · MissouriOsage River at Taberville, MOWarmest of 20 sensors86°Fas of 8 hrs ago
  15. #15 · OklahomaIllinois River near Watts, OKWarmest of 17 sensors86°Fas of 9 hrs ago
  16. #16 · IllinoisCHICAGO SANITARY AND SHIP CANAL AT ROMEOVILLE, ILWarmest of 28 sensors84°Fas of 9 hrs ago
  17. #17 · VirginiaJAMES RIVER AT CARTERSVILLE, VAWarmest of 58 sensors84°Fas of 9 hrs ago
  18. #18 · KentuckyGREEN RIVER AT LOCK 1 AT SPOTTSVILLE, KYWarmest of 66 sensors83°Fas of 9 hrs ago
  19. #19 · New JerseyAbsecon Creek at Absecon NJWarmest of 55 sensors83°Fas of 9 hrs ago
  20. #20 · DelawareC AND D CANAL NR DELAWARE CITY, DEWarmest of 22 sensors83°Fas of 9 hrs ago
  21. #21 · TennesseeBUFFALO RIVER NEAR FLAT WOODS, TNWarmest of 20 sensors82°Fas of 9 hrs ago
  22. #22 · New MexicoBLACK RIVER AT HARKEY CROSSING NR MALAGA, NMWarmest of 14 sensors82°Fas of 8 hrs ago
  23. #23 · IndianaPATOKA RIVER NEAR CUZCO, INWarmest of 42 sensors82°Fas of 8 hrs ago
  24. #24 · UtahCOLORADO RIVER AT GYPSUM CANYON NEAR HITE, UTWarmest of 25 sensors81°Fas of 8 hrs ago
  25. #25 · MarylandPOTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STAWarmest of 19 sensors81°Fas of 8 hrs ago
  26. #26 · PennsylvaniaDelaware River at Fort Mifflin at Philadelphia, PAWarmest of 135 sensors81°Fas of 9 hrs ago
  27. #27 · New YorkPECONIC RIVER AT COUNTY HWY 105 AT RIVERHEAD NYWarmest of 74 sensors81°Fas of 8 hrs ago
  28. #28 · IowaBeaver Slough at 3rd Street at Clinton, IAWarmest of 13 sensors80°Fas of 9 hrs ago
  29. #29 · NebraskaPlatte River near Leshara, Nebr.Warmest of 11 sensors79°Fas of 9 hrs ago
  30. #30 · OhioIndian Lake at Russells Point OHWarmest of 57 sensors79°Fas of 9 hrs ago
  31. #31 · WyomingTantalus Creek at Norris Junction, YNPWarmest of 27 sensors79°Fas of 8 hrs ago
  32. #32 · ConnecticutCONNECTICUT RIVER AT ESSEX, CTWarmest of 12 sensors78°Fas of 9 hrs ago
  33. #33 · MassachusettsFRESH POND BUOY, NEAR INTAKE AT CAMBRIDGE, MAWarmest of 25 sensors78°Fas of 9 hrs ago
  34. #34 · MichiganSAGINAW RIVER AT HOLLAND AVENUE AT SAGINAW, MIWarmest of 51 sensors78°Fas of 9 hrs ago
  35. #35 · WashingtonYAKIMA RIVER AT VAN GIESEN BR NEAR RICHLAND, WAWarmest of 75 sensors78°Fas of 9 hrs ago
  36. #36 · WisconsinFOX RIVER AT OIL TANK DEPOT AT GREEN BAY, WIWarmest of 38 sensors77°Fas of 9 hrs ago
  37. #37 · OregonJOHN DAY RIVER AT MCDONALD FERRY, ORWarmest of 217 sensors77°Fas of 9 hrs ago
  38. #38 · North DakotaRED RIVER OF THE NORTH AT FARGO, NDWarmest of 16 sensors77°Fas of 9 hrs ago
  39. #39 · Rhode IslandWICKFORD TIDE GAGE NORTH KINGSTOWN, RIWarmest of 14 sensors77°Fas of 9 hrs ago
  40. #40 · West VirginiaCACAPON RIVER NEAR GREAT CACAPON, WVWarmest of 34 sensors76°Fas of 9 hrs ago
  41. #41 · ColoradoARKANSAS RIVER BELOW JOHN MARTIN RESERVOIR, CO.Warmest of 113 sensors76°Fas of 9 hrs ago
  42. #42 · IdahoSNAKE RIVER AT WEISER IDWarmest of 23 sensors75°Fas of 9 hrs ago
  43. #43 · MaineSt. Croix River at Milltown, MaineWarmest of 7 sensors75°Fas of 8 hrs ago
  44. #44 · MinnesotaST. CROIX RIVER AT STILLWATER, MNWarmest of 18 sensors75°Fas of 9 hrs ago
  45. #45 · MontanaMilk River at Nashua MTWarmest of 76 sensors74°Fas of 9 hrs ago
  46. #46 · South DakotaCHEYENNE RIVER AT RED SHIRT, SD1 sensor reporting74°Fas of 8 hrs ago
  47. #47 · VermontLAKE CHAMPLAIN AT BURLINGTON, VTWarmest of 3 sensors72°Fas of 9 hrs ago
  48. #48 · New HampshireLAMPREY RIVER AT LANGFORD ROAD, AT RAYMOND, NHWarmest of 9 sensors71°Fas of 8 hrs ago
  49. #49 · HawaiiKahakuloa Stream near Honokohau, Maui, HI1 sensor reporting71°Fas of 9 hrs ago
  50. #50 · AlaskaLEASK CREEK AT SHELTER COVE NR KETCHIKAN AKWarmest of 58 sensors64°Fas of 9 hrs ago

About this data

Every number on this page is a live reading from a USGS real-time monitoring station, captured in a daily snapshot. A state’s figure is the warmest sensor reading in that state right now — not a claim about its warmest lake or beach. Sensor coverage varies widely by state, most gauges sit on rivers and streams rather than swim beaches, and readings are provisional and can be revised by the USGS.

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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.