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Warmest sea temperature in United States in September

Where the sea is warmest across United States during September, ranked by long-term monthly average water temperature. Bahia Honda (Florida Keys, United States) tops the list at around 30°C. Open any spot for today's live water temperature and a 7-day swim forecast.

  1. 1
    Bahia Honda
    Florida Keys · United States · Atlantic Ocean
    Warm — comfortable swimming
    30°C
    September average
  2. 2
    Sombrero Beach
    Florida Keys · United States · Atlantic Ocean
    Warm — comfortable swimming
    30°C
    September average
  3. 3
    Smathers Beach
    Florida Keys · United States · Atlantic Ocean
    Warm — comfortable swimming
    30°C
    September average
  4. 4
    South Beach
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  5. 5
    Bal Harbour Beach
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  6. 6
    Sunny Isles Beach
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  7. 7
    Hollywood Beach
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  8. 8
    Hallandale Beach
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  9. 9
    Fort Lauderdale Beach
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  10. 10
    Deerfield Beach
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  11. 11
    Boca Raton Beach
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  12. 12
    Delray Municipal Beach
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  13. 13
    Lake Worth Beach
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  14. 14
    Palm Beach Municipal
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  15. 15
    Singer Island
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  16. 16
    Juno Beach
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  17. 17
    Jupiter Beach
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  18. 18
    Stuart Beach
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  19. 19
    Jensen Beach
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  20. 20
    Vero Beach
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  21. 21
    Cocoa Beach
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  22. 22
    Cape Canaveral Beach
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  23. 23
    Daytona Beach
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  24. 24
    Ormond Beach
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average
  25. 25
    New Smyrna Beach
    Florida Atlantic · United States · Atlantic Ocean
    Warm — comfortable swimming
    29°C
    September average

Warmest sea in September elsewhere

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United States in September — frequently asked questions

Where is the sea warmest in United States in September?
Bahia Honda in United States has the warmest sea in United States in September, averaging about 30.0 °C. Sombrero Beach (30.0 °C) and Smathers Beach follow close behind.
How many beaches in United States are warm enough to swim in September?
25 of the top 25 ranked beaches in United States average 22 °C or more in September, which most swimmers find comfortable without a wetsuit.
How are these September sea temperatures calculated?
Each figure is a long-term monthly average sea surface temperature for that location, so it reflects a typical September rather than today's reading. Open a beach page for the live water temperature and 7-day forecast.

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