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Seasonal ranking

Warmest sea temperature in Thailand in September

Where the sea is warmest across Thailand during September, ranked by long-term monthly average water temperature. Patong Beach (Phuket, Thailand) tops the list at around 29°C. Open any spot for today's live water temperature and a 7-day swim forecast.

  1. 1
    Patong Beach
    Phuket · Thailand · Andaman Sea
    Warm — comfortable swimming
    29°C
    September average
  2. 2
    Kata Beach
    Phuket · Thailand · Andaman Sea
    Warm — comfortable swimming
    29°C
    September average
  3. 3
    Karon Beach
    Phuket · Thailand · Andaman Sea
    Warm — comfortable swimming
    29°C
    September average
  4. 4
    Surin Beach
    Phuket · Thailand · Andaman Sea
    Warm — comfortable swimming
    29°C
    September average
  5. 5
    Kamala Beach
    Phuket · Thailand · Andaman Sea
    Warm — comfortable swimming
    29°C
    September average
  6. 6
    Nai Harn Beach
    Phuket · Thailand · Andaman Sea
    Warm — comfortable swimming
    29°C
    September average
  7. 7
    Railay Beach
    Krabi · Thailand · Andaman Sea
    Warm — comfortable swimming
    29°C
    September average
  8. 8
    Maya Bay
    Krabi · Thailand · Andaman Sea
    Warm — comfortable swimming
    29°C
    September average
  9. 9
    Chaweng Beach
    Surat Thani · Thailand · Gulf of Thailand
    Warm — comfortable swimming
    29°C
    September average
  10. 10
    Haad Rin
    Surat Thani · Thailand · Gulf of Thailand
    Warm — comfortable swimming
    29°C
    September average
  11. 11
    Sairee Beach
    Surat Thani · Thailand · Gulf of Thailand
    Warm — comfortable swimming
    29°C
    September average
  12. 12
    Hua Hin Beach
    Prachuap Khiri Khan · Thailand · Gulf of Thailand
    Warm — comfortable swimming
    29°C
    September average
  13. 13
    Pattaya Beach
    Chonburi · Thailand · Gulf of Thailand
    Warm — comfortable swimming
    29°C
    September average
  14. 14
    Nai Harn Beach
    Phuket · Thailand · Andaman Sea
    Warm — comfortable swimming
    29°C
    September average
  15. 15
    Klong Dao Beach
    Krabi · Thailand · Andaman Sea
    Warm — comfortable swimming
    29°C
    September average
  16. 16
    Maya Bay
    Phi Phi Islands · Thailand · Andaman Sea
    Warm — comfortable swimming
    29°C
    September average
  17. 17
    Klong Dao Beach
    Ko Lanta · Thailand · Andaman Sea
    Warm — comfortable swimming
    29°C
    September average
  18. 18
    Charlie Beach
    Trang & Satun · Thailand · Andaman Sea
    Warm — comfortable swimming
    29°C
    September average
  19. 19
    Ko Kradan Beach
    Trang & Satun · Thailand · Andaman Sea
    Warm — comfortable swimming
    29°C
    September average
  20. 20
    Pattaya Beach Lipe
    Trang & Satun · Thailand · Andaman Sea
    Warm — comfortable swimming
    29°C
    September average
  21. 21
    Donald Duck Bay
    Ko Similan · Thailand · Andaman Sea
    Warm — comfortable swimming
    29°C
    September average
  22. 22
    Nang Thong Beach
    Khao Lak · Thailand · Andaman Sea
    Warm — comfortable swimming
    29°C
    September average
  23. 23
    Chaweng Beach
    Ko Samui · Thailand · Gulf of Thailand
    Warm — comfortable swimming
    29°C
    September average
  24. 24
    Haad Rin Beach
    Ko Pha-ngan · Thailand · Gulf of Thailand
    Warm — comfortable swimming
    29°C
    September average
  25. 25
    Sairee Beach
    Ko Tao · Thailand · Gulf of Thailand
    Warm — comfortable swimming
    29°C
    September average

Warmest sea in September elsewhere

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Thailand in September — frequently asked questions

Where is the sea warmest in Thailand in September?
Patong Beach in Thailand has the warmest sea in Thailand in September, averaging about 29.0 °C. Kata Beach (29.0 °C) and Karon Beach follow close behind.
How many beaches in Thailand are warm enough to swim in September?
25 of the top 25 ranked beaches in Thailand 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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