Haad Than Sadet sea temperature today: 31°C – beach water temperature, Haad Than Sadet, Thailand
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Thailand · Koh Phangan

Haad Than Sadet

Sea
87.4°F
Air
–
UV
–
Bathtub
Above 28°C

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Climate · monthly averages
Sea temperature by month
5-year averages (2021–2025). Min/Max are typical daily lows and highs, not record extremes.
75°F
79°F
82°F
86°F
90°F
93°F
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Min
81
82
84
86
86
86
85
85
85
84
83
82
Avg
82
83
84
87
87
86
86
86
85
85
84
82
Max
84
84
85
88
88
87
86
86
85
86
85
83

Warmest in May (87.4°F). Coldest in January (82.1°F). Comfortable for swimming year-round.

About Haad Than Sadet

Ko Pha-ngan sits in the Gulf of Thailand off Surat Thani, and its eastern jungle culminates in Than Sadet National Park, where boulders along the stream carry the royal initials Thai kings have carved since Rama V's 1888 visit. On the southern peninsula, Haad Rin draws thousands to its monthly Full Moon Party, while Haad Mae Haad on the northwest coast links to tiny Koh Ma by a tied-island sandbar at low tide. The sea stays at 28–29 °C year-round; Samui airport is a 30-minute ferry away.