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Things to Do in Koh Samui in September
Real historical weather for Koh Samui in September: average highs of 28°C and lows of 23°C, with around 128mm of rain (averaged over the last 3 years). Koh Samui is in Thailand.
28°C
Average high
23°C
Average low
128mm
Typical rainfall
Real things to do in Koh Samui in September
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Half Day Highlights Koh Samui Tour
★ 4.9(1,540 reviews)· 5 hrs
From €26
Private Koh Samui Airport Transfer with Meet & Greet
★ 4.8(27 reviews)· 30 min
From €15
2-Hour Koh Samui ATV Quad Tour
★ 4.8(692 reviews)· 2 hrs
From €49
Koh Samui Private Airport Transfer
★ 4.7(107 reviews)
From €13
Private Customized Tour with Driver in Koh Samui
★ 4.7(284 reviews)· 8 hrs
From €32
Koh Samui Sightseeing Tour Around The Island
★ 4.7(121 reviews)· 5 hrs
From €23
Koh Samui Sightseeing Tour by Minivan
★ 4.6(199 reviews)· 5 hrs
From €21
Koh Tao & Koh Nang Yuan Snorkeling Tour by Speed Boat from Samui
★ 4.6(131 reviews)· 9 hrs
From €56
Koh Samui to Koh Phangan by Seatran Discovery Ferry
★ 4.4(14 reviews)· 45 min
From €12
Snorkeling Tour Koh Tao & Koh Nang Yuan from Samui by Speedboat
★ 4.3(356 reviews)· 9 hrs
From €51
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FAQs — Koh Samui in September
Based on real historical data (averaged over the last 3 years), expect highs around 28°C and lows around 23°C, with roughly 128mm of rain.