White sandy beaches, emerald-colored sea. It truly felt like a tropical island, and I thoroughly enjoyed it. I can't believe there's such a wonderful place relatively close to Pattaya! Next time, I'd like to stay overnight and explore more parts of the island.
Anonymous User
Couple
Koh Samet Weather, Climate and Best Time to Visit
Data source:Meteostat Update date:2025-09
Koh Samet year round climate
Spring (March–May): Average 83–85°F, hot climate. March and April are relatively dry, while May sees more rainfall. Common activities: Swimming, sunbathing, snorkeling. Recommended clothing: Light and breathable clothing, swimwear, sun hat, sunglasses.
Summer (June–August): Average 84–85°F, hot and dry climate with abundant sunshine. Common activities: Swimming, water sports, exploring the island. Recommended clothing: Light and breathable clothing, swimwear, sun hat, sunglasses.
Autumn (September–November): Average 81–83°F. October has heavier rainfall, while other months are drier. Common activities: Swimming, diving, but be aware of potential rain in October. Recommended clothing: Light and breathable clothing, and rain gear for October.
Winter (December–February): Average 79–81°F, warm and comfortable climate, dry with little rain. Common activities: Swimming, snorkeling, enjoying the beach. Recommended clothing: Light clothing, a light jacket may be needed in the mornings and evenings.
Koh Samet climatological average
Annual average temperature: approx. 82.4°F / Annual rainfall: approx. 486 mm / Summer humidity: 60%–70% / Rainiest month: October
Koh Samet monthly average temperature and precipitation
Month
Air temperature (°F)
Precipitation (mm)
January
79.7°F
0
February
81.5°F
48.5
March
83.5°F
24.9
April
85.8°F
7.5
May
85.8°F
145.2
June
85.6°F
0
July
84°F
0
August
84.4°F
0
September
83.1°F
0
October
82°F
230
November
81.7°F
28.4
December
80.2°F
2
Koh Samet weather for the next seven days
5/6
Wednesday
Patchy rain nearby
88.1°F/83.8°F
5/7
Thursday
Patchy rain nearby
87.4°F/83.9°F
5/8
Friday
Moderate rain
87.8°F/83.6°F
5/9
Saturday
Moderate rain
86.5°F/81.7°F
5/10
Sunday
Patchy rain nearby
88.9°F/80.1°F
5/11
Monday
Patchy rain nearby
88°F/83.2°F
5/12
Tuesday
Patchy rain nearby
87°F/83.7°F
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