Best time to visit Koh Samui

• “The best time to visit Koh Samui is February to April” discoverkosamui.com
• “The best time to visit Koh Samui is January to April, with sunny, calm days.” oh-hoo.com
• “between late february and early june” tripoto.com

6 of the 7 travel guides we read name these months.

1. Best timeJanuary84°F / 76°F · 9 rainy daysChecking fares…January is dry and pleasant, with temperatures around 26°C and a calm sea.Christmas and New Year crowds thin out in January.
2. Best timeFebruary85°F / 77°F · 4 rainy daysChecking fares…February is statistically the driest month, with water visibility at its annual peak.Popular beaches see higher visitor numbers in February.
3. Best timeMarch87°F / 78°F · 5 rainy daysChecking fares…March stays dry and bright with temperatures rising into the low 30s.The Gulf side stays dry through the end of March, a classic Samui season.
4. Best timeApril89°F / 79°F · 6 rainy daysChecking fares…April is the hottest month, with highs near 34°C, and Songkran falls in mid-April.Songkran (13 to 15 April) is the one busy week; the surrounding weeks are calm.Songkran can bring crowds, traffic jams and delays as locals travel home.
5. May91°F / 78°F · 11 rainy daysChecking fares…May starts the shoulder season, with short afternoon showers every few days.
6. June91°F / 78°F · 10 rainy daysChecking fares…June has pleasant weather with light showers that usually clear within an hour.Late April to June is described as quiet, with most days sunny and a quick afternoon shower.
7. July90°F / 77°F · 11 rainy daysChecking fares…July and August are largely sunny on Samui while Phuket is in its rains.July is school holiday season and a peak time for families.
8. August90°F / 77°F · 11 rainy daysChecking fares…August is described as drier than April to June, an unofficial second dry season.A smaller high-season peak runs in July and August.
9. September89°F / 77°F · 11 rainy daysChecking fares…September shifts toward the green season, with showers more frequent late in the month.Mid-September to early October is quiet with mostly sunny mornings and afternoon rain.
10. October87°F / 76°F · 16 rainy daysChecking fares…October and November bring the heaviest rain, and seas start to roughen.Rain significantly reduces underwater visibility for snorkelling in the wet season.
11. November86°F / 75°F · 17 rainy daysChecking fares…November is the wettest and stormiest month, and ferries may be cancelled.
12. December85°F / 75°F · 12 rainy daysChecking fares…December improves week by week and is often mostly sunny by Christmas.Christmas and New Year book out the whole island, often 6 to 12 months ahead.The dry season overlaps with Christmas and New Year, making it the most popular time.

Weather: Ko Samui averages (1991 to 2020 averages), as listed in its climate table on Wikipedia.

What are the seasons in Koh Samui?

One source describes four seasons: dry December to February, hot March to May, rainy June to September, monsoon October to November.

Which month to avoid Koh Samui?

November is the wettest and stormiest month, with rough seas and occasional ferry cancellations.

• Best Beaches in Koh Samui7 places

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