Temperature
Hot by day, warm at night.
92°Ftypical Aug high
Ko Samui
Thailand · Southeast Asia
Ko Samui is most comfortable around January to March, its relatively drier stretch in a hot, humid climate.
Best time to go
12 mo · Typical year
Temperature range
76°F to 93°F
Rain
17 days/mo
Sunshine
5.9 h/day
Humidity feel
Humid year-round
When to visit
Month-by-month fit
Precipitation
Rain most days.
58%wet-day frequency
AmountWet-day chance
Sunshine
Cloudier spells limit sunshine.
4.9 hAug sunshine
Heat & humidity by month
Hot days, with humid stretches.
Very humidAug heat feel
Air-feel chart data is unavailable for this destination. Use the selected-month dew point, temperature, rain, and sunshine context together rather than treating any one metric as total comfort.
Sea temperature
85°Aug sea temp
More detailIncludes sky and daypart comfort
Cloud cover
Mostly cloudy skies.
13%Aug clear sky
ClearCloud cover
Similar
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Want a side-by-side climate view? Compare Ko Samui with Nosara.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 28, 2026
Data & methodology