Is May a good month to visit Koh Samui?

May sits in the wet season period, so trip quality depends on your preferred weather, crowd levels, and pace.

What should I pack for Koh Samui in May?

Average highs around 28.7C and lows near 24C. Pack quick-dry clothing and a light waterproof layer for May.

What weather should I expect in Koh Samui during May?

May typically averages around 26.4C, with about 134.3mm of rain across 21 days.

Koh Samui, Thailand

Koh Samui in May

Koh Samui, Thailand

Visiting Koh Samui in May means experiencing the wet season. As a tropical destination, expect warm temperatures year-round with higher rainfall and humidity.

SeasonWet season

Travel StyleNature's Wonder

Cost$$

Weather in Koh Samui in May

Average highs around 28.7C and lows near 24C. 134.3mm average precipitation and about 21 rainy days. May typically sits between April and June conditions, so it is useful for travelers wanting a balanced window in Koh Samui. Pack quick-dry clothing and a light waterproof layer for May.

Avg High28.7C

Avg Low24C

Rainy Days21

Precipitation134.3mm

Daylight12.6h/day

Sunshine10h/day

Wind14.8 km/h

UVmoderate

Humidityhumid

Temperature

May brings wet season conditions in Koh Samui, Thailand. The average temperature is about 26.4C, with lows near 24C and highs around 28.7C.

Sunshine Hours

Koh Samui, Thailand usually gets around 10 hours of sunshine per day in May, with roughly 12.6 daylight hours available for sightseeing.

Rain

May sees around 134.3mm of rainfall over about 21 days. Rain can occur for around 8.1 hours per day on average.

Humidity

Humidity in May is generally humid for Koh Samui, Thailand, especially when rainfall periods increase.

Koh Samui in May

Koh Samui in May