Ko Samui: May Weather


Ko Samui Weather in May

May is a good month to visit Ko Samui, especially if you enjoy very hot weather.

You can expect very hot, sunny days interspersed with the occasional and brief late afternoon tropical downpour. Daytime temperatures average 29°C (84°F).

Weather conditions in May are great for swimming, snorkelling, scuba diving and kayaking. It’s also a good time to explore Ko Samui on foot or by elephant.


Ko Samui Weather Averages in May 

Average Temperature (°C)  Temperature icon  29°C (84°F)
Average High Temperature (°C)  Temperature icon  33°C (91°F)
Average Low Temperature (°C)  temperature icon  26°C (79°F)
Hours of Sunshine (Daily)  sun icon  6 hours per day
Hours of Daylight (Daily)  13  13 hours per day
Comfort Level  Very high heat & humidity icon  Very high heat & 80% humidity
UV Index  11  Extreme
Days with some Rainfall  umbrella icon  9 days
Average Monthly Rainfall (mm)  rain cloud  160mm
Sea Temperature (°C)  swimming icon  30°C (86°F)
Weather averages for Ko Samui, Thailand

Best time to visit Ko Samui

The best time to visit Ko Samui is during the dry season from late-December to April, with February to April usually the driest months averaging 28°C (82°F). Ko Samui is a year-round destination.

Ko Samui Annual Weather


Ko Samui Monthly Weather Review

January February March April May June
July August September October November December
Latest update on this honeymoon destination: 11 June, 2020
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