Best time to visit the Gulf of Thailand islands

The best time to visit the Gulf of Thailand islands is January to March, judged across 3 places; November is its weakest month.

in seasongoodnot its bestlow season

Updated September 2026 · Southeast Asia · 3 places, each judged for what it is · climate normals from ERA5 reanalysis

The Gulf of Thailand islands month by month

MonthSeasonWhyBest places
Januaryin seasondry season · 28°C highs · 10 h sunKo Pha Ngan, Ko Samui, Ko Tao
Februaryin seasondry season · 28°C highs · 11 h sunKo Pha Ngan, Ko Tao, Ko Samui
Marchin seasondry season · 29°C highs · 11 h sunKo Tao, Ko Pha Ngan, Ko Samui
Aprilgooddry season · 30°C highs · 11 h sunKo Tao, Ko Pha Ngan, Ko Samui
Maygooddry season · 31°C highs · 10 h sunKo Samui, Ko Tao, Ko Pha Ngan
Junegooddry season · 31°C highs · 10 h sunKo Samui, Ko Pha Ngan, Ko Tao
Julygooddry season · 31°C highsKo Samui, Ko Pha Ngan, Ko Tao
Augustgooddry season · 31°C highs · 10 h sunKo Samui, Ko Pha Ngan, Ko Tao
Septembergood30°C highsKo Samui, Ko Pha Ngan, Ko Tao
Octobernot its bestmonsoon · best Jan–MarKo Tao, Ko Samui, Ko Pha Ngan
Novembernot its bestmonsoon · best Jan–MarKo Pha Ngan, Ko Tao, Ko Samui
Decembergood28°C highs · 9 h sunKo Pha Ngan, Ko Tao, Ko Samui

In season: one of the region's three best months, and good in its own right. Low season: one of its three worst, and well below its best. The reasons compare each month with the region's own year and name the seasons on the ground — monsoon, autumn colour, hurricanes — where most of its places share them.

All 3 places in the Gulf of Thailand islands

The Gulf of Thailand islands — FAQ

When is the best time to visit the Gulf of Thailand islands?
January to March. In March: dry season · 29°C highs · 11 h sun.
When is the low season in the Gulf of Thailand islands?
The Gulf of Thailand islands has no month that falls far below the rest of its year; November is the weakest (monsoon · best Jan–Mar).
Which months are in season in the Gulf of Thailand islands?
January to March — the months among its best that are also good in their own right.