SeasonMapKo Chang vs Ko Samui: which is better, month by month
Ko Samui beats Ko Chang in 7 of 12 months — its lead peaks in July (78 vs 52) — while Ko Chang wins November to January; they are within 3 points in February and April.
Each place is scored under the lens that suits its type. Comfort is SeasonMap's 0–100 estimate from ERA5 climate normals, not a forecast.
Ko Chang vs Ko Samui — all 12 months
| Month | Ko Chang | Ko Samui | Winner | Gap |
|---|---|---|---|---|
| January | 90Ssweltering, a little rain, clean air | 84Ahot, rainy, muggy air | Ko Chang | 6 |
| February | 88Asweltering, a little rain | 88Asweltering, a little rain, muggy air | Tie | 0 |
| March | 83Asweltering, rainy, muggy air | 90Ssweltering, a little rain, muggy air | Ko Samui | 7 |
| April | 77Bsweltering, rainy, muggy air | 80Asweltering, rainy, clean air | Tie | 3 |
| May | 61Csweltering, soaked, clean air | 77Bsweltering, rainy, clean air | Ko Samui | 16 |
| June | 58Dsweltering, soaked, clean air | 83Asweltering, a little rain, clean air | Ko Samui | 25 |
| July | 52Dsweltering, soaked, clean air | 78Bsweltering, rainy, clean air | Ko Samui | 26 |
| August | 56Dsweltering, soaked, clean air | 82Asweltering, a little rain, clean air | Ko Samui | 26 |
| September | 49Fsweltering, soaked, clean air | 73Bsweltering, rainy, clean air | Ko Samui | 24 |
| October | 55Dsweltering, soaked, clean air | 62Csweltering, soaked, clean air | Ko Samui | 7 |
| November | 80Asweltering, rainy, clean air | 59Dsweltering, soaked, clean air | Ko Chang | 21 |
| December | 92Ssweltering, dry, clean air | 70Bhot, soaked, muggy air | Ko Chang | 22 |
A month is a tie when the two are within 3 points. The widest gap is July (52 vs 78). Tap a month for that month's temperature, rain, humidity and air quality side by side.