Weather in Koh Samui in May
Koh Samui offers excellent beach weather with frequent rainfall (avg 28.6°C, 19 rainy days). Weather score: 7.3/10 · Very good
Avg temp
28.6°C
Daytime high
30.7°C
Night low
26.8°C
Rainy days
19
Sun per day
10.7 h
Sea temp
31.6°C
Koh Samui climate table – all 12 months
| Month | Avg temp | High | Low | Rainy days | Sun/day | Score |
|---|---|---|---|---|---|---|
| January | 26°C | 27.6°C | 24.6°C | 15 | 10.3 h | 6.7/10 |
| February | 26.4°C | 28.2°C | 24.8°C | 10 | 10.7 h | 8.6/10 |
| March | 27.4°C | 29.6°C | 25.6°C | 9 | 11 h | 8.6/10 |
| April | 28.4°C | 30.5°C | 26.6°C | 14 | 10.9 h | 7.8/10 |
| May | 28.6°C | 30.7°C | 26.8°C | 19 | 10.7 h | 7.3/10 |
| June | 28.4°C | 30.7°C | 26.6°C | 15 | 10 h | 7.8/10 |
| July | 28.1°C | 30.5°C | 26.3°C | 16 | 9.6 h | 7.8/10 |
| August | 28°C | 30.5°C | 26.2°C | 16 | 9.7 h | 7.8/10 |
| September | 27.3°C | 29.4°C | 25.7°C | 20 | 8.7 h | 7.3/10 |
| October | 26.7°C | 28.5°C | 25.1°C | 27 | 8.9 h | 7.3/10 |
| November | 26.5°C | 28°C | 25°C | 26 | 8.7 h | 7.3/10 |
| December | 26.2°C | 27.7°C | 24.8°C | 20 | 9.7 h | 6.2/10 |
Top alternatives in May
Egypt
Cairo · ⭐ 10
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Dahab · ⭐ 10
Qatar
Doha · ⭐ 9.8
VAE
Dubai · ⭐ 9.8
Frequently asked questions about Koh Samui in May
How warm is it in Koh Samui in May?
In May, Koh Samui averages 28.6°C, with daytime highs of 30.7°C and night lows of 26.8°C.
Does it rain a lot in Koh Samui in May?
May sees around 19 rainy days and about 106.7 mm of rainfall in Koh Samui.
Is May a good month to visit Koh Samui?
May scores 7.3/10 for Koh Samui. Koh Samui offers excellent beach weather with frequent rainfall (avg 28.6°C, 19 rainy days).