| Months | Conditions | Sea |
|---|---|---|
| Dec – Feb | Dry, sunny, comfortable humidity | Calm — best for boats |
| Mar – Apr | Hot, mostly dry, rising humidity | Generally calm |
| May – Jun | Monsoon builds, afternoon showers | Occasionally choppy |
| Jul – Sep | Wettest months, heavy afternoon rain | Roughest of the year |
| Oct – Nov | Monsoon eases through November | Improving toward Nov |
Year-round daytime temperatures sit around 28–34°C (82–93°F), with the coolest, most comfortable air in December and January. Humidity is the bigger variable — it's noticeably stickier from April through the rainy season than in the dry, breezier winter months.
What to pack
- Light, breathable clothing year-round — this is not a destination for layers.
- A proper rain jacket or poncho if visiting May–October; umbrellas struggle in the wind.
- Reef-safe sunscreen — regular sunscreen is genuinely restricted on some Krabi beaches and islands.
- Water shoes for hot springs, Emerald Pool, and rocky beach entries.