Koh Samui · SpringMonth summary
Koh Samui weather in March
✅ Good
🌡️ Temperature min / max
79°F – 86°F
🌧 Rainy days
35% of days
☀️ Sunshine
11.0h per day on average
🌊 🌊 Season
Spring
⭐ ⭐ Weather score
7.9/10
📅 📅 Best month
March (7.9/10)
Quick decision
Should you visit Koh Samui in March?
✅ Good
✅ Yes if: you want to explore cultural sites and local food.
❌ No if: you need guaranteed sunshine for photos or outdoor activities.
Our take: March is a good time to visit Koh Samui. March remains slightly better (+0.0 pts).
By trip type
Koh Samui in March by trip type
- 🏙️ 🏙️ City break / culture : ✅ Good
- 🚶 🚶 Outdoor activities : ✅ Good
- 🏖️ Beach / swimming : ✅ Good
- 💰 💰 Budget : 💸 Peak season
Local context
What to expect in March
Spring marks the start of the good season in Koh Samui. Temperatures rise (30°F) and tourists have not yet arrived en masse. Expect rain on 35% of days — a light raincoat in the bag is recommended. A good balance between weather and crowds, even if March (7.9/10) remains theoretically better.
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All months for Koh Samui
Annual table
Month-by-month comparison
| Month | Min °F | Max °F | Rain % | Precip in | Sun h/d | Score |
|---|---|---|---|---|---|---|
| 🌤️ January | 75°F | 82°F | 57% | 0.2in | 10.9h | 7.6/10 |
| 🌤️ February | 77°F | 84°F | 48% | 0.1in | 11.0h | 7.8/10 |
| 🌤️ March | 79°F | 86°F | 35% | 0.1in | 11.0h | 7.9/10 |
| 🌤️ April | 79°F | 88°F | 49% | 0.1in | 11.2h | 7.4/10 |
| ⛅ May | 79°F | 88°F | 65% | 0.1in | 11.1h | 7.2/10 |
| 🌤️ June | 79°F | 88°F | 54% | 0.1in | 10.9h | 7.3/10 |
| 🌤️ July | 79°F | 88°F | 59% | 0.1in | 10.0h | 7.2/10 |
| 🌤️ August | 79°F | 88°F | 59% | 0.1in | 10.6h | 7.2/10 |
| ⛅ September | 79°F | 86°F | 67% | 0.2in | 10.0h | 7.1/10 |
| 🌧️ October | 77°F | 84°F | 88% | 0.3in | 9.9h | 7.0/10 |
| ⛅ November | 77°F | 82°F | 83% | 0.4in | 10.0h | 7.1/10 |
| ⛅ December | 75°F | 82°F | 63% | 0.3in | 10.5h | 7.4/10 |
Ideal
Fair
Challenging climate
◀ Current month · Source Open-Meteo · 10 years
📊 Data source
Data based on 10 years of ERA5 records via Open-Meteo, with ECMWF seasonal adjustment. In March, Koh Samui averages 86°F, 35% rainy days and 11.0h of sunshine per day. Overall weather score: 7.9/10.
See methodology →
Comparison
March vs March (best month)
The best month is March (score 7.9/10). Difference:
- 🌡️ Max temperature : +0°F
- 🌧 Rainy days : +0%
- ☀️ Sunshine : +0.0h/day
FAQ
FAQ — Koh Samui in March
Is March a good time to visit Koh Samui?
March is an excellent time to visit Koh Samui (score 7.9/10). With 86°F, 11.0h of sunshine and 35% rain, conditions are very favourable.
What to do in Koh Samui in March?
With 86°F max and 11.0h of sunshine, focus on cultural sites, museums and local gastronomy.
Accommodation
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Activities & tours
Activities and tours in Koh Samui
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