Bangkok vs Koh Samui

Bangkok and Koh Samui are closely matched in March. Neither city has a clear advantage across all metrics. Your decision should come down to personal preference, cultural interests, and travel logistics rather than weather alone.

Bangkok can feel quite hot at 34°C, so plan for heat. Koh Samui is also comfortable at 26°C.

For travelers who prioritize dry weather, Bangkok is the stronger choice in March.

Bangkok reaches an average high of 34°C (93°F) and drops to 25°C (77°F) at night during March. The daily temperature range is 9°C, meaning moderate variation throughout the day.

Koh Samui averages 26°C (79°F) for the high and 24°C (75°F) for the low, with a daily range of 2°C. There is a notable 8°C gap between the two cities, so expect a very different feel.

Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in March.

Bangkok receives approximately 40 mm of rainfall across 6 rain days during March. Rain is occasional, so a light rain jacket should suffice.

Koh Samui sees 89 mm over 10 rain days. That makes Bangkok the drier option by 4 rain days and 49 mm of total precipitation.

Both cities share similar humidity levels at 82%.