Koh Samui vs Bangkok

Koh Samui and Bangkok 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.

Koh Samui sits in the comfortable travel range at 26°C. Bangkok runs hot at 34°C.

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

Koh Samui reaches an average high of 26°C (79°F) and drops to 24°C (75°F) at night during March. The daily temperature range is 2°C, meaning relatively stable temperatures from day to night.

Bangkok averages 34°C (93°F) for the high and 25°C (77°F) for the low, with a daily range of 9°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.

Koh Samui receives approximately 89 mm of rainfall across 10 rain days during March. You can expect rain roughly every other day.

Bangkok sees 40 mm over 6 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%.