Bangkok vs Koh Samui

Bangkok and Koh Samui are closely matched in October. 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 30°C, so plan for heat. Koh Samui is also comfortable at 25°C.

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

Bangkok reaches an average high of 30°C (86°F) and drops to 24°C (75°F) at night during October. The daily temperature range is 6°C, meaning relatively stable temperatures from day to night.

Koh Samui averages 25°C (77°F) for the high and 23°C (73°F) for the low, with a daily range of 2°C. There is a notable 5°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 October.

Bangkok receives approximately 194 mm of rainfall across 21 rain days during October. Rain is frequent, so waterproof gear is essential.

Koh Samui sees 282 mm over 26 rain days. That makes Bangkok the drier option by 5 rain days and 88 mm of total precipitation.

Both cities share similar humidity levels at 82%.