Koh Samui Weather in August

Thinking of visiting Koh Samui in August? Expect very high temperatures reaching 30°C (86°F) during the day, dropping to 27°C (81°F) at night, and note that quite a bit of rainfall is likely.

Rainfall in Koh Samui in August

The climate data from previous years indicates about 17 days of rain, averaging 103 mm (4.1 in) for the month. This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.

Temperature in Koh Samui in August

If you're visiting Koh Samui in August, expect highs of 30°C (86°F) and overnight lows around 27°C (81°F). It's usually most comfortable outside during the morning and later in the day. With overnight lows of 27°C (81°F), nights stay very warm. Air conditioning makes a real difference if you're sensitive to heat. A cold shower before bed can also help you get to sleep more comfortably.

Sunshine in Koh Samui in August

The month experiences a moderate amount of sunlight, with 152 hours of sunshine. This provides a nice balance between sunshine and clouds.

Average water temperature in August

At 29°C (84°F), the water is very warm, more like a heated pool than the sea. Great for those who like warm water, though some may find it less refreshing on a hot day.

If your ideal day consists of dry skies and pleasant temperatures, January and February typically offer the best circumstances for Koh Samui.