Koh Samui in July

Weather in Koh Samui in July

Hot and mostly sunny. Temperatures 30–35°C. Rainfall is low — brief afternoon showers possible but nowhere near the wet season levels. The sea is calm and clear. Excellent conditions for beach swimming, snorkelling, and day trips.

Crowds & Prices

Moderate. July is a European school holiday month, so there is a noticeable increase in families. Still far quieter and more affordable than December–February. Hotels have good availability.

Best Things to Do in July

• 1Ang Thong Marine Park — calm seas make this one of the best months for the boat trip
• 2Koh Tao diving day trip — clear water and calm conditions
• 3Full Moon Party on Koh Phangan (check lunar calendar for July date)
• 4Chaweng and Lamai beach relaxation
• 5Snorkelling at Koh Tan and Koh Matsum
• 6Waterfall visits — Na Muang 1 and 2 flows well year-round
• 7Sailing and kayaking — excellent wind conditions in July

Travel Tips for July

• July is genuinely one of the best months for Koh Samui — sun, sea, and lower prices.

• Book Ang Thong Marine Park through a tour operator as independent boats are difficult to arrange.

• The Full Moon Party in July is particularly popular — book Haad Rin accommodation well ahead.

• Bring reef-safe sunscreen — July sun is intense.

• Car or scooter rental is recommended for exploring the island — public transport is limited.