East Coast Monsoon (Nov–Feb) – Heavy rains in Perhentian, Redang, and Tioman Islands.
West Coast Monsoon (May–Sep) – Affects Langkawi, Penang, and Pangkor, but less severe.
The best time to visit is March – October when the weather is drier. Highlands like Cameron Highlands and Genting Highlands offer cooler escapes from the heat.