For most travellers, the best time to visit Mersing is during the dry season, which typically runs from April to September. This period offers the most reliable weather for island hopping and water activities.
During these months, you can expect plenty of sunshine and calmer seas, making boat trips to islands like Tioman and Rawa more enjoyable and less prone to cancellations. The clear waters are superb for snorkelling and diving, and the warm weather is ideal for relaxing on the beaches.
Travellers who prefer to avoid the peak crowds and are comfortable with the possibility of occasional rain showers might consider the shoulder months of March or October. While there's a higher chance of rain, you can still experience pleasant weather, and accommodation might be slightly less busy.
The monsoon season, from November to February, generally brings heavier rainfall and rougher seas, which can significantly disrupt travel plans, especially for island excursions.