Visiting season is between March to October each year. Resorts close during the northeast monsoon season from November to early March, which sees bouts of heavy rain and rough seas. Perhentian Island ,Redang island ,Lang Tengah Island ,Bidong Island ,Kapas Island ,Gemia Island and Tenggol island has a tropical climate with daily temperatures between 25 Celsius to 35 Celsius and relative humidity between 80-89%.
Resorts at islands open during the non-monsoon months from as early as mid-February to mid- or end-October. Different resorts have different specific opening and closing dates but all are open by 1 March and close by 1 Nov. The best time to visit is between April to September when seas are generally calm. The sea may begin to get choppy close to monsoon season. As Redang can get pretty crowded during Malaysian Holiday and long weekends, avoid these holidays if you to plan your trip.
The busiest months are from May to August, particularly during June school holidays in Malaysia .. March and October are perfect for almost-empty beaches. Going at different times of the year may also offer seasonal encounters with certain marine life. Green turtles usually nest in their greatest numbers in June,July and August while September is probably the best month to spot migratory whale sharks.
In most parts of Malaysia, weekends fall on Saturday and Sunday. In Terengganu and Kelantan states, Thursdays and Fridays are weekend days, with Friday a full off-day as many of the local Muslim residents visit the mosques for Friday prayers. So don't be surprised to see many shops closed if you are in Kuala Terengganu on Fridays. Normal weekends are still busy periods for Islands as many visitors come from other states and country.
The Latest Picture about Monsoon was taken on 22nd December 2008

