Tioman Island

Tioman is in the east coast of peninsula Malaysia.
The Northeast Monsoon is from November to March every year so its a bad time to go there. You really dont want your holiday ruined by heavy rains daily or even worst, the resort may close last minute as ferries cannot operate
If you would still like to visit a nice island then you may want to look at your options on the West side of malaysia during that time as the Southwest Monsoon is from late May to September. So you will enjoy the clear skies. Langkawi island is on the west coast which can be a good option for you.