Hi Elly, Tioman for sure.
Dive Divas will be organising their diving season's last dive trip to Tioman over next weekend Saturday October 20th - Sunday October 21st.
This will be organised via the fast ferry service, which leaves Singapore at 8.30 Saturday morning and returns Sunday evening at 19.00. This is by far the most comfortable the direct way of reaching Tioman and there is still time to do 5 dives. Conditions are very favourable at the moment and visibility is reported to have improved over the past few weeks, so now is a great opportunity for a final weekend diving before the monsoon arrives.
For any further details you can get in touch with divingtrip@expatriatetravel.com
Cheers