The summit is being held under the banner "Small and Far: Challenges for Growth".
The meeting begins with the Smaller Islands States Leaders meeting, while all of the island countries will be represented at Thursday's meeting of the group of African Caribbean and Pacific group of nations.
The summit proper gets underway on Thursday with the plenary session set for Friday and the leaders retreat scheduled for Saturday.
West Papua an issue
The Forum's failure to undertake a promised fact-finding mission to West Papua.