Prime Minister Scott Morrison and his Pacific counterparts are negotiating the final communique from the Pacific Islands Forum.
During negotiations, Mr Morrison announced $2 million to help the Pacific deal with oil spills and other maritime pollution events.
But Australia's at odds with smaller nations over the mention of coal and reducing emissions in the document.
The Australian Institute's Climate & Energy Director Richie Merzian says Mr Morrison's putting his "fixatiion" with coal ahead of the survival of the Pacific.
[Director Richie Merzian: "Prime Minister Morrison claimed Australia was a member of the Pacific family, yet he's turning his back on their single greatest concern. Climate change impacts are being felt in the Pacific right now. The Pacific have asked their largest and wealthiest neighbour to do the right thing."]
Smaller island nations have announced their own climate change declaration, which calls for an immediate global ban on the construction of new coal-fired power plants and coal mines.
It also says global temperature rises should be limited to 1.5 degrees, which New Zealand Prime Minister Jacinda Ardern has supported.
