Pacific Island states are planning a new resilience fund to pay for retrofitting vital infrastructure in the face of extreme weather and climate impacts.

And their peak body, the Pacific Islands Forum, is getting advice from Australia's treasury and finance officials on how to fund the $1.5 billion they estimate they'll need for the task.

The issue has been central in two days of discussions between the secretary general of the Pacific Islands Forum, Dame Meg Taylor, and Australian officials and ministers in Canberra.

