Australia plans to spend more than $600 million next financial year on Pacific aid projects, including addressing the impact of climate change.

A statement from Australia's High Commission in Fiji said the federal budget had allocated $610.1 million for Pacific aid projects during 2008-09 financial year, a jump of $80 million from the current financial year.

Included in the total is an estimated $150 million three-year program to meet climate change adaptation needs.

There have long been concerns among some low-lying Pacific countries that they will need assistance to cope with rising tides and more frequent storms, as the impact of global warming is felt.

Australia will also spend an estimated $236.4 million in funding for the Regional Assistance Mission in the Solomon Islands (RAMSI), a small rise on last year.

While Vanuatu and Samoa will both enjoy increases in aid from Australia, in recognition at their reforms and strong economic management, Fiji has had their aid levels frozen at about $26.9 million.

Since the military coup in December 2006, which saw the democratically elected government ousted, Australia has introduced targeted sanctions against the nation.

"While other countries in the region will see increases in aid through regional programs including Pacific Partnerships for Development, additional assistance to Fiji is subject to an early return to democratic rule," the statement said.

Aid to Nauru has been budgeted to be $26.6 million, broadly equivalent to the amount given last year, it said.

The contentious areas of customary land rights in the Pacific has been allocated $54 million during the next four years via the Pacific Land Program.

Efforts to eliminate avoidable blindness in the Pacific will be tackled with an allocation of $45 million during the next two years, with another $300 million to be spent on access to clean water and effective sanitation during the next three years.