The Australian government's most recent negotiations to strike a critical deal with Singapore to keep fuel flowing could benefit its Pacific neighbours.

Federal Minister for Pacific Island Affairs, Pat Conroy, has indicated he is working out a series of assistance packages across the region.

"Relationships in our region matter more now than ever," Mr Conroy told ABC News on Monday.

Mr Conroy credited Prime Minister Anthony Albanese and Foreign Minister Penny Wong for "doing their job" to build successful partnerships to ensure fuel-supply disruptions were not wrecking the livelihoods of Pasifika communities.

But Mr Conroy stopped short of saying exactly what type of assistance Australia would provide.

"We're continuing to talk to our Pacific neighbours - we're proud to be a part of the Pacific family and to understand what the challenges they are," he said.

"Is it access to fuel or is it the price to fuel, or is it even both, and to explore how we can support their efforts to achieve fuel security, which is critically important.

"Our prosperity and security of our Pacific neighbours, which is why we've engaged so much - whether it's the alliance with Papua New Guinea, the Falepili (Union) treaty with Tuvalu, what we have been doing in Nauru or what we have been negotiating with Fiji right now - also makes Australia safer, more secure and more prosperous.

"We'll be talking to more of the Pacific family about what their needs are."

Canberra secured a deal last week with Singapore to provide 55 per cent of Australia's petrol, 22 per cent of its jet fuel, and 15 per cent of its diesel supplies in exchange of supplying the southeast Asian city-state's gas requirements

The Singaporeans have continued to be Australia's largest source of refined fuel, accounting for more than a quarter of its total imports, ensuring a continued supply and some certainty amid global energy market pressures.

Amid its latest arrangement, Mr Conroy emphasised Australia remains a trusted partner of the Pacific that could well include offloading fuel supplies to several Pacific Island nations.

"I am not going to get into hypotheticals at the moment," he said.

"We're still in the stages of exploring and understanding what their needs are and we'll respond in due course, but our Pacific family, the nations of the Pacific, can rely on Australia.

"We turn up, we listen, we act on their priorities, as it's in our interests as well as theirs."

The Tongan and Nauruan governments are the latest in the region who have tried to ease regional fears this past month.

Tonga's Prime Minister Lord Fakafanua had warned the kingdom it could be heading into unknown territory as tensions in the Middle East threaten shipping routes and supply chains.

Fuel and power supply remains stable but may only last until the end of May, otherwise, should disruptions persist in the Strait of Hormuz.

"As a government, we're prepared to implement policies to help ease up the pressure on supply and demand, whether it's a four-day work week for the government or work from home, Covid-like scenarios - we're prepared to do what we will to extend the current supply as far as we can," Lord Fakafanua said.

Nauru's President David Adeang called for calm and responsible actions on the tiny island, which historically relies heavily economically on Australia.

Mr Adeang advised Nauruans to conserve energy wherever possible while the government monitors the situation after implementing several measures to secure sufficient fuel reserves.

"We are working diligently to maintain essential services and to ensure stability throughout the country," he said.

He had called on the Nauruan public of little more than 10,000 residents to "act responsibly" and use fuel and electricity wisely towards protecting the island's limited national reserve.

Mr Adeang added that the government was prepared to manage the situation responsibly.

"We should stand together as one community supporting each other, conserving our resources and acting with discipline and care, and with unity and cooperation, we can and we will navigate this challenge safely," he said.

Many Pacific nations have also been increasing their calls for a global phase-out of reliance on fossil fuels ahead of the region's meeting of ministers in Vanuatu this week.

Pacific Small Island Developing States (PSIDS) senior officials convened in Port Vila on Monday for the third Pacific Ministerial Dialogue on the Global Just Transition.

Port Vila II, as its known, comes as several island nations grapple with fuel price spikes linked to the ongoing US-Iran conflict.

The Fossil Fuel Treaty Initiative says the situation highlights the region's over-reliance on imported fossil fuels.

Fiji has recorded a 20 per cent increase in petrol prices, Tuvalu has sent government workers home to cut costs, while the Marshall Islands has declared a 90-day economic emergency.

Founder and chair of the Fossil Fuel Treat Initiative, Dr Tzeporah Berman, said Pacific Island nations have long recognised the risks of fossil fuel dependence.

"Pacific Island nations were the first countries to call for a fossil fuel treaty," she said.

"Even before the current supply constraints and high oil prices due to the war in Iran, these countries understood the threat fossil fuels pose to their security and to global climate stability."

The Port Vila meeting is expected to shape a unified Pacific position by Wednesday ahead of the first International conference on transitioning away from fossil fuels later this month in Colombia.

Vanuatu's Minister for Climate Change Adaptation, Ralph Regenvanu, was outspoken in saying the region continues to bear the brunt of a crisis that it did not create.

"The Pacific did not create the fossil fuel crisis, yet we are paying the highest price for it," he said.