The Australian Broadcasting Corporation reported that UN chief visited New Zealand this week and before travelling to Fiji where he will meet with Pacific island leaders in Suva for the first time.
Guterres has described the Pacific as the front line of climate change with rising sea levels threatening the very existence of the small island nations.
Pacific leaders were in Fiji this week attending the Climate Action Pacific Partnership Conference, which aims at boosting the international effort to tackle global warming.
Fiji's Prime Minister Frank Bainimarama has specifically called out Australia for what he says is a lack of action and understanding, Radio New Zealand International reported.
"I have to say, I was no shining example of traditional Pacific politeness when I'm speaking for people whose homes and livelihoods are destroyed by rising seas. I don't have time to be quaint or cute," Bainimarama said.
"We have politicians next door saying we can't expect them to act on climate and Pacific islanders can just move to higher ground. But we know that some of our nations don't even have higher ground to move".
The conference was timed to coincide with a visit to the region of Guterres, who will visit Tuvalu and Vanuatu after his visit to Fiji today. The secretary general of the Pacific Islands Forum Secretariat, Meg Taylor, has Tuvalu and Vanuatu as the most vulnerable to the effects of climate change in the region.
This week's meeting in Fiji will is intended to get Pacific leaders to form a position to take to a global summit in New York in September, which will be hosted by Guterres.