Watch live: Jacinda Ardern's post-Cabinet press conference

Prime Minister Jacinda Ardern is set to outline her plans for a Pacific Mission at today's post-Cabinet press conference.

She will be undertaking the trip with Foreign Affairs Minister Winston Peters for five days from March 4.

They will be visiting Tonga, Samoa, Niue, and the Cook Islands.

Peters said today it would be an honour to have the Pacific Mission led by the Prime Minister and it would be a further sign of the importance New Zealand attached to Pacific neighbours.

"The government carefully considered whether the Pacific Mission would impose a burden on Tonga and Samoa in the wake of Tropical Cyclone Gita."

"However the government decided to proceed to allow the delegation to see first-hand the ongoing response. We will also discuss with the governments of Tonga and Samoa, as much as able to be learned at this point, what support is required for long-term recovery," he said.