The State Department said Blinken would also attend the Fifa Women’s World Cup in Aotearoa.
But first, he will dedicate the US embassy in Tonga on Wednesday – a move many experts say is part of Washington’s plan to counter China’s growing influence in the Pacific.
In February, the US reopened its embassy in the Solomon Islands after a 30-year absence and is planning missions in Vanuatu and Kiribati.
Blinken will meet Prime Minister Chris Hipkins and Foreign Affairs Minister Nanaia Mahuta.