Ige said concerns from the visitor industry were considered, but he said he made this decision on the health and safety of Hawaii residents and the efforts they are taking to get both vaccines and boosters.
State health director Dr Libby Char said even though booster shots are not required currently for travellers, they continue to be effective in reducing serious illness.
"Omicron case counts are dropping but we don't know if or when we may see another surge in cases of COVID-19. Getting vaccinated and boosted now will help to prevent you from becoming seriously ill," she said.
On Friday, the country announced plans to remove a newly imposed booster mandate that would require people to have their booster to eat inside restaurants and bars or use gyms.
Now, the county will only recommend people be boosted to take part in these activities. The reversal came after restaurant owners complained that it would lead to lower spending and increased cancellations, according to Maui Now.
In order to enter Hawaii, Americans returning from overseas must present a negative Covid-19 test taken no earlier than 24 hours before departure. International travellers must provide both a negative test that was taken within 24 hours of departure and proof of vaccination.
Currently, there are no pre-travel testing or other requirements needed for inter-county travel between the Hawaiian Islands.
— Associated Press with additional reporting
