Solar Impulse 2, the solar-powered plane attempting to make the first flight around the world without fuel, is delayed in its take off for Hawaii from Nagoya, Japan.

Organizers said Tuesday morning the flight had to be postponed due to worsening weather conditions on the third and fourth day of the five-day journey.

The plane, which was delayed due after weather lead to an unexpected landing earlier in June, was set to depart for Hawaii at 7:30 a.m. Tuesday.

The flight from Nagoya to Hawaii is the longest leg of the venture, lasting five consecutive days and nights, the Solar Impulse 2 team said in a news release.

Swiss explorers and pilots Andre Borschberg and Ber­trand Piccard originally planned for Borschberg to fly the plane to Hono­lulu from Nanjing, China, earlier this month.

Solar Impulse 2 was in the air for one day and 20 hours before weather conditions forced Borschberg to execute an unexpected landing in Japan on June 1.

The flight from Nagoya to Hawaii will be the most difficult leg of the whole round-the-world mission, the Solar Impulse team said in a news release.

The plane departed March 9 from Abu Dhabi, United Arab Emirates, for the planned 25,000-mile trip around the world.

To watch Piccard and Borschberg’s announcement about the delayed take-off visit https://www.youtube.com/watch?v=S-1I9hALdwA