As you would probably expect, Lana'i has some beautiful weather, just like any other spot in the Hawaiian Islands. It's hard to find a bad day in Hawaii, and you will often wake up to clear blue skies and sunshine. The temperature in Lana'i stays very consistent, and if you like sunshine and warm days, this is the place to be. In the winter, the temperatures will be a bit lower, but you will still have extremely warm weather and great sunny days. You can expect the temperature to drop a bit at night, but nothing too extreme. You should probably have at the very least a pair of pants and a sweatshirt with you incase it gets very chilly. If you visit in the summer, you will find that it is very hot and there is plenty of sunshine. You should pack with clothes that will suit the weather. T-shirts, shorts, and bathing suits are among the necessities you will want to have with you on Lana'i. There is a good chance that you will encounter a good amount of tourists during the winter because so many travelers try to get away from the snow. Keeping that in mind, you might find it better to visit during the spring or fall.