Feel free to call Vela Maui before you go. Maui is a lush tropical destination. The rain that produces the lush vegetation is more frequent in the winter months, so expect it to be a little wetter and somewhat cooler in winter, drier and a bit warmer in summer. Generally it will be in the mid-80's during the day and slightly cooler at night. Bring a light jacket for evenings and a very warm one if you plan on catching the spectacular sunrise on top of Haleakala.
People dress casually on the island.
Only in some of the most expensive restaurants would a coat or dress be expected. We recommend that you bring some cash, travelers checks and a major credit card. The Maui Windsurf Company will accept credit cards for any additional services or goods you may want to purchase on-site. Most establishments on the island accept major credit cards. You may go home with most of it, but if you want it, you'll have it.