As HB and I discovered yesterday, the BVIs are a decidedly outdoor place. Our first thoroughly rainy day in a while left HB and I struggling to find rainy day activities -- things we could do inside.
The movie theatre offers perhaps the best option. With a bowling alley in the theatre building and four movie screens, you could stay entertained inside for an extended period of time, as long as you're looking to do it in the afternoon. The bowling alley opens at 2pm, and the first movie showing is usually at 4:30.
There are a few museums scattered across the island, like the Maritime Museum at H. Lavitty Stout Community College, the Virgin Islands Folk Museum on Main Street, and the Lower Estate Sugar Works, but most are small, and few are so fascinating or extensive that a second visit is needed. Still, I admit that browsing BVI Tourism's list of historic sites and museums offered enough variety to occupy you for at least one rainy day.
A favorite rainy-day activity of mine is to go to a coffee shop and enjoy the indoor warmth and a warm beverage, but this option is generally precluded in the BVI by the lack of indoor restaurants, bars, or coffee shops. HB and I did venture out to Trellis Bay for lunch during a break in the weather, but although the cafe we ate at was covered, it was open air, and when the rain resumed, our sandwiches got a little soggy.
All in all, there are a few good options on Tortola for entertainment on a rainy day, but the limited indoor activities give me all the more reason to be appreciative of the sunny good weather we enjoy on a regular basis.