When you think of a vacation to Hawaii, you probably envision sunshine and warm ocean breezes. But just like anywhere else, Hawaii has its fair share of rain. But fear not, there are still plenty of great things to do in oahu on a rainy day.

One of the best ways to spend an afternoon in oahu on a cold and rainy day is to head to a spa. You can find a wide range of spas that offer a variety of treatments to help relieve your stress. You can also try a massage, or even an exotic facial!

Another great idea for a rainy day in oahu is to take a factory tour. This is a great way to learn about the island's history and culture, while taking in the natural beauty of Oahu.

If you're looking for something to do that is a little more out of the ordinary, then consider visiting Pearl Harbor. The historic sites that make up Pearl Harbor incorporate a number of museums, memorials and ships.

Unlike many tourist attractions on Oahu, most of the exhibits at Pearl Harbor are indoors, so you can go in the rain without worrying about getting soaked!

The weather in oahu can change drastically from hour to hour, so it's best to be prepared with an umbrella and a rain poncho. You should also be prepared with a waterproof camera if you're planning on snapping any photos of Pearl Harbor in the rain!