We were in Waikiki on a Sunday when there were thunderstorms all day and it rained about 6 inches. The forecast for the next day was 80 change of rain, so we booked this submarine for the next day because we wanted to have something to do if it was raining all day again. As it turned out, it only rained in the morning and our submarine trip was at 1:00. We really enjoyed the tour. The guide onboard was so good to point out sea turtles and fish and she explained all about the planes and other items that were on the bottom of the sea. it was cool to go down 122 ft below sea level. I was surprised that at that depth you can't see a lot of the colors because of lack of sunlight but it was all interesting. Definitely worth the few hours that it takes.