The weather was pretty much perfect for us. It rained a bit while we were there, but mostly at night or later in the afternoon, after we had already enjoyed our days outside and so it didn't affect us. Madang is right on the coast of PNG and has some pretty places to snorkel at. If you like to scuba dive, it is also a great place for that, but for most of us, snorkeling is still pretty great.
I don't always get to go on vacation with others, it can just be hard to coordinate schedules that make it possible to be gone at the same time, so this was fun to do it with a group of us.