Alright, Alice Springs is warm and dry, Cairns is warm and wet! U feel the humidity directly after the first step out of the plane!
But it's a nice small city to visit, rain forest walks, scuba diving, snorkeling and sky diving can be done there, so you can keep yourself busy!!
It's really touristic and there are backpackers everywhere. But there's no beach! Yep the coast is not really the best to chill in the sand and crystal blue water.. mud and brown water is what's waiting for you there.. but in the middle of the city, right aside the ocean, there's a public swimming pool, with some sand benches and that's really cool!
We stayed only few days and we did some snorkeling which was really great! Colorful fishes, turtles, giant clams were here to give us a nice time :)