We've been to Vanuatu before so are well aware of the stinking hot and humid conditions that the pacific islands provide. As for the snorkelling, will make sure before we go. Aparently there is a natural spring at the resort we plan on staying at, that has been tested and complys with NZ standards etc etc
We'll be in Apia, but the other side of the island from the city (30 mins according to them, 25 miles)
We can also go diving through our resort aswel, they appear to have good contacts with a diving outfit