Hi there! Am investigating a snorkel adventure for my son, age 15 & myself. I've started looking into it, and get more confused ever page I turn to! 1st, we want warm water! 2nd, lots of fun tropical sealife. 3rd, avoid the oil, of course. 4th, possible everglade adventure! What kind of weather (and water temp) would we find come February, possibly April, or even late July? WHERE to go!!! Thank you for any input!