Well, I'm in Ontario, and we've got winter coming at us too, though it doesn't sound as bad as what you've got.
If you like a relaxed place to hang, go diving and fishing, you'll love it. We're coming down Jan. 15, and going to Placencia for a bit, and then Caye Caulker. This will be our 3rd time in Caye Caulker, our 5th in Belize. Just love it! Looking forward to Belikins at the Lazy Lizard, watching the sunset.