Thanks Kirt,
As you say winter is approaching but I live in the far north of Australia - Far North Queensland actually - and we sail all year up here. It's very tropical. The water and air temperature never get below about 25C (80F), I don't even own a wetsuit or wet weather gear - it's shorts and a t-shirt all year.
In fact winter is the best time to sail up here. Sometimes in the summer it gets a bit hot and humid.
Thanks for the offer of help.
Rob.