if you're a member of a gym, try some bike run sessions. 10 mins on the bike followed by a 5 min run. Wouldn't worry too much about getting out on the bike this time of year. Most people ( men and women ) keep their all in one swim suits on, after the swim and do the bike run wearing the suit.
Did see someone wear their wetsuit on the bike section in an ITU race on TV, the comentator, Steve Trew had never seen that done before.