In summer it depends on the wind. With the Bora a shorty or heat seeker is recommended, otherwise board shorts and a polypro lycra can be sufficient. In winter it can snow: drysuit, gloves, boots and hood.
Good spot when the wind is northerly. Not famous for wind but from year to year can be very different, no regular pattern. Usually spring and autumn have stronger winds more often but sometimes you can have really good days in mid August. The Bora can hit with 30-40 knots.
Close to Venice, just a short boat trip to the East. By car a longer way around the lagoon. Drive Northeast on the 14, drive to Jesolo and then all the way West to Punta Sabbioni. From Jesolo about 25 km. The launch is near lighthouse.