Errr in that case, I'm glad Eric is doing this trip. The seas usually are ocean swells with wind either creating counter-waves (BIG and ROUGH!) or just rough. And you are out on the boat ALL DAY! Also don't forget... it is winter there so even if you can handle the water temp, you come up to cold breeze which can bring your core temp down very quickly.
How long was the ride out on the dinghy? The sea did not look very calm! My main bane of scuba diving, motion sickness! I once threw up on a 2 minute boat ride from the beach in front of the hotel to the divesite in Dumaguette, the Philippines
Actually I remember Dumaguette has an offshore wind which causes swelly conditions.