I speak only for myself, but it wasn't too bad. At one point I was getting a bit cold so I poured some hot water in my suit and put on an insulated jacket. We spent about an hour swapping tanks, eating, and drinking. Filled my gloves with hot water before putting them back on so that wasn't too bad. They almost felt warmer on the second dive. Started to feel a bit cool when we got to 40 feet, but not bad.