YES 10 fts waves on the surface. No one opted for a second dive except me and my normal buddy. Calm underneath. Another time we had an unexpected 50mph wind shear after we went down. The 38ft catamaran boat got spun around. Lots of lighting all around also. During the 80ft. dive it got dark and what seemed like camera flashes. If the boat got hit we would all be fryed below. When we got to the surface and on the boat. The storm was all over and wondered what happened that the boat looked a little messed up. Also the crew looked unrested. White lightning was all around the boat while we were down. 6ft. waves on the surface. White lightning is when it hits the water. Otherwise its no big deal while your down. Another time was in Cozumel. The port of harbour closed for a hurricane that was bypassing us on the east side of the island. That meant no boat diving. So my buddy and I grabbed some tanks from the shack along the beach. Waves were only 3 ft. and this was a shallow dive around 15ft depth. Its was calm and quiet below. Great dive because we only got caught coming out in a 3 ft surf. and given a free lecture besides.