There doesn't even have to be wind
blowing locally to get a rage going at those Atlantic-side passes. We were waiting at Great Guana Island for a rage to subside in the Whale Cay pass. There was no wind at all--the water
was glass. The large swells causing the rage were generated by a big storm far to the north in the open ocean. When they reach the shallow Bahamas
passes, they rise up and break. A sailboat was rolled over on her beam ends that day, and the husband thrown off. He was recovered by a nearby boat.
We went through the next day after listening to an "all clear" on the local VHF
net. Again, it was glassy smooth with no wind. When we got to the north end of Whale Cay and started turning west, one of the crew said, "Hud, you might want to take a look at this!", pointing aft. It was a 10' breaker that came out of nowhere. We got a good surf out of it and managed to avoid getting carried onto the shoals.