Not much choice there, very narrow entrance, and we know nothing of their reason for being out in those conditions. Once the wave is past, they are pretty much in the right direction only yards from the entrance, the wave carried them a little too far and they have to adjust for it.
Now that's impressive. I especially like the write up on Cam's link:
"Here are some cool shots of a sailboat (looks like a Beneteau) entering the port of Zumaia in the north of Spain. Not sure what these guys are thinking... but you got to have some balls or be very nuts to attempt this."