News f2s a écrit:

The Bay of Biscay is notorious for amplifying big ground swells,
and during winter, these are frequent.

Have a look at this :

http://www.wannasurf.com/spot/Europe...ntry/belharra/

These waves, up to 20m (65') high, breake about 1 nM ashore over a reef
located close to Saint Jean de Luz harbour, France.

You can read : "It need at least 20 feets to start breaking at hight
tide. The bottom is 15m deep at low tide. Noone knows how big it can
be..."

--
Peio