From A Wiki of Ice and Fire
and the location of the Bay of Seals
The Bay of Seals is a bay in the North that extends from beyond the Wall to the shores that fall under the domain of House Umber. The Night's Watch have a castle astride it, Eastwatch-by-the-Sea. The isle of Skagos is situated in it.
A Clash of Kings
Wildlings in little boats cross the Bay of Seals and wash up on Umber lands, causing Hother Umber to demand that a fleet be built to stop them.
References and Notes