No, coastal realms on BT are 100% guaranteed to be getting less badly hit by monsters than central realms right now, due to aspects of the way they decide where to rampage.
(Basically, a monster at point A who wants to go to point B may be just as likely to pick a coastal region as an inland region as their point B, but the regions between A and B are vastly more likely to be inland than coastal, and they get hit even if the monsters aren't hanging around there.)
