I'm not sure when seabirds disperse from their colonies. Cape St. Mary's is fabulous but good to try to avoid being fogged in, less impressive then. There are numerous boat tours in Witless Bay area - they are mostly whale-focussed and treat birds as a bit of an afterthought, however. Cape Spear is a good place to go for a short excursion, Cape St. Francis for a medium one (great blueberries), whole Irish Loop south of St. John's, including Cape Race, for a full day excursion. Check both nf.birds google group and Newf. birdwatching group facebook page for rarities, they can get some great ones!
