Under normal circumstances, seals and other pinnipeds are found in cold to temperate regions worldwide. However, as the population of some species of seals goes up, their range gradually expands in the process. Perhaps the most famous species that are the epitome of seals wandering outside of their usual range are the Harbor seal and the Hooded seal.
The Harbor Seal is normally found in the cold and temperate regions of the north Atlantic and Pacific oceans. However, on the Atlantic coast, the wikipedia article mentions "the population of the Harbor Seals on the Atlantic coast is increasing quite steadily as they are reclaiming parts of their range and have been seen as far south as Florida." Perhaps maybe one day, we will see them continuing the legacy of the extinct Caribbean Monk Seal.
The Harbor seal is not the only seal with an expanding range as time goes on. The Hooded seal is also popping up in places outside of their normal range. The IUCN red list web page on the Hooded seal mentions "vagrant Hooded seals appear in places like the Canary Islands, Bermuda, Turks and Caicos islands, Puerto Rico, Virgin Islands, Haiti, Jamaica, and other places outside of its natural range." This means that the Hooded seal may already be continuing the legacy of the extinct Caribbean Monk Seal.
With these reports considered, these seal species are wandering to so many places outside of their normal range.
http://www.iucnredlist.org/details/6204/0
http://en.wikipedia.org/wiki/Harbor_seal
