The southern sun runs not only hot, but bright. Coming it at a near perpendicular angle not only allows for the shortest path through the atmosphere, it also eliminates much of the reflection caused by an angular approach. The caribbean just gets more of the sun than the low countries.
It shouldn’t have been a problem for ol Al. He’d been sailing round those parts for years, working his way up from Colonel to the Rear Admiral and Commander of the ships. Putting down a slave rebellion will do that for one’s career. When William needed a new Governor for an island recently reacquired from the French, A military man with a history with the island seemed ideal.