We've had some really clear horizons lately. We've been able to see St. Croix to the south which is 40 miles away. We've also been able to see Culebra and Vieques (Spanish Virgins) to the west which are around 20 miles away. Yesterday Culebra was so clear that you could see the houses scattered over the island and see the outline of Puerto Rico behind it, which is 40 miles away.
I know this time of year we really don't want clear horizons. Hazy conditions helps to keep storms away but I'm really enjoying the beautiful views :-)