The Netherlands Antilles dissolved as a constitutional entity in 2010 — Aruba, Curaçao, and Sint Maarten are now constituent countries of the Kingdom of the Netherlands, and Bonaire, Sint Eustatius, and Saba are Dutch public bodies. The climate question still hangs together, though, because the islands divide naturally into two weather groups.
ABC islands (Aruba, Bonaire, Curaçao) sit just off the Venezuelan coast, outside the main hurricane belt and in a permanently dry pocket. Year-round temperatures hover around 28°C, trade winds blow constantly, and rainfall is genuinely scarce. The driest months are February–April; the wettest are October–December, when brief showers come through but rarely disrupt anything.
SSS islands (Sint Maarten, Saba, Sint Eustatius) sit in the northeast Caribbean and follow the wider regional pattern: dry December–April, wet and hurricane-exposed July–November. September is peak hurricane risk; Sint Maarten was devastated by Hurricane Irma in 2017.
Diving is the year-round draw on Bonaire and Saba — both islands have built their tourism around shore and reef diving. Bonaire visibility is best April–November.