Warmed and cooled by the trade winds, the weather in The Bahamas Out Islands is always perfect for tropical vacation getaway. Temperatures in most of the Out Islands of The Bahamas linger between 70 and 80 degrees Fahrenheit, thanks to the constant gentle trade winds. And that means The Bahamas really don’t have an off-season. Of course, temperatures vary by location of each island and also a Caribbean resort’s location on its island. September to May is the most popular time for visitors to the Out Islands of The Bahamas, when temperatures average from 70 to 75 degrees a day. Nighttime temperatures cool down just 5 to 7 degrees.