The best times to visit Seychelles are April, May, October and November. These months represent the transition times between the hot and humid northwest trade winds (from November through March) and the cooler southeast trade winds that define April through October.
A visit during these shoulder months offers more mild conditions ideal for sunbathing, wildlife watching and scuba diving. No matter when you visit, you'll encounter temperatures averaging in the 80s. But by frequenting the islands in the spring and fall, you'll also avoid the heavy tourist crowds that descend on the islands in December, January, July and August.