The three Gili Islands of Trawangan, Air and Meno, located off Lombok promise something for everyone. Turtles are undoubtedly one of the highlights of diving around the Gili Islands – both green and hawksbill species are abundant.
Reef sharks are frequently spotted, along with tuna, barracuda, trevally and occasional passing eagle rays. There is broad range of marine fish, most notably including, sweetlips, pufferfish, angelfish, batfish, butterflyfish, lionfish, scorpionfish and schooling snapper, fusilier and damsels. On the rubble and sand patches look out for odd shaped bottom dwellers and critters.
The best time to go to Gili Islands would be September to November, for the best weather yet not too packed with tourists. You may want to avoid the rainy season from November to April, but it does not really rain that much and the peak tourist seasons are July-August and December-January.
The Gili Islands can be accessed from Lombok and Bali by boat and also from the island of Nusa Lembongan. Boats from Bali leave from Sanur Beach and Padang Bai ferry terminal, boats from Lembongan depart from Jungutbatu beach and boats from Lombok (local boat) leave from Bangsal Harbour or (by fast boat) from Teluk Nara and Teluk Kodek.