Though there are only nine islands in the North Aegean they are widely dispersed; you will probably have to pick and choose between them, which is heartbreaking.
One place you should definitely go is Lesvos and Chios, one of the top rated diving areas in all of Greece. You can tour shipwrecks, peruse underwater caverns, and swim alongside tremendous sea walls. You are certain to see vibrant wrasses, perches, and flickering tunnies.
Besides the tunnies you can come across huge tuna and even swordfish. Larger marine life idles by on occasion, and you may just get lucky enough to see a sperm whale during your trek out to your dive site. Keep an eye out in shallow reef areas, you may run into turtles if the season is right.
The Northern Aegean islands form the northernmost group of Greek islands. They are welcomed with hot, dry summers and sea temperatures ranging from 22-26°C, to a cooler 15-18°C in the winter meaning scuba diving in North Aegean can be enjoyed year round.
A 3/5mm wetsuit is recommended in the summer and 5/7mm wetsuit in the winter months.
Fly or ferry to individual islands, or charter a boat for the ultimate excursion. On the larger islands like Chios and Lesvos public transportation is available and efficient.
This page wouldn't be possible without contributions from the following PADI members: Lesvos Scuba Oceanic Centre. Disclaimer