County Galway dive sites

The Aran Islands are reached by ferry from Rossaveal in Connemara, approximately 40 minutes west of Galway city. The ferry crossing to Inis Mor, the largest island, takes about 40 minutes. Aer Arann operates small aircraft from Connemara Airport to all three islands with a flight time of eight minutes. Diving is typically arranged through operators based on Inis Mor or through mainland Galway dive centres that run boat trips to the islands. Weather-dependent schedules are common, particularly for the more exposed southern and western dive sites.

The Aran Islands sit exposed to the full force of the North Atlantic, and conditions can change rapidly. Water temperatures range from 10 to 16 degrees Celsius, requiring a minimum 7mm semi-dry or drysuit. Visibility is highly variable, from 5 metres after storms to over 25 metres during settled summer weather. Strong tidal currents affect many dive sites, particularly the channels between islands, making tide planning essential. The best and most consistent conditions occur from June through September during settled high-pressure weather systems.

Blue shark encounters are possible during summer months, typically July through September, on dedicated drift dives offshore from the islands. Operators set up baited drift sessions in open water west of Inis Mor where the continental shelf edge approaches. Blue sharks are naturally curious and will investigate divers, often circling at close range. These encounters are weather and current dependent and cannot be guaranteed. Basking sharks are also occasionally spotted near the islands during summer plankton blooms but are rarely encountered underwater.