Autumn Diving Conditions in Crete (September–November)

Autumn diving conditions in Crete: warm September seas, October visibility highs, and what November brings as winter approaches.

Category: Conditions

Date: Updated 2026

Read time: 8 min

Conditions

Updated 2026

8 min

Autumn divers descending along a Cretan reef wall

Diver next to a reef wall in autumn sunlight

Autumn — warm water, fewer divers, peak pelagic activity.

Autumn diving conditions in Crete: warm September seas, October visibility highs, and what November brings as winter approaches.

Ask any working dive instructor in Crete for their favourite season and most will say autumn. The water is still summer-warm, the crowds are gone, and pelagic activity is at its annual peak.

Autumn at a glance

Visibility & sea state

Water temperature & exposure

Marine life

Best sites in autumn

Planning your trip

September feels like late summer underwater. October is the sweet spot for visibility. November begins the transition: the first storms arrive, but the water is still 20°C+ and many days are perfectly diveable.

Visibility regularly reaches 30m+ in September and October as plankton activity drops. November can be more variable, with occasional storms reducing viz briefly before settling back to 20–25m.

Water temperature: ~25°C in September, ~22°C in October, ~20°C by late November. A 5mm full suit covers the whole season comfortably; add a hood from mid-November.

Pelagic activity peaks. Schools of barracuda are reliable, amberjack and dentex sightings are at their highest, and tuna passes are still possible into early October. Octopus and cuttlefish are large and obvious. Night dives in September are particularly memorable.

Every site is in great shape through September and October. Koutalas Reef and Elephant Cave hold their viz longest into November when storms start affecting more exposed sites.

If you can only travel one month, late September to mid-October is hard to beat. Warm water, top visibility, full marine life and quiet boats.