Our scuba diving guide covers what's below the surface — volcanic rock formations, caves and a wreck site. Snorkeling is the lower-commitment alternative, and worth knowing when each actually makes sense.
When snorkeling is enough
Many of the more accessible rock formations near shore, particularly around the calmer bays on the south and east coasts, are shallow enough to see well with just a mask and snorkel — no certification, minimal gear, and you can start and stop whenever you like. If your main interest is a casual look at the underwater volcanic landscape rather than the deeper wreck or cave sites, snorkeling covers a reasonable amount of it.
When diving is worth the extra step
The more distinctive sites — deeper volcanic formations, swim-through caves, the wreck near Kammeni — are genuinely only accessible by diving. If you're already certified, or willing to do a supervised introductory dive with no prior experience (see our diving guide), that's where the more memorable sites are.
Practical comparison
- Cost and time: snorkeling is free or nearly so if you bring your own gear, and needs no booking; diving requires a booked trip, equipment, and — for an introductory dive — a briefing and supervision.
- What you'll actually see: snorkeling shows you the shallows; diving reaches the more dramatic formations most photos of Santorini's underwater scenery are taken at.
- Flexibility: snorkeling can be done spontaneously from many beaches; diving needs a booked operator and set schedule, and is more weather-dependent (see our diving guide on meltemi disruptions).
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