Zakynthos cave-season context and sulfur-water visibility note.
Schwefelhöhle Zakynthos: boat cave dive with a sulfur chamber.
Schwefelhöhle Zakynthos: boat cave dive with a sulfur chamber.
Save it, log a dive, or explore nearby on the map.
Save it to come back later
Boat access and small cave entrances make a local guide the practical default.
Schwefelhöhle Zakynthos is a boat-reached cave-and-grotto dive on southern Zakynthos with sponge-covered rock, a dark overhead chamber, and a sulfur layer that can turn part of the route milky. It suits careful divers who want a guided route and steady Mediterranean fish life, and it is easiest when you move slowly through the entrances, keep buoyancy tight, and let a local guide handle timing around the cave openings.
Conservative baseline from public research. No community dives logged yet.
Depth range, seasonality, and planning context.
Reported Depth
0m - 30m
Depth Note
Several caves/grottos are in the 0–12 m range, with a deeper area down to about 30 m.
Best Season
Late spring to early autumn, with boat diving available outside the winter break.
Typical Conditions
Boat-reached cave and grotto site with mild currents, a clear outer approach, and a sulfur chamber that can turn cloudy.
Hazards, restrictions, and access requirements.
Key Hazards
Safety Notes
Caves/grottos create an overhead environment; stay within training and comfort limits and manage depth appropriately if visiting the deeper section.
Access Restrictions
Boat access only; some cave entrances are small, so a skipper or local guide is the easiest way in.
Legal Notes
Follow Marine Park rules and local cave-entry guidance if your route runs inside protected waters.
Community notes to help plan your visit.
Scuba Diving
Depth ranges from 0–30 m, with caves/grottos mostly in 0–12 m and a deeper area to about 30 m; described as suitable for beginners through advanced divers.
Freediving
Freediving is secondary here; the overhead sections are better left to scuba.
Snorkeling
Snorkeling is only a fit near the easier openings; the cave route itself is scuba-first.
Community dive logs and visit reports for this site.
Average conditions based on logged dives & visits.
Planning answers for access, conditions, timing, and site logistics.
Last Updated
Research Sources
Zakynthos cave-season context and sulfur-water visibility note.
Keri cave route, boat access, local-guide default, and sulfur visibility context.
Boat-only Keri cave access and sulfur-spring cave context.
Destination-level visibility and current baseline for Zakynthos scuba.
Official Greek tourism context for Zakynthos diving facilities and marine-park support.
Know this site? Improve Spot Details.

Keri Caves is a boat-access cave site off Zakynthos that is commonly visited on

Dick & Doof is a Zakynthos dive site where trips are commonly planned around the

Boat-access wall dive with an arch, caves, and rich fish life

Boat-access Zakynthos rock pile with macro life and swim-throughs.