Porkkala sits on Finland's southern Baltic coast and offers six sites in brackish water, covering reefs, wrecks, and artificial structures at depths from three to forty-one metres. The wreck park includes historically significant vessels such as the Klaus Oldendorff and Sundsborg, with underwater information plates fitted to some wrecks to aid orientation. Entry is available from both shore and boat, and the site mix suits beginners through to advanced divers. Surface temperatures warm noticeably in late summer while bottom temperatures stay cold throughout the year, and visibility in Baltic conditions ranges from low to very good depending on season.
Monthly water temperature across Porkkala's sites, from satellite sea-surface data corrected for depth. The band shows the site-to-site spread.
Surface temperatures peak in late summer and fall sharply through autumn, while bottom temperatures remain near four degrees Celsius year-round, making a drysuit the sensible choice on all but the shallowest summer dives. Visibility is at its best in summer when stratification is strong and surface light is long.
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Water temperature around Porkkala ranges from about 2°C in February to 14°C in August, based on satellite sea-temperature data for its dive sites.
In the warm season (about 14°C) a 7mm or semi-dry suit is comfortable in Porkkala; in the coldest months (about 2°C) step up to a drysuit.
Fin maps 6 sites in Porkkala (6 scuba diving sites).
4 more sites to explore
