Isosaaren yhteyslaituri is an artificial reef located in the Helsinki and Southern Coast region of Finland. The site offers depths ranging from 10 to 27 metres, making it suitable for advanced divers. Access requires a boat to reach the entry point, despite the shore-entry classification. Divers should expect cold water temperatures, often near 0°C in April, necessitating the use of a drysuit. Visibility typically ranges between 5 and 10 metres, and currents are generally mild. The artificial structure provides a hard substrate for local marine life, which consists of temperate Baltic reef species and invertebrates. Divers should be prepared for entanglement risks and carry redundant cutting tools.

Mattoranta is a shore-entry wreck dive located in the Helsinki and Southern Coast region of Finland. The site sits at depths between 10 and 17 metres, with visibility typically ranging from 5 to 10 metres. This location is suited for intermediate divers looking to navigate a wreck structure. Due to the cold water temperatures characteristic of the region, appropriate thermal protection is essential. Divers should be aware of entanglement risks associated with the wreck and maintain neutral buoyancy to avoid contact with the structure. The habitat supports various temperate marine life, including local fish and invertebrates common to these coastal waters.

Tamglassin ranta is a freshwater dive site located in Helsinki and Southern Coast, Finland, featuring an artificial reef and a wreck. Divers can expect depths ranging from 7 to 12 metres, with an average depth of 10 metres. Access is via a shore entry. Conditions are characterised by cold water and visibility that varies between 1 and 7 metres. The site is suitable for beginners, though divers should be prepared for cold water, potential entanglement hazards, and low visibility. The habitat supports various temperate freshwater fish and invertebrates typical of the region. Local facilities include air fills and equipment rental.

Riihiniemi is a freshwater dive site located in Lake Kaukajärvi, offering a mix of reef, wreck, and artificial reef structures. Divers can explore depths ranging from 3 to 13 metres, with an average depth of 12 metres. The site is accessible via a shore entry and is suitable for beginners. Conditions include mild currents and visibility ranging from 1 to 15 metres. Divers should be prepared for cold water, particularly below the thermocline, as well as potential entanglement hazards and low visibility. Facilities at the site include toilets, changing rooms, showers, a cafe, and equipment rental. Night diving is permitted at this location.

Kaupinoja is a shallow reef site located on the southern coast of Finland, offering a practical environment for beginner divers. The site features a straightforward shore entry and calm conditions with no significant current, allowing for a relaxed pace. Divers typically explore depths ranging from 5 to 8 metres, with an average depth of 6 metres. Visibility is generally around 5 metres, though this can shift depending on weather and wind conditions. Given the variable visibility and potential for overhead environments, divers should maintain awareness of their surroundings and exercise caution near rock formations. Typical dives at this location last approximately 30 minutes.

Saerkijaervi is a freshwater shore dive located in the Helsinki and Southern Coast region of Finland. The site features a combination of reef and seagrass habitats at depths ranging from 4 to 8 metres, with an average depth of 6 metres. Visibility is approximately 5 metres and can vary, making the reef structure useful for orientation. Due to the cold water temperatures, a drysuit is recommended for all divers. This site is suitable for beginners, though divers should be aware of cold water and low visibility as primary hazards. Typical dives last around 30 minutes.

Talviainen is a shallow freshwater reef site located on the southern coast of Finland. Accessible directly from the shore, the site features depths ranging from 5 to 10 metres. The environment is generally calm with no current, providing a suitable location for beginner divers. Visibility typically ranges between 5 and 10 metres. Divers should remain vigilant regarding potential entanglement hazards around the reef structure. As this is a freshwater habitat, the site supports various temperate freshwater fish and invertebrates. Facilities at the entry point are unconfirmed, so it is recommended to contact local dive operators for information regarding available amenities before planning a trip.