Hajen is an artificial reef located off Hesselø, Denmark, providing a shallow, sheltered environment suitable for beginner divers. As an artificial structure, it offers a controlled introduction to cold-water diving, though conditions such as depth and visibility are variable. Divers should be prepared for water temperatures ranging from 4C in winter to 19C in summer, necessitating appropriate thermal protection. Entry is via the shore, where divers should shuffle their feet to avoid sea urchins. Hazards include boat traffic, requiring the use of a surface marker buoy, as well as potential entanglement in kelp forests and strong currents. Always monitor local conditions before planning a dive.

Hundested Havn near Hesselø offers shallow marine diving at depths between 3 and 4 metres. The site is suitable for divers seeking calm, shallow conditions, with water temperatures ranging from 4C in winter to 19C in August. Divers frequently encounter wrasses, snails, and European green crabs among the local marine life. Less common sightings include giant jellyfish, common moon jellyfish, common sea stars, righteye flounder, shrimp, pipefish, rockpool prawns, sea squirts, and pout. Given the shallow depth, the site is accessible for beginners and provides opportunities for both diving and snorkelling in a sheltered harbour environment.

The Libra M/S is a shipwreck dive site located off the coast of Hesselø, Denmark. The wreck lies at a consistent depth of approximately 10 metres. Conditions at this site vary throughout the year, with water temperatures ranging from 4C in the winter months to 18C in August. The site is suitable for divers interested in wreck exploration within a temperate marine environment. The habitat supports a variety of temperate marine life, including various reef fish and invertebrates typical of the region. Divers should be prepared for variable visibility and conditions common to the Danish coastline.

Tisvildeleje Strand features a stone reef located approximately 100 metres from the shore. Divers typically enter from the beach near the parking area, navigating a sandy bottom before reaching the reef structure. The site reaches depths between 3 and 9 metres, with an average depth of 6 metres. Conditions include moderate currents and visibility ranging from 5 to 10 metres. The water temperature fluctuates significantly throughout the year, ranging from 4C to 18C. Divers should remain aware of boat traffic in the area. Facilities at the site include parking, toilets, and a cafe. Night diving is permitted, and the site is suitable for beginners.

Klint Havn at Hesselø is a shallow marine dive site characterised by seagrass beds. The site is suitable for beginners, with an average depth of 2 metres and a maximum depth of approximately 2.4 metres. Divers access the water directly from the shore. Conditions are generally mild, though water temperatures fluctuate significantly throughout the year, ranging from 4C in the winter months to 19C in August. Facilities available at the site include parking, toilets, and showers for diver convenience.

Malene Slotø is a wreck dive site located in Copenhagen and North Zealand, Denmark. The site is accessible only by boat and is suited for intermediate divers due to the moderate currents and the nature of the wreck. Depths at the site range from 16 to 24 metres, with an average depth of 20 metres. Divers should be aware of hazards including the depth, potential for entanglement, and the overhead environment presented by the wreck structure. The habitat supports a variety of temperate marine life, including various reef fish and invertebrates typical of the region.

Klintebjerget is a shore dive located off the coast of Hesselø, Denmark, featuring a combination of natural and artificial reef structures. Divers enter from the beach and navigate towards the reef, which lies approximately 500 metres offshore. The site is suitable for beginners, with depths ranging from 5 to 8 metres and an average depth of 6 metres. Conditions vary, with visibility typically between 3 and 10 metres and mild currents. Divers should be aware of boat traffic in the area and use a surface marker buoy at all times. Parking is available near the entry point.

Hesselø is a reef site located in the Kattegat, requiring boat access due to its position 30 kilometres from the shore. The site is suitable for beginners, offering a shallow depth range of 2 to 5 metres. Divers should be prepared for cold water conditions, which vary significantly throughout the year, ranging from 4°C in winter to 19°C in August. Currents at the site are generally mild. Given the exposed nature of the location and the cold water temperatures, appropriate thermal protection is essential for all dives.