Vellerup at Hesselø is a shallow marine site featuring a combination of reef and seagrass habitats. Divers can expect an average depth of 3 metres, with recorded depths ranging between 2.7 and 3 metres. Access is via the shore. Conditions at the site are variable, with visibility reaching up to 10 metres and currents generally described as mild. Water temperatures fluctuate significantly throughout the year, ranging from 4C in the winter months to 19C in August. This site is suitable for beginners due to its shallow nature and manageable conditions.

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.

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.

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.

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.

Munkholmbroen offers shallow shore dives within Isefjorden, featuring an artificial reef environment created by the bridge piers. Divers can explore the area north, south, or directly under the bridge, where the topography varies from flat to hilly terrain. The site reaches depths between 2 and 7 metres, with a 30-metre shallow stretch from the beach before the drop-off. Visibility typically ranges from 3 to 10 metres. Due to the location, divers should remain vigilant regarding boat traffic and potential entanglement hazards. Parking is available near the entry point, making this a convenient site for beginners.

Tandstumpen is an artificial reef located 100 metres from the shore of Hesselø, Denmark. This shallow site is suitable for beginners, with an average depth of 3 metres and a maximum depth of approximately 3 metres. Divers can expect mild currents and visibility ranging from 2 to 7 metres. The water temperature fluctuates significantly throughout the year, from 4C in winter to 19C in August. The site supports a variety of temperate marine life typical of the region, including various reef fish and invertebrates. Divers should remain aware of potential boat traffic and entanglement hazards in the area. Typical dives at this location last around 30 minutes.

Anders Martin is a wreck dive located off Hesselø, Denmark, resting at depths between 16 and 23 metres. Divers can expect visibility ranging from 10 to 15 metres, providing a clear view of the structure. The site is accessible only by boat and is suited for intermediate divers due to the need for active current management. Water temperatures are cold, fluctuating between 4 and 14 degrees Celsius, necessitating appropriate exposure protection. The habitat supports a variety of temperate marine life, including various fish and invertebrates typical of the region. Divers should monitor their depth closely throughout the 45-minute average dive time to manage nitrogen levels.