Longstone is a marine dive site located off the Northumberland Coast, featuring a combination of reef and wreck topography. The site maintains a consistent depth of 12 metres. Access is strictly by boat, as the site is situated approximately 8 kilometres from the shore. Divers should be prepared for challenging conditions, including strong currents, surge, and variable visibility ranging from 5 to 15 metres. Water temperatures are cold, fluctuating between 7C and 15C throughout the year, making a drysuit essential for comfort. Due to the presence of boat traffic and strong currents, this site requires careful planning and is best suited for those experienced with cold-water environments.

Crumstone is a reef site located 500 metres off the Northumberland Coast. The site features a consistent depth of approximately 8 metres, making it suitable for beginner divers. Access is exclusively by boat. Divers should be prepared for cold water temperatures ranging from 7C to 15C and visibility typically between 5 and 10 metres. The site is subject to moderate currents and potential surf conditions. Typical dive times at this location are around 40 minutes. Facilities including parking, toilets, and a cafe are available nearby on the coast.

The Farne Islands feature a diverse underwater landscape comprising reefs, walls, kelp forests, and wrecks. Located off the Northumberland Coast, this site offers depths ranging from 10 to 35 metres, with an average depth of 15 metres. Access is strictly by boat charter. Divers should be prepared for cold water temperatures between 7 and 13 degrees Celsius and moderate currents that can fluctuate. Visibility typically spans 5 to 15 metres. Due to the depth and potential for currents, divers must monitor their computers and buoyancy, particularly when navigating near overhead environments. A drysuit is recommended for these conditions.

St Andre is a wreck dive located off the Northumberland Coast, resting at depths between 15 and 25 metres. Accessible only by boat, the site features mild currents, making it suitable for divers comfortable with wreck exploration. Visibility at the site is variable, ranging from 10 to 30 metres. Water temperatures are cool, fluctuating between 7 and 13 degrees Celsius throughout the year, necessitating the use of a drysuit. Divers must remain alert for boat traffic during entry and exit procedures. Due to the depth of the wreck, it is essential to monitor ascents closely and ensure surface markers are visible at all times.

Blue Caps is a varied marine site featuring a combination of reef, wall, and cave topography. Located 1609 metres from the shore, the site ranges in depth from 5 to 20 metres with an average of 12 metres. Divers should expect moderate currents and visibility between 5 and 10 metres. Boat access is required to reach the site, and surface conditions may include surf. Due to water temperatures ranging from 7 to 14 degrees Celsius, a drysuit with an appropriate undersuit is essential. Divers should exercise caution around the submerged wreck structure to avoid injury or entanglement. Tidal windows should be confirmed with a skipper prior to departure.

The Hopper is a reef and wall site located off the Northumberland Coast. The topography drops from 6 metres to a maximum depth of 40 metres, with an average depth of 13 metres. Divers encounter strong currents, making this site suitable for intermediate divers who can manage drift conditions. Visibility typically ranges between 10 and 30 metres. Marine life recorded at the site includes very common sightings of grey seals, alongside common snails. Less frequently, divers may observe common lobsters, wrasses, sea stars, crabs, rock crabs, sea squirts, and dead man's fingers. Boat access is required, and drysuits are necessary due to water temperatures ranging from 7C to 13C.

The Hopper is a reef and artificial reef site located off the Northumberland Coast. This marine location is accessed by boat, situated 4000 metres from the shore. The site features depths ranging from 6 to 25 metres, with an average depth of 13 metres. Conditions are variable, with strong currents and visibility between 5 and 20 metres. Water temperatures are cold, ranging from 7C to 15C throughout the year, making drysuits recommended for participants. The site is suitable for intermediate snorkellers, with a typical activity duration of 40 minutes. Hazards include cold water, sea urchins, strong currents, and surf.

Big Harcar is a reef dive located off the Northumberland Coast. The site features depths between 10 and 15 metres and offers visibility ranging from 10 to 30 metres. Divers should expect moderate currents, requiring careful timing of the dive. Given the water temperatures, which fluctuate between 7 and 14 degrees Celsius throughout the year, a drysuit is strongly recommended. Access to this site is exclusively by boat. While the site is suitable for newly qualified divers, it is advisable to seek local guidance regarding boat charter availability and facilities before planning a trip.