

Best for intermediate divers, 15-30m, boat entry, mild current.
Mewstone is an offshore reef located off Plymouth Sound, accessible only by boat. The site features depths ranging from 15 to 30 metres, with an average depth of 20 metres. Divers experience visibility between 5 and 18 metres and mild currents. Due to active boat traffic in the area, the use of a surface marker buoy is essential throughout the dive. The site is suited to intermediate divers. Water temperatures fluctuate between 10 and 16 degrees Celsius, making a drysuit or thick wetsuit with gloves recommended. Typical dive times are approximately 45 minutes.
50.30543, -4.10397
Boat traffic around Plymouth Sound is active year-round, so always deploy your SMB well before ascending and make sure your cover boat is briefed on your exit point. Water temperature sits between 10 and 16 degrees Celsius, so a drysuit or a thick wetsuit with gloves is worth packing even in summer.
A ten-minute RIB ride south from Plymouth Sound breakwater.
Recorded at this site
Depth
15-30m
Visibility
5-18m
Skill Level
Intermediate
Entry
Boat
Boat required
Water Temp
10-16°C
Current
Mild
Typical Dive
45 min
Best Time
May, Jun, Jul, Aug, Sep
Temperate marine life inhabits the reef across all seasons.
No, the site is rated for intermediate divers.
The site ranges from 15 to 30 metres, with an average depth of 20 metres.
Mewstone is an offshore reef that requires boat access.
Divers must remain aware of active boat traffic and potential strong currents in the area.
Diving at Mewstone Plymouth in Plymouth requires the following certifications: Open Water. Always dive within your training limits.
A drysuit recommended is recommended for diving at Mewstone Plymouth in Plymouth. Water temperatures range from 10°C to 16°C.
The best months to visit Mewstone Plymouth in Plymouth are May, June, July, August, and September. Conditions outside these months can still be good but are less predictable.
Mewstone Plymouth in Plymouth typically has mild currents that most divers can handle comfortably.
Visibility at Mewstone Plymouth in Plymouth typically ranges from 5 metres to 18 metres. Conditions vary with weather, tides, and seasons.