

Best for intermediate divers, 3m, boat entry, moderate current.
Duck Island is a shallow reef site located five miles off the coast of New Hampshire within the Isles of Shoals. This marine site is suitable for intermediate divers and requires boat access due to its distance from the shore. The average depth is three metres, with conditions characterised by moderate currents and cold water temperatures ranging from 4C to 19C throughout the year. Divers should be aware of potential hazards including boat traffic, strong currents, and surf. Typical dives at this location last approximately 60 minutes.
43.00481, -70.60588
Duck Island is renowned for its seal encounters, which provide an unparalleled underwater experience.
Boat charters from Portsmouth or Rye Harbor are the primary means to reach these diving spots.
Recorded nearby, within 20km
Depth
3m
Skill Level
Intermediate
Entry
Boat
Boat required
Water Temp
4-19°C
Current
Moderate
Typical Dive
60 min
Best Time
May, Jun, Jul, Aug, Sep
There is no specific data available regarding the marine life present at this site.
No, this site is rated for intermediate skill levels.
The average depth at this site is three metres.
Duck Island requires boat access as it is located approximately 8047 metres from the shore.
Water temperatures fluctuate between 4C in February and 19C in August.
Diving at Duck Island in Portsmouth requires the following certifications: Open Water. Always dive within your training limits.
A drysuit recommended is recommended for diving at Duck Island in Portsmouth. Water temperatures range from 4°C to 19°C.
The best months to visit Duck Island in Portsmouth are May, June, July, August, and September. Conditions outside these months can still be good but are less predictable.