Boat dive — see Entry & access.
Harwich reef is a boat dive site in Massachusetts, United States with depths of up to 10.1 m (33 ft). Typically most favorable Jun · from 3 years of archive data. Recent reports put the water around 23°C (73°F). Check the latest conditions and entry details before you go.
Tap a factor for its source and model point · Forecast 23°C · seasonal avg 20°C
Dive windows this week
Best: SatFavorable windowModerate window— no window
First light 5:48 · Sunrise 6:16 · Sunset 18:56
Source: Open-Meteo marine · model point 4.5 km from site · graded 2h ago
Forecast only — always assess conditions on site.
Forecast · NOAA tide model
Loading tide predictions
Dated firsthand observations from divers — not current conditions.
No diver reports for this site yet. — one dated observation helps every diver after you.
What conditions have historically been typical at this site, month by month — not a forecast.
June hastypically had the largest share of favorable days here. Conditions vary year to year — this is historical context, not a forecast.
Based on 3 years of archive data. Bar height shows the share of days each month whose conditions have historically scored favorably.
No recorded sightings data for this site yet. Species lists appear as GBIF records and diver reports accumulate.
No dive shops mapped within 25 km. Know one? Add it to the map.
Data updated July 2026
Artificial reef built from Concrete
No hazards recorded for this site yet — that never means there are none. Ask a local operator before you dive.
Harwich reef reaches a maximum depth of 10.1 metres (33 feet) — a shallow dive. It is a saltwater site. Depths vary across the site, so plan your profile to your training and verify conditions locally.
Harwich reef is a boat dive — access is by boat rather than from shore. No facilities are recorded at the site, and cell service is recorded as good. Entry details and parking notes, where known, are listed in the access section of this page.
No reviews yet — this site is waiting for its first. Dived here? Your rating and a few lines help the next diver.
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