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Map of Dartmouth artificial reef
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Boat entry

Dartmouth artificial reef

Massachusetts, United States
Open Water suggested9 m (30 ft) depthBoat entry7mm or semi-dry + hood typical

Boat dive — see Entry & access.

Dartmouth artificial reef at a glance

Dartmouth artificial reef is a boat dive site in Massachusetts, United States with depths of up to 9.1 m (30 ft). Typically most favorable Jul · from 3 years of archive data. Recent reports put the water around 14°C (58°F). Check the latest conditions and entry details before you go.

Favorable window now· until 18:00 · sunset 17:47

Forecast for this hour · 17:00 · run 15 h ago
0.2 m (0.7 ft)waves — under half a meter expected (waves — under a foot expected)

Tap a factor for its source and model point · Forecast 14°C · seasonal avg 17°C ( · Forecast 58°F · seasonal avg 63°F)

Dive windows this week

Smallest waves: Sun
Sun8:00–18:00 favorable

0.2 m waves · 6 kn wind (0.7 ft waves · 6 kn wind)

Mon8:00–18:00 favorable

0.5 m waves · 15 kn wind (1.7 ft waves · 15 kn wind)

Tue8:00–18:00 favorable

0.6 m waves · 8 kn wind (1.9 ft waves · 8 kn wind)

Wed8:00–18:00 favorable

0.3 m waves · 4 kn wind (1.0 ft waves · 4 kn wind)

Thu8:00–18:00 favorable

0.6 m waves · 9 kn wind (2.0 ft waves · 9 kn wind)

Fri8:00–18:00 favorable

0.6 m waves · 5 kn wind (2.0 ft waves · 5 kn wind)

Sat8:00–18:00 favorable

0.3 m waves · 6 kn wind (1.0 ft waves · 6 kn wind)

Favorable windowModerate window— no window

Every forecast dive window each day, site-local time, from wave and wind forecasts. Numbers under each bar are daylight averages.

First light 6:39 · Sunrise 7:07 · Sunset 17:47 · some windows run past sunset

Source: Open-Meteo marine · model point 9.5 km from site · updated 25 Oct, 01:22 GMT-4

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Dartmouth artificial reef

Forecast · NOAA tide model

Tide & slack timing

Loading tide predictions

Recent diver reports

Dated firsthand observations from divers — not current conditions.

No diver reports for this site yet. — one dated observation helps every diver after you.

Dived here today — did the forecast match?

Best months, historically

What conditions have historically been typical at this site, month by month — not a forecast.

  1. January, 63% of days have historically been favorable, water has typically been 5°C (41°F), waves have typically been 1.5 m (4.8 ft), wind has typically been 14 knots
  2. February, 61% of days have historically been favorable, water has typically been 4°C (39°F), waves have typically been 1.4 m (4.6 ft), wind has typically been 14 knots
  3. March, 61% of days have historically been favorable, water has typically been 5°C (41°F), waves have typically been 1.4 m (4.7 ft), wind has typically been 15 knots
  4. April, 70% of days have historically been favorable, water has typically been 9°C (48°F), waves have typically been 1.3 m (4.2 ft), wind has typically been 13 knots
  5. May, 87% of days have historically been favorable, water has typically been 14°C (57°F), waves have typically been 1.0 m (3.3 ft), wind has typically been 13 knots
  6. June, 94% of days have historically been favorable, water has typically been 18°C (65°F), waves have typically been 1.0 m (3.1 ft), wind has typically been 11 knots
  7. July, 97% of days have historically been favorable, water has typically been 23°C (73°F), waves have typically been 0.9 m (3.1 ft), wind has typically been 11 knots, historically most favorable
  8. August, 89% of days have historically been favorable, water has typically been 23°C (73°F), waves have typically been 1.0 m (3.2 ft), wind has typically been 10 knots
  9. September, 92% of days have historically been favorable, water has typically been 21°C (69°F), waves have typically been 1.0 m (3.1 ft), wind has typically been 10 knots
  10. October, 82% of days have historically been favorable, water has typically been 17°C (63°F), waves have typically been 1.1 m (3.6 ft), wind has typically been 11 knots
  11. November, 68% of days have historically been favorable, water has typically been 12°C (54°F), waves have typically been 1.3 m (4.2 ft), wind has typically been 14 knots
  12. December, 63% of days have historically been favorable, water has typically been 8°C (46°F), waves have typically been 1.5 m (5.0 ft), wind has typically been 14 knots

July has typically 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.

Marine life recorded at this site

No recorded sightings data for this site yet. Species lists appear as GBIF records and diver reports accumulate.

Fills & rentals nearby

No dive shops mapped within 25 km (16 mi). Know one? Add it to the map.

Data updated July 2026

Site details

Artificial reef built from Concrete

reef

No hazards recorded for this site yet — that never means there are none. Ask a local operator before you dive.

Reviews

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