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Deepwater - thebassbarn.com Reef-MANTANK

New Jersey, United States
AOW suggestedNew Jersey offshore reef/wreck diving28–35 m (93–115 ft) depthBoat entry5mm wetsuit typical

Boat dive — see Entry & access.

Deepwater - thebassbarn.com Reef-MANTANK at a glance

Deepwater - thebassbarn.com Reef-MANTANK is an advanced boat dive site in New Jersey, United States with depths of 28.3–35.1 m (93–115 ft). Typically most favorable Jun · from 3 years of archive data. Divers commonly see American lobster, Cunner, and Summer flounder (fluke). Recent reports put the water around 17°C (63°F). Check the latest conditions and entry details before you go.

Favorable window now· until 18:00 · sunset 17:07

Forecast for this hour · 16:00 · run 4 h ago
2.0 m (6.6 ft)waves — about two meters expected (waves — about seven feet expected)

Tap a factor for its source and model point · Forecast 17°C · seasonal avg 19°C ( · Forecast 63°F · seasonal avg 66°F)

Site hazards: New Jersey offshore reef/wreck diving

Read the full hazards ↓

Dive windows this week

Fri16:00–18:00 favorable

2.1 m waves · 19 kn wind (6.8 ft waves · 19 kn wind)

Sat7:00–18:00 favorable

1.5 m waves · 11 kn wind (4.8 ft waves · 11 kn wind)

Sun7:00–18:00 favorable

1.2 m waves · 6 kn wind (3.9 ft waves · 6 kn wind)

Mon7:00–18:00 favorable

1.0 m waves · 9 kn wind (3.4 ft waves · 9 kn wind)

Tue7:00–10:00 favorable, 10:00–18:00 moderate

1.2 m waves · 17 kn wind (3.9 ft waves · 17 kn wind)

Wed7:00–18:00 favorable

1.0 m waves · 12 kn wind (3.2 ft waves · 12 kn wind)

Thu7:00–17:00 favorable

0.7 m waves · 6 kn wind (2.4 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 5:47 · Sunrise 6:14 · Sunset 17:07 · some windows run past sunset

Source: Open-Meteo marine · model point 7.2 km from site · updated 23 Oct, 12:24 GMT-5

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Deepwater - thebassbarn.com Reef-MANTANK

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?

What Divers Say

Known for: American lobster, Cunner, Scup (porgy)
Best time: May through October is the prime season; late summer brings the warmest water and best visibility. Winter diving requires drysuit and experience.

Based on community reviews and site data. Conditions vary — always verify before diving.

Best months, historically

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

  1. January, 24% of days have historically been favorable, water has typically been 8°C (47°F), waves have typically been 1.9 m (6.2 ft), wind has typically been 23 knots
  2. February, 20% of days have historically been favorable, water has typically been 7°C (44°F), waves have typically been 1.9 m (6.1 ft), wind has typically been 21 knots
  3. March, 16% of days have historically been favorable, water has typically been 7°C (45°F), waves have typically been 2.0 m (6.5 ft), wind has typically been 22 knots
  4. April, 44% of days have historically been favorable, water has typically been 9°C (49°F), waves have typically been 1.7 m (5.4 ft), wind has typically been 20 knots
  5. May, 56% of days have historically been favorable, water has typically been 13°C (56°F), waves have typically been 1.5 m (4.8 ft), wind has typically been 17 knots
  6. June, 70% of days have historically been favorable, water has typically been 19°C (66°F), waves have typically been 1.3 m (4.1 ft), wind has typically been 16 knots, historically most favorable
  7. July, 66% of days have historically been favorable, water has typically been 24°C (75°F), waves have typically been 1.2 m (3.8 ft), wind has typically been 16 knots
  8. August, 55% of days have historically been favorable, water has typically been 23°C (74°F), waves have typically been 1.5 m (4.8 ft), wind has typically been 16 knots
  9. September, 40% of days have historically been favorable, water has typically been 22°C (71°F), waves have typically been 1.8 m (5.9 ft), wind has typically been 17 knots
  10. October, 39% of days have historically been favorable, water has typically been 19°C (66°F), waves have typically been 1.8 m (6.0 ft), wind has typically been 18 knots
  11. November, 36% of days have historically been favorable, water has typically been 16°C (60°F), waves have typically been 1.6 m (5.4 ft), wind has typically been 22 knots
  12. December, 28% of days have historically been favorable, water has typically been 11°C (53°F), waves have typically been 1.8 m (6.0 ft), wind has typically been 22 knots

June 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 seen at this site

Species noted at this site — not a promise of what you’ll encounter.

Species seen here

Rough labels: “Commonly seen” usually means two or more recorded sightings near this site in public dive logs (GBIF), “Occasionally seen” one; “Seasonal” and “Rarely seen” come from dive-guide research. Not a measured rate.

Fills & rentals nearby

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

Data updated June 2026

Site details

Artificial reef built from 224' Barge - "Mantank" NJDEP deployment record: Ship, material: 224' Barge - "Mantank", deployed 2002.

reefwreck

New Jersey offshore reef/wreck diving — cold water (near-freezing at depth in winter, mid-70s F at surface in summer) with thermoclines; limited visibility (often 5-20 ft); currents and surge; heavy fishing pressure means monofilament line and hanging gear on structure (cutting tool essential); boat traffic (SMB and dive flag required); structures may have sharp edges and unstable sections.

Reviews

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