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ExpertBoat entry

Twelve Mile Reef

New York, United States
Deep (123-143 ft)38–44 m depthBoat entry3mm wetsuit typical

Boat dive — see Entry & access.

Twelve Mile Reef at a glance

Twelve Mile Reef is a expert boat dive site in New York, United States with depths of 37.5–43.6 m (123–143 ft). Typically most favorable Jul · from 3 years of archive data. Divers commonly see Black sea bass, Tautog (blackfish), and Scup (porgy). Recent reports put the water around 22°C (72°F). Check the latest conditions and entry details before you go.

Marine model · graded 4h ago
1.1 mwaves — about a meter expected

Tap a factor for its source and model point · Forecast 22°C · seasonal avg 23°C

Site hazards: Deep (123-143 ft)

Read the full hazards ↓

Dive windows this week

Best: Mon
Sun5:00–20:00
Mon5:00–20:00
Tue5:00–20:00
Wed5:00–20:00
Thu5:00–20:00
Fri5:00–20:00
Sat5:00–20:00

Favorable windowModerate window— no window

First light 4:10 · Sunrise 4:41 · Sunset 19:11

Source: Open-Meteo marine · model point 2.3 km from site · graded 4h ago

Forecast only — always assess conditions on site.

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.

What Divers Say

Known for: Black sea bass, Tautog (blackfish), Scup (porgy)
Best time: Summer (warmest water, best visibility) on calm offshore days.

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. Jan23%8°C1.9 m
  2. Feb21%7°C1.9 m
  3. Mar12%6°C2.0 m
  4. Apr37%8°C1.7 m
  5. May55%12°C1.4 m
  6. Jun68%17°C1.2 m
  7. Jul73%23°C1.1 m
  8. Aug60%22°C1.4 m
  9. Sep43%21°C1.6 m
  10. Oct34%18°C1.7 m
  11. Nov32%15°C1.7 m
  12. Dec26%11°C1.9 m

July 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.

Marine life seen at this site

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

Species seen here

  • Black sea bassCommonly seen
  • Tautog (blackfish)Commonly seen
  • Scup (porgy)Commonly seen
  • American lobsterOccasionally seen
  • CunnerCommonly seen

Fills & rentals nearby

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

Site details

Twelve Mile Reef (the '12 Mile Reef') is an 850-acre NYSDEC artificial reef in the Atlantic Ocean about 12 nautical miles from Moriches and Shinnecock Inlets, in 123-143 ft of water. It holds two vessels, 16 steel center-beam railcars, rock and ECOncrete and is referenced by Long Island wreck divers, but its depth places it at or beyond recreational limits—an expert/technical boat dive. Black sea bass, tautog and scup populate the structure; visibility is variable.

boatreefwreck

Deep (123-143 ft) — at/beyond recreational limits, requiring deco/technical planning; 12 nm offshore in open Atlantic with current and swell; cold/dark at depth; fishing tackle on wrecks.

Reviews

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