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Map of Smithtown Reef
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IntermediateBoat entry

Smithtown Reef

New York, United States
Open Water suggested9–12 m depthBoat entry3mm wetsuit typical

Boat dive — see Entry & access.

Smithtown Reef at a glance

Smithtown Reef is a intermediate boat dive site in New York, United States with depths of 9.1–12.2 m (30–40 ft). Typically most favorable May–Jul · from 3 years of archive data. Divers commonly see Tautog (blackfish), Black sea bass, and Scup (porgy). Recent reports put the water around 23°C (73°F). Check the latest conditions and entry details before you go.

Marine model · graded 3h ago
0.1 mwaves — under half a meter expected

Tap a factor for its source and model point · Forecast 23°C · seasonal avg 24°C

Site hazards: Long Island Sound current and boat traffic; reduced visibility on tides; fishing tackle on structure.

Read the full hazards ↓

Dive windows this week

Best: Sun
Sun6:00–21:00
Mon6:00–21:00
Tue6:00–21:00
Wed6:00–21:00
Thu6:00–21:00
Fri6:00–21:00
Sat6:00–21:00

Favorable windowModerate window— no window

First light 5:12 · Sunrise 5:43 · Sunset 20:15

Source: Open-Meteo marine · model point 9.4 km from site · graded 3h 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: Tautog (blackfish), Black sea bass, Scup (porgy)
Best time: Summer and fall on slack tide.

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. Jan94%5°C0.6 m
  2. Feb95%4°C0.5 m
  3. Mar91%5°C0.6 m
  4. Apr96%8°C0.5 m
  5. May100%13°C0.4 m
  6. Jun100%18°C0.3 m
  7. Jul100%24°C0.2 m
  8. Aug99%23°C0.3 m
  9. Sep98%22°C0.4 m
  10. Oct96%18°C0.5 m
  11. Nov93%14°C0.6 m
  12. Dec92%8°C0.6 m

May, June, and July havetypically 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

  • Tautog (blackfish)Commonly seen
  • Black sea bassCommonly seen
  • Scup (porgy)Commonly seen
  • Summer flounder (fluke)Occasionally seen
  • American lobsterOccasionally seen

Fills & rentals nearby

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

Site details

Smithtown Reef is a 31-acre NYSDEC artificial reef in Long Island Sound about 1.6 nautical miles northwest of the Stony Brook Harbor entrance, in 30-40 ft of water. Built from two vessels, six barges, steel pipes and concrete-filled steel cylinders, it offers good relief for tautog, black sea bass and scup. Visibility is typically 10-20 ft and tide-dependent—an intermediate Sound boat dive.

boatreefwreck

Long Island Sound current and boat traffic; reduced visibility on tides; fishing tackle on structure.

Reviews

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