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Boat entry

Yellowbar Reef

New York, United States
Open Water suggested8–12 m (25–40 ft) depthBoat entry7mm or semi-dry + hood typical

Boat dive — see Entry & access.

Yellowbar Reef at a glance

Yellowbar Reef is a boat dive site in New York, United States with depths of 7.6–12.2 m (25–40 ft). Typically most favorable Jul · from 3 years of archive data. Divers commonly see Cunner, Tautog (blackfish), and Black sea bass. Recent reports put the water around 16°C (60°F). Check the latest conditions and entry details before you go.

Favorable window now· until 18:00 · sunset 17:57

Forecast for this hour · 11:00 · run 9 h ago
0.7 m (2.3 ft)waves — under a meter expected (waves — about two feet expected)

Tap a factor for its source and model point · Forecast 16°C · seasonal avg 18°C ( · Forecast 60°F · seasonal avg 65°F)

Site hazards: Boat traffic in Great South Bay near the bridge; reduced visibility from sediment/tide; fishing tackle on structure.

Read the full hazards ↓

Dive windows this week

Mon8:00–18:00 favorable

0.7 m waves · 12 kn wind (2.3 ft waves · 12 kn wind)

Tue8:00–18:00 favorable

0.8 m waves · 11 kn wind (2.6 ft waves · 11 kn wind)

Wed8:00–18:00 favorable

0.6 m waves · 3 kn wind (2.1 ft waves · 3 kn wind)

Thu8:00–18:00 favorable

0.5 m waves · 8 kn wind (1.6 ft waves · 8 kn wind)

Fri8:00–18:00 favorable

0.6 m waves · 9 kn wind (1.8 ft waves · 9 kn wind)

Sat8:00–18:00 favorable

0.5 m waves · 6 kn wind (1.6 ft waves · 6 kn wind)

Sun8:00–18:00 favorable

0.8 m waves · 7 kn wind (2.5 ft waves · 7 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 6:48 · Sunrise 7:16 · Sunset 17:57 · some windows run past sunset

Source: Open-Meteo marine · model point 2.9 km from site · updated 26 Oct, 01:24 GMT-4

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Yellowbar 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?

What Divers Say

Known for: Cunner, Tautog (blackfish), Black sea bass
Best time: Summer on a slack/incoming tide for best clarity.

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, 30% of days have historically been favorable, water has typically been 6°C (44°F), waves have typically been 1.7 m (5.5 ft), wind has typically been 22 knots
  2. February, 34% of days have historically been favorable, water has typically been 5°C (41°F), waves have typically been 1.7 m (5.4 ft), wind has typically been 21 knots
  3. March, 26% of days have historically been favorable, water has typically been 6°C (42°F), waves have typically been 1.8 m (5.8 ft), wind has typically been 21 knots
  4. April, 40% of days have historically been favorable, water has typically been 8°C (47°F), waves have typically been 1.5 m (5.1 ft), wind has typically been 19 knots
  5. May, 62% of days have historically been favorable, water has typically been 13°C (55°F), waves have typically been 1.3 m (4.2 ft), wind has typically been 17 knots
  6. June, 76% of days have historically been favorable, water has typically been 18°C (64°F), waves have typically been 1.2 m (3.8 ft), wind has typically been 16 knots
  7. July, 77% of days have historically been favorable, water has typically been 23°C (73°F), waves have typically been 1.1 m (3.5 ft), wind has typically been 15 knots, historically most favorable
  8. August, 67% of days have historically been favorable, water has typically been 22°C (72°F), waves have typically been 1.3 m (4.2 ft), wind has typically been 16 knots
  9. September, 51% of days have historically been favorable, water has typically been 21°C (70°F), waves have typically been 1.5 m (5.0 ft), wind has typically been 17 knots
  10. October, 49% of days have historically been favorable, water has typically been 18°C (65°F), waves have typically been 1.6 m (5.1 ft), wind has typically been 18 knots
  11. November, 40% of days have historically been favorable, water has typically been 14°C (57°F), waves have typically been 1.5 m (4.8 ft), wind has typically been 21 knots
  12. December, 31% of days have historically been favorable, water has typically been 9°C (49°F), waves have typically been 1.7 m (5.6 ft), wind has typically been 22 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 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 July 2026

Site details

Yellowbar (Fisherman) Reef is a small 7-acre NYSDEC artificial reef in Great South Bay, about 900 yards east of the Robert Moses Fixed Bridge, in 25-40 ft of water. Built from three vessels, a barge, pontoons, 100 concrete Reef Ball units, concrete forms and pipes, it is a sheltered, shallow bay reef good for newer divers. Black sea bass, tautog, scup and flounder use the structure; visibility is limited and tide-dependent.

boatreefwreck

Boat traffic in Great South Bay near the bridge; reduced visibility from sediment/tide; fishing tackle on structure.

Reviews

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