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Map of Great Eastern Reef/Twin Wrecks
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Great Eastern Reef/Twin Wrecks

Maryland, United States
AOW suggestedDepth (95-110 ft)29–34 m (95–112 ft) depthBoat entry5mm wetsuit typical

Boat dive — see Entry & access.

Great Eastern Reef/Twin Wrecks at a glance

Great Eastern Reef/Twin Wrecks is an advanced boat dive site in Maryland, United States with depths of 29–34 m (95–112 ft). Typically most favorable Jun · from 3 years of archive data. Divers commonly see Amberjack, American lobster, and Atlantic spadefish. Recent reports put the water around 18°C (64°F). Check the latest conditions and entry details before you go.

Favorable window now· until 18:00 · sunset 17:06

Forecast for this hour · 12:00 · run 23 h ago
1.2 m (4.1 ft)waves — about a meter expected (waves — about four feet expected)

Tap a factor for its source and model point · Forecast 18°C · seasonal avg 20°C ( · Forecast 64°F · seasonal avg 67°F)

Site hazards: Depth (95-110 ft) · Offshore currents · Monofilament and fishing gear on wreckage

All 5 hazards ↓

Dive windows this week

Smallest waves: Sat
Mon7:00–18:00 favorable

1.2 m waves · 8 kn wind (4.1 ft waves · 8 kn wind)

Tue7:00–18:00 favorable

1.2 m waves · 15 kn wind (3.9 ft waves · 15 kn wind)

Wed7:00–18:00 favorable

1.1 m waves · 11 kn wind (3.5 ft waves · 11 kn wind)

Thu7:00–18:00 favorable

0.8 m waves · 3 kn wind (2.5 ft waves · 3 kn wind)

Fri7:00–18:00 favorable

0.7 m waves · 7 kn wind (2.3 ft waves · 7 kn wind)

Sat7:00–18:00 favorable

0.6 m waves · 4 kn wind (2.0 ft waves · 4 kn wind)

SunNot in the forecast yet

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 5:51 · Sunrise 6:18 · Sunset 17:06 · some windows run past sunset

Source: Open-Meteo marine · model point 2.0 km from site · updated 25 Oct, 12:22 GMT-5

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Great Eastern Reef/Twin Wrecks

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, Tautog, Black sea bass
Best time: Summer and early fall when offshore seas allow the 20 nm run and visibility is best.

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, 25% of days have historically been favorable, water has typically been 9°C (49°F), waves have typically been 1.9 m (6.3 ft), wind has typically been 23 knots
  2. February, 18% 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 21 knots
  3. March, 18% of days have historically been favorable, water has typically been 8°C (46°F), waves have typically been 2.0 m (6.6 ft), wind has typically been 22 knots
  4. April, 33% of days have historically been favorable, water has typically been 10°C (51°F), waves have typically been 1.7 m (5.6 ft), wind has typically been 20 knots
  5. May, 51% of days have historically been favorable, water has typically been 14°C (58°F), waves have typically been 1.5 m (4.9 ft), wind has typically been 17 knots
  6. June, 66% of days have historically been favorable, water has typically been 20°C (68°F), waves have typically been 1.3 m (4.2 ft), wind has typically been 16 knots, historically most favorable
  7. July, 65% of days have historically been favorable, water has typically been 25°C (77°F), waves have typically been 1.2 m (3.9 ft), wind has typically been 15 knots
  8. August, 55% of days have historically been favorable, water has typically been 24°C (76°F), waves have typically been 1.5 m (5.0 ft), wind has typically been 16 knots
  9. September, 39% of days have historically been favorable, water has typically been 22°C (72°F), waves have typically been 1.9 m (6.3 ft), wind has typically been 17 knots
  10. October, 37% of days have historically been favorable, water has typically been 20°C (67°F), waves have typically been 1.9 m (6.3 ft), wind has typically been 18 knots
  11. November, 37% of days have historically been favorable, water has typically been 16°C (62°F), waves have typically been 1.7 m (5.5 ft), wind has typically been 21 knots
  12. December, 27% of days have historically been favorable, water has typically been 13°C (55°F), waves have typically been 1.9 m (6.3 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

A 1,000-plus acre Maryland artificial reef 20 nautical miles east of the Ocean City Inlet in 95-110 ft of water, centered on the historic 'Twin Wrecks': the 322-ft steel cargo ship Saetia (a WWI-era loss) and the upside-down bow section of the tanker Oklahoma, which broke in two in 1914. Cable piles and reef material around the wrecks hold plentiful lobster, and the site draws sea bass, tautog and pelagics in season.

boatreefwreck

Depth (95-110 ft)

Offshore currents

Monofilament and fishing gear on wreckage

Cold water below the thermocline

Long boat ride / weather exposure

Reviews

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