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Map of 10 - YC 725 A
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IntermediateBoat entry

10 - YC 725 A

Delaware, United States
Open Water suggestedFishing line and hooks14–20 m (46–66 ft) depthBoat entry7mm or semi-dry + hood typical

Boat dive — see Entry & access.

10 - YC 725 A at a glance

10 - YC 725 A is an intermediate boat dive site in Delaware, United States with depths of 14–20 m (46–66 ft). Typically most favorable Jul · from 3 years of archive data. Divers commonly see Scup, Black sea bass, and Blue mussel. Recent reports put the water around 17°C (62°F). Check the latest conditions and entry details before you go.

Favorable window now· until 19:00 · sunset 18:06

Forecast for this hour · 12:00 · run 22 h ago
1.0 m (3.1 ft)waves — about a meter expected (waves — about three feet expected)

Tap a factor for its source and model point · Forecast 17°C · seasonal avg 19°C ( · Forecast 62°F · seasonal avg 67°F)

Site hazards: Fishing line and hooks · Sharp mussel-encrusted steel · Variable visibility

All 4 hazards ↓

Dive windows this week

Mon8:00–19:00 favorable

1.0 m waves · 6 kn wind (3.1 ft waves · 6 kn wind)

Tue8:00–19:00 favorable

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

Wed8:00–19:00 favorable

0.9 m waves · 10 kn wind (3.0 ft waves · 10 kn wind)

Thu8:00–19:00 favorable

0.6 m waves · 5 kn wind (2.0 ft waves · 5 kn wind)

Fri8:00–19:00 favorable

0.5 m waves · 8 kn wind (1.7 ft waves · 8 kn wind)

Sat8:00–19:00 favorable

0.5 m waves · 5 kn wind (1.6 ft waves · 5 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 6:53 · Sunrise 7:20 · Sunset 18:06 · some windows run past sunset

Source: Open-Meteo marine · model point 6.0 km from site · updated 25 Oct, 13:17 GMT-4

Forecast only — always assess conditions on site.

Compare this weekend’s windows near 10 - YC 725 A

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: Scup, Black sea bass, Blue mussel
Best time: Summer through early fall.

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, 71% of days have historically been favorable, water has typically been 6°C (42°F), waves have typically been 1.3 m (4.3 ft), wind has typically been 14 knots
  2. February, 67% of days have historically been favorable, water has typically been 6°C (42°F), waves have typically been 1.4 m (4.5 ft), wind has typically been 13 knots
  3. March, 63% of days have historically been favorable, water has typically been 8°C (47°F), waves have typically been 1.5 m (4.9 ft), wind has typically been 15 knots
  4. April, 77% of days have historically been favorable, water has typically been 12°C (54°F), waves have typically been 1.3 m (4.3 ft), wind has typically been 14 knots
  5. May, 85% of days have historically been favorable, water has typically been 17°C (62°F), waves have typically been 1.2 m (3.8 ft), wind has typically been 12 knots
  6. June, 92% of days have historically been favorable, water has typically been 22°C (71°F), waves have typically been 1.0 m (3.3 ft), wind has typically been 11 knots
  7. July, 98% of days have historically been favorable, water has typically been 25°C (77°F), waves have typically been 0.9 m (3.0 ft), wind has typically been 10 knots, historically most favorable
  8. August, 84% of days have historically been favorable, water has typically been 24°C (76°F), waves have typically been 1.2 m (3.9 ft), wind has typically been 11 knots
  9. September, 63% of days have historically been favorable, water has typically been 23°C (74°F), waves have typically been 1.5 m (5.0 ft), wind has typically been 12 knots
  10. October, 69% of days have historically been favorable, water has typically been 19°C (67°F), waves have typically been 1.5 m (4.8 ft), wind has typically been 12 knots
  11. November, 74% of days have historically been favorable, water has typically been 14°C (58°F), waves have typically been 1.2 m (3.9 ft), wind has typically been 12 knots
  12. December, 70% of days have historically been favorable, water has typically been 8°C (47°F), waves have typically been 1.3 m (4.4 ft), wind has typically been 13 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 June 2026

Site details

YC-725 was a 251-ft, 2,344-ton steel vessel built in 1918 at Globe Shipbuilding in Superior, Wisconsin (originally the Contoocook, later Elda) and finished her career as a U.S. Navy open lighter barge. She was sunk in 1946 and lies on what is now Delaware Artificial Reef Site #10 in about 60 ft of water, 5.5 nautical miles from Indian River Inlet, where her mussel-covered hull holds sea bass and tautog.

boatreefwreck

Fishing line and hooks

Sharp mussel-encrusted steel

Variable visibility

Deteriorating hull structure

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