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Map of USS San Diego (ACR-6)
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USS San Diego (ACR-6)

New York, United States
AOW suggested18–33 m (59–108 ft) depthBoat entry7mm or semi-dry + hood typical

Boat dive — see Entry & access.

USS San Diego (ACR-6) at a glance

USS San Diego (ACR-6) is an advanced boat dive site in New York, United States with depths of 18–33 m (59–108 ft). Typically most favorable Jul · from 3 years of archive data. Divers commonly see Tautog (blackfish), Atlantic cod, and Lobster. Recent reports put the water around 16°C (61°F). Check the latest conditions and entry details before you go.

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

Forecast for this hour · 15:00 · run 13 h ago
0.7 m (2.4 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 61°F · seasonal avg 65°F)

Site hazards: Depth (~100-110 ft), overturned hull and penetration risk, currents, boat traffic, cold water requiring exposure protection; entanglement from monofilament.

Read the full hazards ↓

Dive windows this week

Smallest waves: Sat
Sun8:00–18:00 favorable

0.7 m waves · 5 kn wind (2.4 ft waves · 5 kn wind)

Mon8:00–18:00 favorable

0.8 m waves · 13 kn wind (2.5 ft waves · 13 kn wind)

Tue8:00–18:00 favorable

0.9 m waves · 10 kn wind (2.8 ft waves · 10 kn wind)

Wed8:00–18:00 favorable

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

Thu8:00–18:00 favorable

0.6 m waves · 10 kn wind (2.1 ft waves · 10 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 · 9 kn wind (1.6 ft waves · 9 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 6:46 · Sunrise 7:14 · Sunset 17:57 · some windows run past sunset

Source: Open-Meteo marine · model point 6.8 km from site · updated 25 Oct, 01:27 GMT-4

Forecast only — always assess conditions on site.

Compare this weekend’s windows near USS San Diego (ACR-6)

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: Tautog (blackfish), Lobster, Black sea bass
Best time: Summer through early fall for warmest water and best visibility.

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 June 2026

Site details

The wreck of the armored cruiser USS San Diego, torpedoed/mined by U-156 on 19 July 1918 off Fire Island and sunk in 28 minutes, the only major US warship lost in World War I. It lies inverted in about 110 feet of water off Cherry Grove, Fire Island, and is one of the most famous wreck dives in the Northeast. An advanced boat dive with penetration potential and significant artifacts.

boatwreck

Depth (~100-110 ft), overturned hull and penetration risk, currents, boat traffic, cold water requiring exposure protection; entanglement from monofilament.

Reviews

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