AdvancedBoat entry

USS San Diego (ACR-6)

New York, United States

AOW suggested18–33 m depthBoat entry3mm wetsuit typical

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 23°C (74°F). Check the latest conditions and entry details before you go.

Marine model · graded 13h ago

0.9 mwaves — under a meter expected

Tap a factor for its source and model point · Forecast 23°C · seasonal avg 21°C

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

Best: Sat

Fri7:00–20:00

Sat7:00–20:00

Sun7:00–20:00

Mon7:00–20:00

Tue7:00–20:00

Wed7:00–19:00

Thu7:00–19:00

Favorable windowModerate window— no window

First light 6:01 · Sunrise 6:29 · Sunset 19:07

Source: Open-Meteo marine · model point 6.8 km from site · graded 13h ago

Forecast only — always assess conditions on site.

Forecast · NOAA tide model

Tide & slack timing

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.

Jan30%6°C1.7 m
Feb34%5°C1.7 m
Mar26%6°C1.8 m
Apr40%8°C1.5 m
May62%13°C1.3 m
Jun76%18°C1.1 m
Jul77%23°C1.1 m
Aug67%22°C1.3 m
Sep51%21°C1.5 m
Oct49%18°C1.6 m
Nov40%14°C1.4 m
Dec31%9°C1.7 m

July hastypically 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

Fills & rentals nearby

No dive shops mapped within 25 km. 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.

How deep is USS San Diego (ACR-6)?

USS San Diego (ACR-6) ranges from 18 to 33 metres deep (59–108 feet) — a deep dive at its limit. It is a saltwater site rated as advanced difficulty. Depths vary across the site, so plan your profile to your training and verify conditions locally.

Is USS San Diego (ACR-6) a shore dive or a boat dive?

USS San Diego (ACR-6) is a boat dive — access is by boat rather than from shore. The entry is recorded as a giant-stride entry. The entry area is recorded as exposed to surge. No facilities are recorded at the site, and cell service is recorded as good. Entry details and parking notes, where known, are listed in the access section of this page.

Can beginners dive USS San Diego (ACR-6)?

USS San Diego (ACR-6) is rated as advanced difficulty, which may not suit new divers. Listed depths run from 18 to 33 metres (59–108 feet). Access is by boat, with the entry recorded as a giant-stride entry. Consider your experience level, conditions, and local guidance before planning.

When is the best time to dive USS San Diego (ACR-6)?

Summer through early fall for warmest water and best visibility. Charter season roughly late spring through fall. Conditions vary, so check the latest reports and forecasts on the dive site page before your trip.

What will I see at USS San Diego (ACR-6)?

Divers at USS San Diego (ACR-6) in United States commonly report sightings of Tautog (blackfish), Atlantic cod, Lobster, Ling (red hake), and Black sea bass. Tautog (blackfish), Lobster, and Black sea bass are recorded as common sightings, while Atlantic cod is seasonal, while Ling (red hake) is reported only occasionally. Marine life varies by season and conditions—check the site page for recent diver observations and photos.

What hazards are recorded at USS San Diego (ACR-6)?

Depth (~100-110 ft), overturned hull and penetration risk, currents, boat traffic, cold water requiring exposure protection; entanglement from monofilament. Hazards and conditions change, so verify current local information before diving.

Reviews

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