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Map of YO-257 & San Pedro Wrecks
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YO-257 & San Pedro Wrecks

Hawaii, United States
AOW suggested18–31 m (60–100 ft) depthBoat entry3mm wetsuit typical

Boat dive — see Entry & access.

YO-257 & San Pedro Wrecks at a glance

YO-257 & San Pedro Wrecks is an advanced boat dive site in Hawaii, United States with depths of 18.3–30.5 m (60–100 ft). Typically most favorable Oct · from 3 years of archive data. Divers commonly see Moray eel (various species), Great barracuda, and Reef fish. Recent reports put the water around 27°C (80°F). Check the latest conditions and entry details before you go.

Favorable window now· until 18:00 · sunset 17:58

Forecast for this hour · 10:00 · run 3 h ago
1.2 m (3.9 ft)waves — about a meter expected (waves — about four feet expected)

Tap a factor for its source and model point · Forecast 27°C · seasonal avg 27°C ( · Forecast 80°F · seasonal avg 81°F)

Site hazards: Depth, current at surface, sharp wreck metal, entanglement, overhead/penetration risk, submarine/tour operations, boat traffic, and short no-decompression margin if both wrecks are explored deeply.

Read the full hazards ↓

Dive windows this week

Mon8:00–18:00 favorable

1.2 m waves · 8 kn wind (3.9 ft waves · 8 kn wind)

Tue7:00–18:00 favorable

1.3 m waves · 10 kn wind (4.3 ft waves · 10 kn wind)

Wed7:00–8:00 moderate, 10:00–15:00 moderate, 15:00–18:00 favorable

1.6 m waves · 19 kn wind (5.1 ft waves · 19 kn wind)

Thu7:00–18:00 favorable

1.6 m waves · 16 kn wind (5.3 ft waves · 16 kn wind)

Fri7:00–18:00 favorable

1.6 m waves · 14 kn wind (5.2 ft waves · 14 kn wind)

Sat7:00–18:00 favorable

1.3 m waves · 15 kn wind (4.4 ft waves · 15 kn wind)

Sun7:00–18:00 favorable

1.3 m waves · 4 kn wind (4.1 ft waves · 4 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 6:08 · Sunrise 6:31 · Sunset 17:58 · some windows run past sunset

Source: Open-Meteo marine · model point 4.5 km from site · updated 26 Oct, 07:29 GMT-10

Forecast only — always assess conditions on site.

Compare this weekend’s windows near YO-257 & San Pedro 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: Moray eel (various species), Reef fish, Green sea turtle
Best time: Diveable year-round with operator-selected conditions; May-September often offers peak visibility/calm seas.

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, 9% of days have historically been favorable, water has typically been 25°C (78°F), waves have typically been 2.2 m (7.2 ft), wind has typically been 16 knots
  2. February, 13% of days have historically been favorable, water has typically been 25°C (77°F), waves have typically been 2.1 m (6.8 ft), wind has typically been 17 knots
  3. March, 30% of days have historically been favorable, water has typically been 25°C (77°F), waves have typically been 1.9 m (6.3 ft), wind has typically been 18 knots
  4. April, 26% of days have historically been favorable, water has typically been 25°C (77°F), waves have typically been 1.8 m (5.9 ft), wind has typically been 17 knots
  5. May, 31% of days have historically been favorable, water has typically been 26°C (78°F), waves have typically been 1.7 m (5.6 ft), wind has typically been 18 knots
  6. June, 21% of days have historically been favorable, water has typically been 26°C (79°F), waves have typically been 1.7 m (5.5 ft), wind has typically been 20 knots
  7. July, 13% of days have historically been favorable, water has typically been 27°C (80°F), waves have typically been 1.7 m (5.4 ft), wind has typically been 21 knots
  8. August, 14% of days have historically been favorable, water has typically been 27°C (81°F), waves have typically been 1.7 m (5.6 ft), wind has typically been 20 knots
  9. September, 26% of days have historically been favorable, water has typically been 27°C (81°F), waves have typically been 1.5 m (5.1 ft), wind has typically been 18 knots
  10. October, 37% of days have historically been favorable, water has typically been 27°C (81°F), waves have typically been 1.6 m (5.2 ft), wind has typically been 16 knots, historically most favorable
  11. November, 18% of days have historically been favorable, water has typically been 26°C (79°F), waves have typically been 1.9 m (6.3 ft), wind has typically been 19 knots
  12. December, 11% of days have historically been favorable, water has typically been 26°C (79°F), waves have typically been 2.1 m (6.7 ft), wind has typically been 16 knots

October 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.

The underwater calendar

When these animals are most recorded around Hawaiʻi — from open sighting data, not a promise.

Watch the whole year animate on the Migrations map

Fills & rentals nearby

Facts from OpenStreetMap, corrected by the community — listed by distance only. Details change; confirm with the shop.

Shop facts come from OpenStreetMap and community corrections, shown nearest first. PickADive lists facts and contacts only — no listing is sponsored or ranked.

Data updated July 2026

Site details

Advanced boat dive on two adjacent artificial-reef wrecks off Waikiki: the larger Navy yard oiler YO-257 and the smaller San Pedro fishing vessel. The pair is often dived as a dual-wreck route, with turtles, reef sharks, eagle rays, trevally/amberjacks, and a visible tourist submarine route. Penetration is possible only for trained divers and should remain guide- and conditions-dependent.

boatwreck

Depth, current at surface, sharp wreck metal, entanglement, overhead/penetration risk, submarine/tour operations, boat traffic, and short no-decompression margin if both wrecks are explored deeply.

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