AdvancedBoat entry

Wai'anae Artificial Reef - Mahi & Navy Barge

Hawaii, United States

Advanced suggested18–39 m depthBoat entryRash guard or 2mm shorty typical

Wai'anae Artificial Reef - Mahi & Navy Barge at a glance

Wai'anae Artificial Reef - Mahi & Navy Barge is an advanced boat dive site in Hawaii, United States with depths of 18.3–38.7 m (60–127 ft). Typically most favorable Jul · from 3 years of archive data. Divers commonly see Reef fish, Whitetip reef shark, and Spotted eagle ray. Recent reports put the water around 27°C (81°F). Check the latest conditions and entry details before you go.

Marine model · graded 1h ago

1.2 mwaves — about a meter expected

Tap a factor for its source and model point · Forecast 27°C · seasonal avg 27°C

Site hazards: Depth, current, sharp/collapsed metal, overhead temptation, entanglement, boat pickup, and limited no-decompression time on deeper profiles.

Read the full hazards ↓

Dive windows this week

Best: Mon

Fri8:00–19:00

Sat7:00–19:00

Sun7:00–15:00

Mon7:00–19:00

Tue7:00–19:00

Wed7:00–19:00

Thu7:00–19:00

Favorable windowModerate window— no window

First light 5:56 · Sunrise 6:18 · Sunset 18:39

Source: Open-Meteo marine · model point 4.6 km from site · graded 1h 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: Reef fish, Spotted eagle ray, Pufferfish

Best time: Best in calm west-side seas; summer often brings clearer water, but operator conditions decide.

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.

Jan16%25°C2.2 m
Feb40%25°C1.8 m
Mar66%25°C1.6 m
Apr77%25°C1.5 m
May89%26°C1.3 m
Jun99%26°C1.1 m
Jul99%27°C1.1 m
Aug92%27°C1.2 m
Sep99%27°C1.2 m
Oct78%27°C1.4 m
Nov57%27°C1.6 m
Dec30%26°C2.0 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 July 2026

Site details

West Oahu wreck/artificial-reef dive around the Mahi minesweeper area off Waiʻanae. The wreck is known for eagle rays, reef fish, and coral-encrusted structure, but collapsed sections make penetration inappropriate. Treat the current PickADive record as a composite Mahi/Navy Barge reef-area record unless later split by precise official coordinates.

boatreefwreck

Depth, current, sharp/collapsed metal, overhead temptation, entanglement, boat pickup, and limited no-decompression time on deeper profiles.

How deep is Wai'anae Artificial Reef - Mahi & Navy Barge?

Wai'anae Artificial Reef - Mahi & Navy Barge ranges from 18.3 to 38.7 metres deep (60–127 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 Wai'anae Artificial Reef - Mahi & Navy Barge a shore dive or a boat dive?

Wai'anae Artificial Reef - Mahi & Navy Barge is a boat dive — access is by boat rather than from shore. The entry area is recorded as moderately 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 Wai'anae Artificial Reef - Mahi & Navy Barge?

Wai'anae Artificial Reef - Mahi & Navy Barge is rated as advanced difficulty, which may not suit new divers. Listed depths run from 18.3 to 38.7 metres (60–127 feet). Access is by boat. Consider your experience level, conditions, and local guidance before planning.

When is the best time to dive Wai'anae Artificial Reef - Mahi & Navy Barge?

Best in calm west-side seas; summer often brings clearer water, but operator conditions decide. Conditions vary, so check the latest reports and forecasts on the dive site page before your trip.

What will I see at Wai'anae Artificial Reef - Mahi & Navy Barge?

Divers at Wai'anae Artificial Reef - Mahi & Navy Barge in United States commonly report sightings of Reef fish, Whitetip reef shark, Spotted eagle ray, Pufferfish, and Nudibranch. Reef fish, Spotted eagle ray, and Pufferfish are recorded as common sightings, while Whitetip reef shark and Nudibranch are 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 Wai'anae Artificial Reef - Mahi & Navy Barge?

Depth, current, sharp/collapsed metal, overhead temptation, entanglement, boat pickup, and limited no-decompression time on deeper profiles. Hazards and conditions change, so verify current local information before diving.

Reviews

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