Skip to content
Map of Wai'anae Artificial Reef - Mahi & Navy Barge
Add the first photo
AdvancedBoat entry

Wai'anae Artificial Reef - Mahi & Navy Barge

Hawaii, United States
Advanced suggested18–39 m depthBoat entryRash guard or 2mm shorty typical

Boat dive — see Entry & access.

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

Wai'anae Artificial Reef - Mahi & Navy Barge is a 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 nudibranchs, octopus, and pufferfish. Recent reports put the water around 27°C (81°F). Check the latest conditions and entry details before you go.

Marine model · graded 3h ago
1.5 mwaves — about a meter and a half 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: Tue
Sat—
Sun7:00–20:00
Mon7:00–20:00
Tue7:00–20:00
Wed7:00–20:00
Thu7:00–20:00
Fri7:00–20:00

Favorable windowModerate window— no window

First light 5:39 · Sunrise 6:03 · Sunset 19:15

Source: Open-Meteo marine · model point 4.6 km from site · graded 3h ago

Forecast only — always assess conditions on site.

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.

What Divers Say

Known for: pufferfish, reef fish, spotted eagle rays
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.

  1. Jan16%25°C2.2 m
  2. Feb40%25°C1.8 m
  3. Mar66%25°C1.6 m
  4. Apr77%25°C1.5 m
  5. May89%26°C1.3 m
  6. Jun99%26°C1.1 m
  7. Jul99%27°C1.1 m
  8. Aug92%27°C1.2 m
  9. Sep99%27°C1.2 m
  10. Oct78%27°C1.4 m
  11. Nov57%27°C1.6 m
  12. 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

  • nudibranchsOccasionally seen
  • octopusOccasionally seen
  • pufferfishCommonly seen
  • reef fishCommonly seen
  • spotted eagle raysCommonly seen
  • whitetip reef sharksOccasionally seen

Fills & rentals nearby

No dive shops mapped within 25 km. Know one? Add it to the map.

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.

Reviews

No reviews yet — this site is waiting for its first. Dived here? Your rating and a few lines help the next diver.

Spot something off?

Help keep this listing accurate for the next diver.