YO-257 - Hawaii
The YO-257 is our go-to wreck dive when we’re on Oahu, and for good reason. She’s a former Navy oiler, deliberately sunk as an artificial reef, and she sits upright and intact at around 30 metres. What we love about her is the penetration opportunities – the engine room is particularly cool, with light filtering in through various openings, creating this really moody, atmospheric dive. You’ll often find white tip reef sharks napping on the deck, tucked into sheltered spots, and the resident eagle rays make regular passes, gliding overhead with that distinctive, slow wingbeat. We’d suggest hitting this site early, before the crowds, as it can get busy. The current is usually pretty mild, but it's always worth a check. Keep an eye out for the schooling snapper that swirl around the superstructure, a shimmering silver cloud you can practically swim through. It’s a proper wreck dive, best for those comfortable with a bit of depth and keen on exploring interiors.
- Location
- Hawaii, United States, North America
- Coordinates
- 21.260767, -157.837500
- Type
- wreck
Marine Protected Area: Waikiki Marine Life Conservation District
Best Time to Dive in Hawaii
The warmest water temperatures in Hawaii occur in September, averaging 29.0°C. The coolest conditions are in March at 25.6°C.
Monthly Water Temperatures
- January: 26.2°C
- February: 25.7°C
- March: 25.6°C
- April: 26.0°C
- May: 26.8°C
- June: 27.6°C
- July: 27.9°C
- August: 28.5°C
- September: 29.0°C
- October: 28.6°C
- November: 27.9°C
- December: 27.2°C
Nearby Dive Sites in Hawaii
- Airplane Canyon - 27m (cave)
- Airport Beach
- Airport Beach (cave)
- Anahola Beach Park
- Aquarium - Hawaii (wreck)
- Aquarium - Hawaii (reef)
- Black Rock - Hawaii (reef)
- Black Rock - Hawaii (reef)
- Cathedral II (reef)
- Cathedrals (cave)
- Corsair Wreck (wreck)
- Edge of the World
- Enenue
- Ewa Pinnacles Reef - 26m (reef)
- Fantasy Reef (reef)
Nearest Dive Centres to YO-257
- Aaron's Dive Shop - ["PADI"]
- Affinity Freediving
- Aloha Scuba Diving Company - ["PADI"]
- Aquatic Life Divers - ["PADI"]
- Black Rock Scuba - ["PADI"]
- Blue Wilderness Dive Adventures Corp. - ["PADI"]
Marine Life in Hawaii
Home to 23 recorded species including 17 reef fish, 3 other, 2 sharks & rays, 1 whales & dolphins.
Notable Species
- Swordfish (Xiphias gladius) - Reef Fish
- Tuna (Thunnus alalunga) - Reef Fish
- Bigeye tuna (Thunnus obesus) - Reef Fish
- Dorado (Coryphaena hippurus) - Reef Fish
- Escolar (Lepidocybium flavobrunneum) - Reef Fish
- Allison's Tuna (Thunnus albacares) - Reef Fish
- Barracuda (Acanthocybium solandri) - Reef Fish
- Blue Shark (Prionace glauca) - Sharks & Rays
- Leatherback Sea Turtle (Dermochelys coriacea)
- Remora (Remora remora) - Reef Fish
- Flyingfish (Hirundichthys speculiger) - Reef Fish
- Albacore (Thunnus atlanticus) - Reef Fish
- Blue Flying Fish (Exocoetus volitans) - Reef Fish
- loggerhead turtle (Caretta caretta)
- Stripy (Katsuwonus pelamis) - Reef Fish
- Hawksbill Turtle (Eretmochelys imbricata)
- Fourwing Flyingfish (Hirundichthys affinis) - Reef Fish
- Sperm Whale (Physeter macrocephalus) - Whales & Dolphins
- Atlantic Bluefin Tuna (Thunnus thynnus) - Reef Fish
- Blue Marlin (Makaira nigricans) - Reef Fish
Recommended Packing List for YO-257
Based on average water temperature of 27.2°C, currents 9 cm/s.
- Shorty or Rashguard - warm 27°C water needs minimal exposure protection
- Mask - essential for every dive
- Fins
- BCD - buoyancy compensator
- Regulator - your most safety-critical piece of gear
- Dive Computer - tracks depth, time, and NDL
- Surface Marker Buoy (SMB) - essential for boat pickups
- Dive Torch - useful for crevices and colour at depth
- Underwater Camera - capture your diving memories