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Map of City of Winchester Wreck (Hallaniyat Islands)
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City of Winchester Wreck (Hallaniyat Islands)

Dhofar, Oman
AOW suggested18–30 m depthBoat entry3mm wetsuit typical

Boat dive — see Entry & access.

City of Winchester Wreck (Hallaniyat Islands) at a glance

City of Winchester Wreck (Hallaniyat Islands) is an advanced boat dive site in Dhofar, Oman with depths of 18–30 m (59–98 ft). Typically most favorable Nov · from 3 years of archive data. Divers commonly see Bigeye trevally (jacks), Green turtle, and Honeycomb moray. Recent reports put the water around 22°C (72°F). Check the latest conditions and entry details before you go.

Marine model · graded 1h ago
2.1 mwaves — about two meters expected

Tap a factor for its source and model point · Forecast 22°C · seasonal avg 25°C

Site hazards: Very remote (liveaboard-only, far from any recompression chamber); exposed open-ocean conditions and swell; current; wreck snag/entanglement hazards; seasonal access only.

Read the full hazards ↓

Dive windows this week

Best: Mon
Fri—
Sat7:00–19:00
Sun7:00–19:00
Mon7:00–19:00
Tue7:00–16:00
Wed7:00–19:00
Thu7:00–8:00

Favorable windowModerate window— no window

First light 5:41 · Sunrise 6:03 · Sunset 18:21

Source: Open-Meteo marine · model point 7.4 km from site · graded 1h ago

Forecast only — always assess conditions on site.

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: Bigeye trevally (jacks), Honeycomb moray, Mobula ray
Best time: Roughly November to May (liveaboard season); cooler months bring whale sharks and humpback whale activity in the region.

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. Jan95%25°C0.8 m
  2. Feb99%25°C0.7 m
  3. Mar91%27°C0.8 m
  4. Apr76%27°C1.1 m
  5. May42%28°C1.5 m
  6. Jun4%25°C3.0 m
  7. Jul0%22°C3.9 m
  8. Aug0%22°C3.3 m
  9. Sep20%25°C2.1 m
  10. Oct81%27°C1.0 m
  11. Nov100%28°C0.7 m
  12. Dec86%26°C0.9 m

November 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

A large historic wreck lying off Al-Hallaniyah in the remote Hallaniyat (Khuriya Muriya) Islands, the first British merchant ship sunk in WWI, now resting at roughly 20-30 m. The broken hull is smothered in fish, with barracuda, batfish, jacks, rays and mobulas regularly swarming the structure in clear, nutrient-rich Indian Ocean water. The islands are reached only by liveaboard out of Mirbat near Salalah and are dived seasonally, with the wider area famous for non-migratory Arabian Sea humpback whales and cold-season whale sharks. This is a remote, advanced destination far from any support.

boatreefwreck

Very remote (liveaboard-only, far from any recompression chamber); exposed open-ocean conditions and swell; current; wreck snag/entanglement hazards; seasonal access only.

Reviews

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