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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 (59–98 ft) depthBoat entryRash guard or 2mm shorty 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 29°C (85°F). Check the latest conditions and entry details before you go.

Next window today· 7:00–18:00 · favorable · sunset 17:47

Forecast for this hour · 0:00 · run 3 h ago
0.7 m (2.4 ft)waves — under a meter expected (waves — about two feet expected)

Tap a factor for its source and model point · Forecast 29°C · seasonal avg 27°C ( · Forecast 85°F · seasonal avg 81°F)

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

Mon7:00–18:00 favorable

0.7 m waves · 7 kn wind (2.2 ft waves · 7 kn wind)

Tue7:00–18:00 favorable

0.6 m waves · 5 kn wind (1.9 ft waves · 5 kn wind)

Wed7:00–18:00 favorable

0.5 m waves · 3 kn wind (1.7 ft waves · 3 kn wind)

Thu7:00–18:00 favorable

0.5 m waves · 2 kn wind (1.6 ft waves · 2 kn wind)

Fri7:00–18:00 favorable

0.5 m waves · 3 kn wind (1.7 ft waves · 3 kn wind)

Sat7:00–18:00 favorable

0.6 m waves · 2 kn wind (1.8 ft waves · 2 kn wind)

SunNot in the forecast yet

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 5:50 · Sunrise 6:12 · Sunset 17:47 · some windows run past sunset

Source: Open-Meteo marine · model point 7.4 km from site · updated 25 Oct, 21:21 GST

Forecast only — always assess conditions on site.

Compare this weekend’s windows near City of Winchester Wreck (Hallaniyat Islands)

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. January, 95% of days have historically been favorable, water has typically been 25°C (77°F), waves have typically been 0.8 m (2.6 ft), wind has typically been 14 knots
  2. February, 99% of days have historically been favorable, water has typically been 25°C (78°F), waves have typically been 0.7 m (2.4 ft), wind has typically been 12 knots
  3. March, 91% of days have historically been favorable, water has typically been 27°C (80°F), waves have typically been 0.8 m (2.7 ft), wind has typically been 12 knots
  4. April, 76% of days have historically been favorable, water has typically been 27°C (81°F), waves have typically been 1.1 m (3.5 ft), wind has typically been 15 knots
  5. May, 42% of days have historically been favorable, water has typically been 28°C (83°F), waves have typically been 1.5 m (5.1 ft), wind has typically been 18 knots
  6. June, 4% of days have historically been favorable, water has typically been 25°C (77°F), waves have typically been 3.0 m (9.9 ft), wind has typically been 26 knots
  7. July, 0% of days have historically been favorable, water has typically been 22°C (71°F), waves have typically been 3.9 m (12.9 ft), wind has typically been 33 knots
  8. August, 0% of days have historically been favorable, water has typically been 22°C (71°F), waves have typically been 3.3 m (10.7 ft), wind has typically been 30 knots
  9. September, 20% of days have historically been favorable, water has typically been 25°C (78°F), waves have typically been 2.1 m (6.9 ft), wind has typically been 20 knots
  10. October, 81% of days have historically been favorable, water has typically been 27°C (81°F), waves have typically been 1.0 m (3.4 ft), wind has typically been 12 knots
  11. November, 100% of days have historically been favorable, water has typically been 28°C (82°F), waves have typically been 0.7 m (2.4 ft), wind has typically been 12 knots, historically most favorable
  12. December, 86% of days have historically been favorable, water has typically been 26°C (79°F), waves have typically been 0.9 m (2.9 ft), wind has typically been 15 knots

November 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.

Fills & rentals nearby

No dive shops mapped within 25 km (16 mi). 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.

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