Full Description & Details
Dereagzı is a natural bay anchorage on the southern shore of the Sea of Marmara, near the town of Armutlu in Yalova Province, Turkey. The bay sits close to the settlement of Bayır, with the surrounding coastline rising into low hills that give the anchorage a sheltered, enclosed feel. It is a working coastal area rather than a developed marina, and its character is shaped by local fishing activity and the busy shipping lanes of the Marmara.
Protection at Dereagzı is moderate. Harbourmaps rates its overnight wind shelter at 89 points, indicating reasonable but not complete cover from prevailing winds, with the algorithm-derived safe wind directions based on the height of the surrounding terrain. There are no published data on depths, berths, or holding quality for the anchorage, so a skipper should approach with caution and confirm conditions on arrival. The bay is open to the Marmara, and the area sees significant commercial traffic, including tankers.
Facilities at Dereagzı are minimal. Harbourmaps reports no data on available amenities, mooring arrangements, or services, and there is no indication of fuel, water, electricity, or shore-side support. The nearest substantial harbour infrastructure is at Yalova, some distance away. Visiting vessels are recorded via AIS, but the bay itself offers little beyond a natural place to anchor.
Safety is a genuine concern here. In July 2026, a private boat named Dido was struck and sunk by a tanker off Dereagzı Limanı, with the two people on board rescued by nearby vessels. The incident prompted an investigation by the Coast Guard and the suspension of the tanker's operations. Mariners should keep a sharp lookout for large ships transiting the approaches, maintain a proper watch, and consider the anchorage's exposure before committing for the night. The best use of Dereagzı is as a short stopover in settled conditions rather than a long-term base.
How to get there
Approach Dereagzı from the Sea of Marmara, heading toward the southern coastline near Armutlu. The bay lies close to the town of Bayır, and the approach is open water with no published channel, buoyage, or waypoint data for the anchorage itself. Given the heavy commercial traffic in the area, including tankers, maintain a vigilant lookout and monitor VHF for local traffic.
There is no recorded VHF working channel for Dereagzı, so rely on standard watchkeeping and the Coast Guard on channel 16 if needed. Land access is via the coastal road serving the Armutlu area, with the town of Armutlu and the larger centre of Yalova reachable by road. The nearest airport is some distance away, with Istanbul's airports the practical option for crew changes.
There are no formalities specific to Dereagzı beyond standard Turkish entry procedures for visiting yachts, which are handled at designated ports of entry rather than at this anchorage.
Frequently Asked Questions
Is Dereagzı anchorage safe from wind at night?
Harbourmaps rates Dereagzı's overnight wind protection at 89 points, indicating moderate shelter, but the bay is open to the Marmara and safe wind directions are algorithm-derived, so confirm conditions before anchoring.
What facilities are available at Dereagzı?
There are no published data on facilities at Dereagzı; Harbourmaps reports no amenities, mooring arrangements, or services, and there is no indication of fuel, water, or shore power.
Is there a risk from shipping traffic at Dereagzı?
Yes, in July 2026 a private boat named Dido was struck and sunk by a tanker off Dereagzı Limanı, so keep a sharp lookout for large commercial vessels in the approaches.
What is the holding like at Dereagzı?
No data on holding quality or seabed type at Dereagzı has been published, so a skipper should verify holding on arrival and be ready to relocate if conditions are poor.
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