Conwy Notice to Mariners 12/2026

All mariners are advised that a pontoon and mooring have dragged to the south side of Conwy Bridge.  The position is latitude 53° 16.7’ north, longitude 003° 49.1’ west.  The pontoon should be passed at minimum distance of 50 metres as a submerged mooring buoy is also present. The pontoon is unlit.

A cancelation notice will be issued when the obstructions are removed.

Matthew Forbes
MSc LLB (hons) BSc AFNI
Conwy Harbour Master

Conwy Notice to Mariners 09/2026

The information below is an update to the local notice to mariners 06/2026 and 08/2026

All mariners are advised that The Environment Agency/Briggs Marine are scheduled to undertake a small scale scientific survey (sediment grab sampling) .

Date: 1st  June – 31st  June 2026.  
Duration: 2 Days
Activity:  Day grabs at 2 locations in Conwy Bay/Estuary and 2 locations in Red Wharf
Bay.
Vessel: CSV Severn Guardian   MMSI: 235091052   Callsign: 2FGL5   VHF: Ch. 16
Skipper (Briggs Marine): Mark Wiliams ([email protected])
Survey Officer (Environment Agency) :Richard Pritchard ([email protected])
 

Matthew Forbes
MSc LLB (hons) BSc AFNI
Conwy Harbour Master

Conwy Notice to Mariners 08/2026

The information below is an update to the local notice to mariners 06/2026 issued on the
12/05/2026.

All mariners are advised that The Environment Agency/Briggs Marine are scheduled to undertake a small scale scientific survey (sediment grab sampling) . The surveys are likely to be done between  12th June to 15th June.  

Duration : 1 Day
Activity:  Day grabs at 2 locations in Conwy Bay/Estuary and 2 locations in Red Wharf Bay.
Vessel: CSV Severn Guardian   MMSI: 235091052   Callsign: 2FGL5   VHF: Ch. 16
Skipper (Briggs Marine): Mark Wiliams ([email protected])
Survey Officer (Environment Agency) : Tom Lord ([email protected])

Matthew Forbes
MSc LLB (hons) BSc AFNI
Conwy Harbour Master

Conwy Notice to Mariners 07/2026

All mariners are advised that the vessel Vanguard II is presently lying on the shore at the Great Orme, latitude 53° 19.9’ north, longitude 3° 52.5’ west.

As of 0930 this morning, it was still afloat with one engine running. The vessel represents at potential navigational hazard should it float free and mariners are advised to keep a good look-out when navigating in Conwy Bay.

Matthew Forbes
MSc LLB (hons) BSc AFNI
Conwy Harbour Master

Caernarfon Notice to Mariners 05/2026

Open Water Swimming Event. Sunday, 31st May, 2026.

An Open Water Swimming Event will commence at 10:40am from Menai Slipway and finish at Y Felinheli – ETA 12:40pm . Swimmers will be keeping to the Anglesey side and will cross over at Plas Newydd – ETA 12:10pm .

They will be accompanied by safety kayakers and powerboats.

Please exercise caution when navigating in the vicinity of the event.

This notice replaces NtoM 31-05-26

David John O’Neill
Harbwr Feistr Caernarfon Harbour Master

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