​Dock gate

  • ​a single leaf gate operates automatically to retain depths at each low tide
  • 3 vertical red lights indicates gate closed or closing or opening and an audible alarm sounds during the closing or opening phases which takes 15 minutes (5 minute pre-warning + 10 minute operation)
  • the dock gate is open for a minimum of 3 hours either side of every high tide
  • ​the width of the gateway at the narrowest point is 8 metres

Depths retained within the marina

  • the sill is at Chart Datum height and the gate when closed is at +2.6m CD Seaham to retain the depths within the marina
  • the depths on the pontoon berths are between 1 and 1.5 metres with 1.8 metres on the visitor berths


  • telephone marina office during office hours on 0191 581 8998
  • VHF current contact on channel 16 then you will be requested to switch to channel 8. Call sign "Seaham marina"


  • marina staff will normally be on pontoons to assist in direction to visitor berth and mooring however please tell us during contact if assistance would be helpful

Information for visiting boats

Seaham Harbour Marina Pontoon Berths

​We accept visiting boats all year round. Limits on length is 11 metres and draft restrictions to a maximum of 1.8 metres.

                                                                                       0191 5818998

​Marina Management, Unit 10, The Waterside, Seaham Harbour Marina, Seaham, Co Durham SR7 7EE

Welcome to

Seaham Harbour Marina


  • ​on England's east coast, the only marina in County Durham
  • 5 miles south of Sunderland, 11 miles north of Hartlepool
  • harbour entrance 54 50 13.00 N   01 19 17.00 W

Navigation marks

  • harbour entrance north breakwater black & white circle lighthouse giving green flash each 10 seconds
  • harbour entrance south breakwater 3 continuous red lights
  • marina entrance 3 vertical red or green lights to port side of gateway, do not enter gateway during 3 red lights


  • marina gateway/entrance is 276 degrees west 350 metres from centre of harbour entrance between pier heads
  • 5 knot speed limit throughout inner harbour and marina
  • 3 green lights to marina entrance indicates safe to navigate gateway but be aware of traffic in other direction (departing marina)


  • give way to commercial shipping, do not stay, anchor or drift across shipping lane
  • careful on entry to within 50 metres of marina entrance on low water springs, can shallow out to within 1 metre
  • ​two historic mooring posts within marina, marked during darkness with yellow flashing light to top, single flash each 4 seconds
  • during dredging operations in inner harbour please pass to starboard side of dredger