These tide predictions for the Port of Swansea are based on the Admiral Chart Datum (ACD) and times are adjusted for GMT and BST (GMT/BST/GMT), as appropriate. 

 

 

 

 

 

 

Port of Swansea: The ACD zero is 2.82m above the cill gauge zero.  The following tide predictions will therefore be approximately 3m above the previously used Ordnance Datum of predictions for the Port of Swansea.