October 17, 2025 Porthmadog Tide Graph

Warning

Not to be used for navigation

Tide Graphs for Porthmadog are not published by authoritative sources and should be considered highly unreliable due to seasonal river flows and poorly understood tidal dynamics in the estuary. This graph is produced by extrapolating from published high water times and heights.

Tide times for Porthmadog, North Wales, United Kingdom. Times are GMT/BST. Heights shown are heights above chart datum.

No warranty is provided for the accuracy of data displayed. Tidal Data is ©Crown Copyright. Reproduced by permission of the Controller of Her Majesty's Stationery Office and the UK Hydrographic Office (www.ukho.gov.uk). No tidal data may be reproduced without the expressed permission of the UKHO licensing department.