BBC tidal information for Wales (nearest port 483a Criccieth)
UK Hydrological office information for Porthmadog - but no tidal curve or LW information, which is available for Criccieth, but this information mirrors the BBC information (or, rather, vice versa). Note that the UKHO site requires you to enter the summer time adjustment of 1 hour in the box in the top right corner.
Page last updated: 31 January 2012