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Tidal Data Sheets
 
2010

    Important notes for understanding the tidal sheets

    All these figures are given as a guide only and cannot be guaranteed due to adverse weather conditions which may occur. Quoted times are an average.

    Actual times are safe times to cross over the causeway to Shell Island.

    A question mark (?) indicates caution is necessary as the tide indicated is borderline and can easily be affected by bad weather.

    Height of High tides are estimated heights over the sand bar at the entrance to Mochras Lagoon.

    Where a space may occur in the table this is due to the lunar oscillations not concurring with the turn of rotations of the Earth, therefore read the next tide time . A.M. & P.M. tides are in accordance with the time of High tide.

    Due to changes supplied to us in the form of raw data this year we suspect there may be some inaccuracies in these times. 

    Tidal Adjustments based on high water at Shell Island

    Location Calculation Time Adjustment
         
    Aberdovey Subtract 2 Minutes
    Aberystwyth Subtract 28 Minutes
    Abersoch Subtract 15 Minutes
    Bardsey Island Subtract 16 Minutes
    Barmouth Add 5 Minutes
    Criccieth Subtract 2 Minutes
    Cardigan Subtract 39 Minutes
    Fishguard Subtract 39 Minutes
    Milford Haven Subtract 2 Hours 9 Minutes
    Pothmadog Add 17 Minutes
    Pwllheli Subtract 5 Minutes


    Click HERE for this months tide table

 
 
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