Met Office Begrudgingly giving the basic forcasts for free. Would dearly love you to buy detailed information. No frills , with a link to a diagram of the Sea Areas Prettier , with links to more background information. In particular, the link to an audio file of the most recent radio broadcast is very useful when practicing note-taking. The 'Beeb' is good if you want to explore the topic.
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They carry background features on Weather. A recent addition is the link to a Real Audio file of the TV Forecast. Check out their list of products. Use it at least to get the definitions of terms used in the Sea Area Forecasts, which are different to those used by the UK Met office in the Shipping Forecasts. More detailed on-line information on Irish waters is available in the section below.