Arklow tides

Fished Arklow yesterday and checked easytide and irishtimes tides and both were around 4pm highwater.
We fished up to 8pm and it looked like the tide was only full then.
I met a local and he said the tides were usually wrong on these sites as there is two tidal runs that meet in the area.
He mentioned the local council use a website called admiral or something?

What's the best way to find the tides for Arklow?

cheers

http://www.sailing.ie/Racing/Tides/TidesDublin.aspx -2.38 for Arklow