Monitor shipping movements: http://marinetraffic.com/ais/

Weather forecasts: http://www.xcweather.co.uk/

Sea State forecasts: http://magicseaweed.com/

Holyhead info, including tides: http://www.holyheadport.com/

Welsh Sea State info: http://www.windfinder.com/report/wave/aberporth_buoy
[windfinder – good resourse]

Irish Met and Sea state info:
http://www.met.ie/marine/marine_map.asp

http://www.met.ie/latest/buoy.asp [bouy reports…M2 and .M5 = irish sea]

http://www.met.ie/marine/buoy_locations.asp [lat long of bouys]

http://www.met.ie/forecasts/coastal.asp [crossing reports and forecasts]

Webcams for sea state info:
http://www.oceanscene.ie/lahinchsurfingcentersurfwebcam.html [west coast of Ireland in bay]

http://78tramore.home.dyndns.org/view/index.shtml
[Southern coast of Ireland
in a bay]

http://www.strandhillsurfschool.com/page/north_end

http://www.strandhillsurfschool.com/page/main_beach
[west coast of Ireland
in a bay]

http://www.bowwaves.com/sea_area_forecast.php

http://www.surfwales.com/cams/cams.htm
[good resource for multi webcam sites along west wales coast]

http://www.meteosurfcanarias.com/webcams/new/beach-cams-galway-cork-dublin-country_ireland.php [collection of webcams]