Current Weather
The Dun Laoghaire Weather station real-time feed is available here.You can also access real-time info from the Dublin Bay Buoy here.
WindForecasts
The EarthNull wind forecast is a good graphic, and worth a look. It's here.Here's the WindGuru forecast for Dún Laoghaire. It's usually quite accurate.
Met Eireann
Here we have the Met Eireann 3-hour forecasts for rain and wind. The wind chart gives the speed using the "ticked" arrow format. Each full tick represents 10 knots of wind, each half tick represents 5 knots.This is the best short term forecast.