I know it's all based on computer models, rather than a proper forecast, but in my experience of their UK , the weather is <rarely> worse than the forecast.
I'm not going to PQ, but if I was, I'd be happy with that forecast, as the wx would probably be better.
However, long range forecasts are about as reliable as pete doherty. They might as well use a pin, you only really get decent accuracy within 3 or 4 days.