I will be in Ireland October 16-25 and would like to include the Cliffs of Moher in my itinerary. However, Rick's book says the visitor center is closed October-March. Is this because the visibility is usually not good enough at those times of year to see the cliffs? Is a visit to the cliffs enjoyable in October even if the visitor center is closed?
I just checked the website. It shows the 2009 schedule as being open all year. October hours are 9:00 - 6:30.
The visibility and weather in Ireland is always a crap shoot. The last time we were at the Cliffs (Sept '05) was 50 mph wind and rain, but it is still a phenomenal site.
Christmas Day is the only day the visitors center is closed at the Cliffs of Moher. I've visited the cliffs in February, when it was absolutely freezing cold, but it was still beautiful. And the new visitors center makes it possible for you to view the cliffs in comfort even if the weather is bad. The best time to see the cliffs is in the afternoon, when the light is on them.
To answer your question about whether the cliffs are still enjoyable if the visitors center is closed, yes. The current visitors center has only been there since 2006 and people have been visiting the cliffs forever.