In reply to ebdon:
Second what others said about The Burren and Glendalough. Pretty much everything North of the Mirror Wall at the Burren (i.e., Dancing Ledges and Arran Wall area) is non tidal, and you can walk to the base (but quicker to just set up an abseil and leave it in place for the day). Dalkey has some great climbing across the grades, but would probably recommend some of the other spots instead, if only because you're still in a city park for Dalkey- albeit it does have beautiful views across the Bay
The Prow area is all single pitch at Fairhead and the easiest access/lowest intimidation, definitely worth going. It's the closest part to the carpark, routes mostly ~30m. The gully down is fine- not really sketchy, it just takes a bit longer. There's a couple of quality VS routes (Fence and Black Thief) that would be a much more fun way out. There are a couple of multipitch VS (Girona, Taoiseach) beside the descent gully with nice ledges for the belays too...
Kerry and The Mournes are two areas that would also have a decent amount of single pitch crags with a good spread of grades.
For the mournes- Lower Cove is about an hour walk in and has a good spread grade wise, and Pigeon Rock is 10 minutes from the road.
Dunshean Head in Kerry is a beautiful spot on a sunny day- ab in or scramble down (easy VDiff). Just make sure to give the farmer a call and bring a bit of cash as he lets people park in his yard- phone number for him should be on the UKC page.
Gap of Dunloe is also class and definitely recommend, beautiful sandstone, selection of crags and grades and mostly 1-2 pitches- often bolts to ab off the top, and most of the two pitchers can be stretched into one...
For easier mountain routes- you've a classic in each province- FM (VD) in the Mournes, Great Gully Ridge (HS 4b) in Wicklow (next valley over from Glendalough, has some single pitch on the sidewall of the gully too), Howling Ridge (Summer) (VD) in Kerry and Carrot Ridge (D) in Galway. Probably recommend Howling and FM as they're close to other climbing areas (Dunloe and Lower Cove respectively) You've also got Sport Climbing on the Arran Islands.
In Donegal, Muckross Head is a must visit, just to experience the insanity both of the routes and route names (think VS with a 2m roof...!)- plus a 2 minute walk in. Gola Island is lovely as well, even if you never got to climb, nice place to be for a day or two.
In short...yes, plenty to go at! Would recommend getting Dave Flanagan's Rock Climbing in Ireland guidebook, it's the only book you'd need really. Happy to give specific route recommendations too, but figured this is long enough already (haha haven't been climbing back home in over a year, so your post got me psyched thinking back on a few places, hence the length!!).
Post edited at 23:05