France, Italy and Spain - Where should I climb?

Howdy y'all.

For graduating high school, a friend and I are planning a trip to France, Italy and Spain that will be late June to late July. We both climb around V5 and 5.11ish and we were looking to get a little bit of climbing done. Any super memorable crags / boulders that we need to see? Anything we should know as 18 year olds traveling Europe by ourselves? Things we need? Thanks in advance :)

Try and get to higher elevations during those months, temps can be brutal in Europe at those times....for bouldering or trad, Val di Mello is an amazing area.  Or north facing crags in northern Italy or Switzerland.

Second the fact that temps will be a major deciding factor. I would probably skip Spain altogether, save it for another trip in another season. Same for most of France. Most serious European climbers go north for the summer. Consider Flatanger.

Fontainebleau.  Absolute must stop, even in the heat, if only for a day of messing around on a circuit.  

Lifetime destination right there.

Buck Rogers wrote: Fontainebleau.  Absolute must stop, even in the heat, if only for a day of messing around on a circuit.  

Lifetime destination right there.

Summers in Font keep getting hotter, temps soared to 107°F last summer, just awful. And if the past few weeks are any indication it's likely to be the same this year. Seeing as the climbing is largely friction-based it really isn't ideal, unless your plane lands in Paris and you're heading south as it's barely a detour.

OP, an option would be Ailefroide, it's fairly high up (5,000 feet) and is very climber-friendly, from the campground you can walk to boulders, single-pitch or multipitch sport on granite. Hundreds of problems and routes. A 30mn-1hr drive will take you to hundreds more routes on limestone or conglomerate. Lovely alpine area with some nice hikes and usually realiably sunny weather (bar afternoon storms). Guidebook is called "Briançon climbs" and has some info in English.

Céüse is the classic summer venue but as I understand it's best that you operate at least in the 5.12s.

Val di Mello has granite bouldering and sport climbing and shouldn't be too warm so could be another option.

Yes, forget about any southern Europe or low altitude

If you do trad, Bohuslan in Sweden is one of the greatest summer destinations anywhere. Safe, clean, great campgrounds near the crags. But expensive!
 
Lots of trad all over the UK and even in summer, those can be doable.

Chamonix can be good.

You'll need a car for Sweden or UK

Second Ailefroid. Bolted granite, gorgeous, all in one area. campground accommodates 700 people!

The USA!