We did the ring road in late June 2016. While I have many great take aways
overall it was a rough and somewhat disappointing trip. We had sideway rain
about 12 of our 15 days trip.
We did find good accommodations. We did find really good! food (lots of research).
We found the people amazing.
Still, we had to cancel 80% of our plans and make do because of the weather.
July is usually great weather but sometimes it is not. I believe last year saw a week of
sideway rain as I read from a couple of photographers who could not take pictures.
Just be prepared with back up plans and be flexible. Wear many layers. Keep your gas filled
at all times if you do the ring road. Pay attention to the roads to take and not take.
(sorry cannot think of the point I am thinking about right now). Read trip advisor.
When you read that toilets are few and far between believe it.
I traveled with my own homemade porta potty–tupperware with a tight lid.
I thought I would hate the Blue Lagoon–it did rain the entire time we were there–still, it is quite the weird experience and we were glad we did it. We ate dinner in the main restaurant and it was quite good with amazing service.
So–yes! go, be flexible. Know that it might not be THE trip you imagined but there will
be highlights no matter what.