score:12
In August most roads should be open. The condition of any given road can never be guaranteed though. You should consult the website of the Icelandic Road Administration for up to date information about what roads are closed. If you click on the Condition of Mountain tracks you'll see the current state. Most roads are open by now, but its been a cold summer so not quite all of them are open.
By the end of August there may be some closures (most likely due to them being washed out) but most should remain open. If you are unsure, you can (while in Iceland) call 1777 for up-to-date information. Do not try to drive on a closed road. If in doubt, call for information.
It is astonishing the number of tourists who ignore road-closed signs and get themselves into serious trouble.
You do not need a 4x4 on "normal" roads. If you plan to stay on the primary roads you can get by fine without one. However, you should not go on any roads marked in red on this map if you are not driving a 4x4 with good ground clearance.
Note that you can drive on regular roads all the way to VatnajΓΆkull, the largest glacier in Europe. Just follow the ring road (route 1) along the southern coast. Can't miss it. It is about 4-5 hour drive from Reykjavik, assuming no stops. And there are plenty of interesting places to stop along the way.
Upvote:3
Just as an update...
We did eventually hire a Chevrolet Captiva 4x4, which was a great car to drive around.
We didn't actually make it onto the F roads, but ended up having to drive on gravel tracks, which were probably pretty much the same.
The only problem we had, was that this car which is a 4x4, aka all-wheel-drive, got stuck drive through some mud.
I then remembered that you really need Differential lock, to be able to drive out of mud, as both front and back wheels on one side were stuck.
If only front OR back wheels had been stuck, it wouldn't have been a problem, but it was both right hand side wheels were stuck and therefore the left hand side wheels just kept spinning.
Just a word of caution. We didn't drive through a river, it was a larger puddle...quite annoying. But a brilliant local turned up and pulled us out with a massive rope!
Enjoy!