In reply to mutt:
Somewhat stating the obvious, Scotland is best when the weather is nice and there aren't many midges... Given that both these factors (especially the former) are pretty variable, if you are lucky enough to have a bit of flexibility it really pays to be opportunistic and reactive!
Not everyone is lucky enough to be able to head north based on a good medium term forecast (but great if you can!) However, one of the great advantages of climbing in Scotland is that you have the choice of seacliffs, valley crags and high mountains, so there's nearly always an option even if it means driving a bit. Also, although you've said "West Coast" bear in mind that especially in the far north it really isn't far from west to east coast (only an hour or so from Ullapool to Inverness), and there's often completely different weather (and midges) prevailing on the other side.
Using the above philosophy (and being lucky enough to be van-based) we've enjoyed some fabulous midge-free Scottish trips in the last few years:
- August 2017 East Coast Inverness to JO'G
- May 2018 Central Highlands
- July 2018 Far north west
- May 2019 Skye to Reiff
Blog posts with photos and beta from a couple of dozen crags here: https://rockaroundtheworld.co.uk/category/uk/scotland/
A few absolute favourites:
- Sheigra https://rockaroundtheworld.co.uk/2018/06/29/sheigra/
- Glen Nevis https://rockaroundtheworld.co.uk/2018/05/17/wave-buttress-steall-meadows-cr...
- Skye seacliffs https://rockaroundtheworld.co.uk/2019/05/08/suidhe-biorach-climbing-over-th...
- Moy Rock https://rockaroundtheworld.co.uk/2017/08/02/moy-rock-scotlands-answer-to-ri...