Hi Albert!
Kallirachi is West coast and Potos is south....the conditions vary massively between the areas but if you drive, there are always great places to dive.
Nice one with the cam! I recently bought a GoPro and a housing to fix the blur, so I will take some video and pictures too. There are a lot of great spots and I bet you will get some great pictures. Even if there is not a massive amount of life in the water, there is ALWAYS something to see.
The water in August should be quite warm...I use a 3mm open-cell (full arms/legs) and get very hot in July. I flood the suit regularily to keep cooler.
August is also the hottest month....so 5mm would be way over the top! But then, we are all different!
Kefelas, I have not dived...seen a lot of spearos out there however...and been told it is good diving. Great caves, if I am not mistaken some pinnacles sticking out of the water. My wife scuba dived in the area last year and loved it.
I will give it a go this year...
Make sure you have a bouy with you. There are a lot of boats in the area!!!!
Astris is also good....take the dirt road to "chill out beach" very nice beach...left from the beach along the shore 500m....you will find some very deep gorges...nice fish there too.
Left from the beach, some nice spots too...a bit shallower, but good too.
If I have time after my stay in Thassos (June 29- July 13), I will post some pics and give you a few more spots...
Enjoy! Thassos is one of my favourite places in the world!
Regards,
Darryll