Would u believe that I have done 16 dives on the it over the last month - heading up there again soon - this time I will look at the temp, I never bother noting the temp - believe a lot of it is in the head!
It does be colder than the sea, last year it was just over 5degrees one day, it can also be warmer than the sea in the summer
The viz was quiet good up there on Monday - I would say the biggest concern with it is the amount of divers on it. Parking is very limited for example there was only about 8 cars there on Monday but we needed to park in the laneway leading to it - but a tractor was approaching and we had to move the cars - luckilly some were leaving and we could then take their place.
There is a very nice lady who lives in the house - please be nice and keep away from her house - some use her wall etc for kitting up - must be a nightmare for her - i was in her house with a friend who knows her 2 years ago and the stories would make u sick of divers.
also the viz on the wreck can be stirred up very quickly and there is alot of overhead areas leading to entanclement if the viz is very poor
I love the wreck - if it was in better viz it would be amazing - it can also be quiet challenging for a 21-23m dive because of the darkness and the swim out
The swim out is taking me (now with the rebreather) about 7 mins - as I am taking my time but on oc I was doing it in about 5 by ripping out!
Take note of the location of the line as there is alot of boat traffic overhead and there can be strong currents on the surface especially as you can generally find shelter on the wreck as you want to come back along it - you also need to account for the return journey for air consumption - it is a very mild ascent / descent except for the first 6m, which can be good for stops etc..
When you go in by the pier the thick black cable is on the left of the pier a few feet away from it to its left and towards the sea.
I hope this helps
Tom