Reminiscing about Panathanaikos game in Athens a few years back and i think it'll be similar conditions.
Game kicked off at like 10pm local time or something like that, and it was 28/29c even at that time. Team did alright and held their own just about in the first half, but fell apart in the second due to the heat. Difference being that Panathanaikos were clearly several steps above us in terms of squad, performance and experience - Hapoel are maybe only 1 step up on that one.
I think if we put in a decent team performance, it'll all come down to how we adjust to the heat. I would certainly argue that our team is fitter than they were back then.