It depends on the direction of winds etc… The whole phenomenon is called tropospheric ducting and there are forecast maps for chances of it here:
This is how Tassie can receive mainland TV channels when the conditions are right in summer although things are a lot harder now since digital than it used to be in the analogue days.
Different signals will also work better than others too, lower band signals like VHF will go further than the higher UHF signals and AM radio will always work better than FM radio at travelling distance. AM radio you can also get all sorts of different locations, here in Tassie I’ve had times where I’ve received NSW, Queensland, SA and even WA once or twice depending on how the signals bounce around. Victoria is usually available, I can often listen to 774 quite easily around NW Tassie with no issues.