Hi Jas, There is a site named 'Heavens above' Link :
http://www.heavens-above.com/
You will need to Register and enter your location so the programm can predict Iridium Flares (and other events) for where you are ! You have two options on how to do this, A) Choose a major nearby city or town in your area; OR You can use the mapping supplied, and keep zooming in untill your over your house for a more accurate reading, there will be some Longitude and Latitude co-ord there somewhere for you to note down and then can use these ! These Co-ord can be a little tricky, but there are examples/explanations to help you out !
For starters tho, a nearby Town will suffice
On the attached clip below, I have highlighted the link in yellow for info on Iridium Flares you can use once your set up & running
All the best ! !