So a supermoon happens when the full moon falls on a day when the moon is closer – noticeably closer – than average. Beyond Sunday’s ‘Supermoon’: Lunar Perigee Science : Discovery News
The best time to see the full moon close to perigee will be on Saturday evening, Aug. 29.
Actually, perigee (point of closes approach to the earth) and the full moon will really be a thing next month. But I say take what you can get. The weather might be bad next month.