According to Mr Kerss, the Moon will be slightly smaller and not as bright as the May Flower Moon but it will “nevertheless be spectacular” when rising and setting.
The difference in size and brightness during a Supermoon is usually not discernable to the naked eye.
But when you look at the Supermoon during moonrise or moonset, the so-called Moon illusion kicks in.
Mr Kerss said: “This is an entirely psychological phenomenon but it’s still very impressive.”
The Moon illusion is an optical illusion that causes the Moon to appear larger near the horizon than when it is higher up in the sky.