GRAB your cameras for a supermoon is set to cause a spectacular sight this weekend.

The full Moon on Sunday is set to be the biggest this year and could even be an “extra supermoon”, experts say.

The effect is caused when the Moon reaches its closest point to the earth, known as a perigee Moon.

It could make it appear up to 13 per cent bigger in the night sky.

The best time to view the Moon will be when it appears lower in the skyline, just after darkness. 

There are three opportunities to see a supermoon this year. One has already taken place on July 12, resulting in some amazing photographers from across the world. Another is due on September 9.

Geoff Chester of the US Naval Observatory said: “Generally speaking, full Moons occur near perigee every 13 months and 18 days, so it's not all that unusual," he says.

"In fact, just last year there were three perigee Moons in a row, but only one was widely reported."

We'd love to see your pictures if the skies are clear - email or tweet us @bournemouthecho.