According to Space.com this Moon, known as the 'Thunder Moon', will be at its perigee - that is, at the closest point to Earth - this Tuesday, July 4th. This will make the Moon appear slightly larger than normal.

However, it will be at 23:40 (Lisbon time) that the side of the Moon facing the Earth will be completely illuminated by the Sun. Therefore, this will be the best time to admire this natural phenomenon.