Wiltshire Police say: "Solstice 2012 has been a positive experience for the majority ofvisitors to Stonehenge. Despite the rain there were approximately 14,500 people who came to enjoy the celebrations.
"Our aim was to make sure that everybody had a safe and enjoyable evening which, along with our partners, we achieved. As with every year, sadly there was a small minority who were determinedto disregard the law.
"These people were dealt with robustly and there were 20 arrests throughout the night. We would like to thank of all our partners for yet another successful event."
Druids and Pagans will hold ceremonies to mark the longest day of the year. WIltshire Police are working with English Heritage to make sure adequate security measures are in place. A guide to parking and other arrangements has been drawn up by English Heritage.
Pictures from last year's ceremonies at Stonehenge.