For our August competition, we want to see your best photographs on the theme of coast. Send us your photographs and you will be in with a chance of a winning an Arctic activity and photography trip to Swedish Lapland.

August’s winning image will be mounted and exhibited in an end-of-year exhibition in the foyer gallery at the Guardian’s London office. Once the exhibition is finished digital printers Point 101 will send you a copy of your shot to place with pride on your own wall. All the monthly winners will be entered for the overall prize, an incredible four-night trip to Sörbyn Lodge and the Aurora Safari Camp, courtesy of Artisan Travel.

Please read: You can only enter ONE image per monthly competition.

You must be a UK resident to enter and we need you to upload the highest possible resolution of your shot via GuardianWitness. You’ll also need to provide a caption of up to 80 words on where it was taken, what’s happening in the shot, what inspired you to take it etc.

You must also supply your full name with the caption.

The closing date for entries is 23.00 on 25 August 2015.

GuardianWitness is the home of user-generated content on the Guardian. Contribute your video, pictures and stories, and browse news, reviews and creations submitted by others. Posts will be reviewed prior to publication on GuardianWitness, and the best pieces will feature on the Guardian site.

And don’t forget to read the terms and conditions before you enter.

See the monthly winning photographs of 2014’s competition