Hundreds of music fans headed to Southsea and packed out sweltering venues including The Wedgewood Rooms, The Wine Vaults, Back To Belgrave and The Deco.
The event aims to highlight the best in up-and-coming and unsigned acts.
Hotly-tipped indie band Hallan headlined at The Wedge, but there was something for most music-lovers, from the hip-hop of Stratz and Joe Burger, to roots from Waif and Stray, vocal powerhouses Mary Red and Hannah Reem, and much more.
The festival will return for its regular winter edition in its traditional spot at the end of January.
5. Icebreaker Summer Festival
The Howlers were the penultimate band of the day at The Wedge Photo: Paul Windsor
6. Icebreaker Summer Festival
Hallan closed out the day with their set at The Wedgewood Rooms Photo: Paul Windsor
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