Swim Good's 'Summer Solstice' is one of those songs that, as you're listening to it, you're sure you've already heard it. Catchy, poignant ... pity about the petering out ending.
More catchy, summery guitar-led tunes, this one courtesy of Atlas - 'Coin'
And more of my current crush - Oh Land's 'My Boxer', a slightly eerie song with a great hummed riff. Sadly no embed available, but you can listen on Soundcloud.