 On the night of 6/7 June, "Onslow" was near missed by a bomb, causing slight damage,, while on the night of 11/12 June, she was on patrol with , "Offa" and "Oribi" when they clashed with a group of six German S-boats attempting to attack invasion shipping.On 18 June, "Onslow" was hit by a German air-dropped torpedo which failed to explode, again causing slight damage, with the ship being under repair (from both this damage and that of 6/7 June) for 5 days.On 12 August, "Onslow", together with the cruiser and the destroyer sank the German auxiliary minesweeper "Sperrbrecher 7" near La Rochelle.