After escort and screening duty along the east coast and to the Caribbean, "Dyson" sailed from New York 14 May 1943 for the Pacific. She joined Task Force 36 (TF 36) at Nouméa, and served from this base and Espiritu Santo in support of the consolidation of the Solomons, patrolling, and escorting convoys. In August she began operating in the Solomons themselves. On the night of 3/4 September in company with she intercepted and sank two barges and damaged another between Choiseul and Kolombangara while patrolling to block Japanese movements by water. Later that month on a similar sweep, she fired on an unidentified ship which burned and disappeared from sight.