At 08:00 on 9 July the Russian flagship signaled the attack. By 09:30 the first ships had reached firing distance in the western flank but soon after fighting spread throughout the battle lines. The Swedish right wing under Lieutenant Colonel Törning met with increasing resistance as the Russian left wing opposing him was reinforced. However, the Swedes were able to move ships from their reserves to support their right wing with a counterattack which managed to lead the Russian left wing into disorder. Meanwhile, an increasingly strong southwesterly wind forced the Russian center deeper between converging Swedish lines. After no Russian ships were seen approaching from Frederikshamn, the Swedes were able to release more ships from their reserves to bolster the Swedish left wing led by Lieutenant Colonel Hjelmstierna. Half of Hjelmstierna's ships were sent to the rear of the Russian fleet through a narrow passage between Legma and Kutsalö which in turn forced the Russian right wing to deploy accordingly. However, movement to the back of the line was read as a signal to withdraw by the Russian left wing which started its retreat leaving the Russian center to face the Swedes alone.