Defenders heaviest vessels were unable to navigate to the shallow waters in the bay and were easily captured by the attacker.

After the battle the Swedish ships entered Fredrikshamn harbor and demanded the commander of the town fortifications to surrender along with the remainder of the Russian fleet.

Any surprise initiative the Swedes had after the battle was lost when Gustav III allowed the Russian commander request of an hour of respite to value the demands of surrender.

According to several historians the Swedish archipelago fleet under King Gustav III lost golden opportunity when instead of attacking 14 May 1790 they chose to delay until 15 May.

Final chance to capture the fort was lost on 15 May when king allowed an hour of respite which made it possible for the Russians to gather reinforcements and prepare their defenses.