HELIOS 3’s exterior decks are as spacious and comfortable as her interior, thanks to her hull and bridge deck extensions. Over 220m2 (2,500ft2) of the 347m2 (3,743 ft2) exterior decks are dedicated to guests. The foredeck features high coachroofs, with large sun pads port and starboard. Twin circular skylights with stained glass become a design feature breaking up the white area.

The garage, where the tender is stowed, can be transformed into an open-air living area when the transom door is open. A large swim platform provides easy access to the water.