The planned Wednesday launch of four civilians on a privately chartered spaceflight featuring the first commercial spacewalk has been delayed again, this time because of predicted bad off-shore weather where the crew capsule will splash down at the end of the flight, SpaceX announced late Tuesday.

The mission, a risky endeavor previously undertaken only by government astronauts, was set to take off as soon as 3:38 a.m. ET Wednesday at NASA’s Kennedy Space Center in Florida, but now won’t launch until at least Friday, weather permitting, SpaceX announced.