SpaceX has once again pushed back the launch of its Polaris Dawn mission, which is expected to carry four private citizens to space, this time because of an unfavorable weather forecast.

The company attributed the delay to poor conditions off the coast of Florida, but it did not specify whether the primary concern was weather that could affect the spacecraft's splashdown in the event of an emergency or if the risk pertained to the crew's return at the end of the five-day journey.