CAPE CANAVERAL, Fla. — NASA and SpaceX have delayed the planned launch of the Crew-11 mission to the International Space Station (ISS), citing unfavorable weather conditions along Florida's Space Coast.

Mission managers made the decision after reviewing weather forecasts indicating conditions outside acceptable launch safety limits. The postponement came shortly before the scheduled liftoff from Kennedy Space Center, where astronauts had already completed final preparations.

Crew-11 is part of NASA's Commercial Crew Program, which partners with SpaceX to transport astronauts to and from the ISS. The mission will replace the current crew aboard the orbiting laboratory and continue scientific research in microgravity.

Officials emphasized that astronaut safety remains the highest priority and that launch teams will continue monitoring weather patterns before announcing the next available launch window. Weather-related delays are common for human spaceflight missions, particularly during Florida's active summer thunderstorm season.

The mission will carry an international crew that will spend several months aboard the ISS conducting experiments in medicine, Earth observation, biology and advanced technology. The research supports future deep-space exploration while also benefiting scientific innovation on Earth.

SpaceX has become NASA's primary commercial transportation partner for routine astronaut missions, and Crew-11 represents another milestone in the agency's long-term partnership with the private aerospace company.

Thousands of spectators had gathered along Florida's coastline to watch the launch, while millions more followed the countdown through NASA's live broadcast before the weather delay was announced.

A revised launch schedule is expected once weather conditions improve and mission managers complete additional safety assessments. Until then, the Crew-11 astronauts will remain in pre-launch quarantine while teams prepare for the next launch opportunity.

The delay highlights the complexity of modern human spaceflight, where even advanced spacecraft must wait for favorable environmental conditions before safely beginning their journey into orbit.