When is weather too dangerous for car ferry?

Weather conditions are considered too dangerous for car ferries when there are high winds, rough seas, or reduced visibility. Typically, winds exceeding 25-30 knots (about 29-35 mph) and wave heights over 4-6 feet can pose significant risks. Additionally, severe storms, heavy rain, or fog can hinder navigation and safety. Ultimately, the decision to suspend ferry operations is made by the captain and company based on safety protocols and weather forecasts.