Currently, there is an urgent demand for polycarbonate (PC) products with durable superhydrophobicity for outdoor use. In this work, an effective approach is proposed to prepare durable and superhydrophobic silica (F-SiO2)/epoxy nanocomposite coatings for PC by dripping with an acetone solution of F-SiO2 and epoxy mixture. This strategy allows F-SiO2 to be adsorbed on the PC substrate which is roughened during the swelling and crystallization process in the presence of acetone. The addition of epoxy further effectively enhances the adhesion between coating and roughened PC substrate. The effects of F-SiO2 and epoxy content on surface morphology, wettability and mechanical stability of the superhydrophobic coatings are discussed in detail. The coating prepared under the optimal condition shows an excellent superhydrophobic property with a water contact angle (WCA) greater than 160° and a sliding angle (SA) less than 2°. Besides, it can remain the excellent superhydrophobicity after various external mechanical damages (such as tape adhesion, knife scratch, finger wiping and sandpaper wear) and different corrosive environments (acidic, alkali and salinity solutions). Furthermore, the coating exhibits superior anti-aging properties and anti-icing performance. Therefore, it is believed that the as-prepared superhydrophobic coatings have the potential to satisfy the practical requirements in many outdoor applications.