Abstract: Sea spray icing poses significant risks to a variety of actual production activities such as maritime navigation and offshore wind power generation; therefore, understanding the icing mechanism of seawater droplets and developing effective deicing technologies is essential. In this study, carbon nanotube (CNTs)-based photothermal superhydrophobic coatings and photothermal slippery composite surfaces, consisting of CNTs and silicone oil, were prepared using a simple spraying method. The photothermal effect induced the ice melting and deicing performance of these surfaces, especially under varying NaCl droplet salinities, were investigated. At room temperature, the hydrophobicity of the photothermal superhydrophobic surface enables droplets to rebound quickly upon impact, while the photothermal slippery surface, enhanced by a lubricating silicone oil layer, allows droplets to slide off smoothly. Both surfaces exhibit excellent self-cleaning properties. Due to the photothermal effect of CNTs, both surfaces exhibit stable visible wavelength absorption of approximately 98%, along with excellent surface heating and photothermal stability. Under solar irradiation, both surfaces facilitate rapid melting of saline ice droplets. Notably, the photothermal slippery surface achieves superior ice-melting performance, reducing melting times by 35% to 62% for NaCl droplets with varying concentrations compared to the photothermal superhydrophobic surface. An analysis of melting times revealed that as the initial NaCl concentration increases, the ice crystal content in frozen droplets decreases, leading to progressively shorter melting durations. Furthermore, a comparison of the photothermal deicing performance of two inclined surfaces under illumination demonstrated that the lubricating layer on the photothermal slippery surface facilitated the formation of liquid-liquid contact, thereby enhancing the deicing efficiency for brine ice droplets. Ice droplets on the photothermal slippery surface began to slide off within 15 s of the melting process, even before complete melting, significantly outperforming the photothermal superhydrophobic surface in deicing efficiency. This study provides valuable insights into the application of photothermal superhydrophobic and slippery surfaces for seawater deicing, offering foundational guidance for addressing sea spray icing challenges in maritime and offshore environments.