Coastal Grandmother is a lifestyle and fashion microtrend that gained popularity in 2022. The aesthetic romanticizes the sophisticated, relaxed, and affluent lifestyle of a mature woman, as often depicted in the films of director Nancy Meyers. It is defined by a preference for timeless fashion, light and airy interior design, and hobbies centered on simple, elegant pleasures. The term is not limited by age, location, or whether one is actually a grandmother; rather, it describes an aspirational mindset focused on comfort, quality, and understated elegance.

While the visual and cultural elements of the aesthetic have existed for decades, the term "Coastal Grandmother" was coined by TikTok user Lex Nicoleta in a series of videos posted in early 2022. Nicoleta defined the aesthetic by referencing the style of characters in Nancy Meyers films, the domesticity of Ina Garten, and a general feeling of comfort and simple luxury. The term quickly went viral and was amplified by major fashion and lifestyle publications. Its popularity was further cemented by endorsements from celebrities who are considered icons of the style, including Diane Keaton and Anne Hathaway, transforming it from a niche TikTok trend into a mainstream cultural phenomenon.

The Coastal Grandmother fashion style is built on a foundation of timeless, high-quality, and comfortable pieces in a neutral color palette. Key garments include white button-down shirts, chunky knit sweaters often made of cashmere, wide-leg linen trousers, and elegant caftans. The emphasis is on breathable, natural fabrics and a relaxed, loose-fitting silhouette. Accessories are simple and classic, such as sun hats, leather sandals, and simple jewelry. The overall look projects an air of effortless sophistication and "quiet luxury."

The interior design associated with the aesthetic mirrors the fashion's principles. It is characterized by light, airy, and open spaces, often with a beach house or coastal feel. The decor features natural materials like wicker furniture, light-colored wood floors, and linen upholstery. Common elements include local pottery, fresh flowers in simple vases, scented candles, and high-end cookware, such as pieces from Le Creuset, displayed in an open kitchen.

The Coastal Grandmother aesthetic also encompasses a complete lifestyle. This lifestyle is a rejection of fast-paced, online-driven culture in favor of simple, tactile, and mindful pleasures. Associated activities include long walks on the beach, visiting local farmers' markets, gardening, and reading. A significant part of the lifestyle revolves around food and drink, with an emphasis on cooking with fresh, whole ingredients and an appreciation for good wine.

The musical sound of the aesthetic is often represented by "Coastal Grandmother" playlists on Spotify. The music is typically relaxed and sophisticated, featuring a mix of classic 1970s singer-songwriters like Carly Simon and James Taylor, as well as soul artists like Etta James and contemporary artists with a similar mellow feel, such as Norah Jones.