The best interior design ideas for beach houses revolve around the colors, textures, and accessories of the sea and the seashore. Bright sunny colors, rough sand-like textures, and interesting accessories that help to bring the outdoors inside are all essential elements to beach house design. Practicality, too, is important. Furnishings and textiles need to be sturdy enough to stand up to the salt air and wet bodies, as well as being attractive.