Beach Themed Decorations

decorations
(decorate) make more attractive by adding ornament, colour, etc.; "Decorate the room for the party"; "beautify yourself for the special day"
A thing that serves as an ornament
(decorate) award a mark of honor, such as a medal, to; "He was decorated for his services in the military"
(decorate) deck: be beautiful to look at; "Flowers adorned the tables everywhere"
Ornamentation
The process or art of decorating or adorning something

themed
Give a particular setting or ambience to (a venue or activity)
(Theming) Scenery and buildings that give a theme to a ride.
Theming is the "the use of an overarching theme, such as western, to create a holistic and integrated spatial organization of a consumer venue." Themes are usually derived from history, or other cultures, but can also be based on fantasy.
(Theming) The amount of props, effects, music, lighting, and background story used to theme an attraction. Very few rides are totally themed throughout, and as a result a rating of 5/10 is generally given to reflect the average value.

beach
an area of sand sloping down to the water of a sea or lake
A beach is a geological landform along the shoreline of an ocean, sea or lake. It usually consists of loose particles which are often composed of rock, such as sand, gravel, shingle, pebbles, waves or cobblestones.
A pebbly or sandy shore, esp. by the ocean between high- and low-water marks
land on a beach; "the ship beached near the port"