Have a look at an asset pack for UE4 equipped with everything you need to build stylized low poly coast environments.
The assets of this pack have a wide range of possibilities, it fits a lot of environments in coast biomes, from paradisaical beaches to rocky cliffs, through Magle swamps and islands, all this while maintaining a harmonious stylized low poly, thanks to its simplicity.
Texture Size: All 2048×2048
Number of Textures: 7 (all used in the Grass and Ground Plants)
Collision: Yes, Per Poly Collisions
Vertex Count: 8 to 350
LODs: 0
Number of Meshes: 77
Number of Materials and Material Instances: 4 Master Materials, 26 Material Instances
Platforms Tested: PC