Here in Coastal NC I see boats on a daily basis. I often cross the Cape Fear River and look down at barges, yachts, sailboats and paddleboards. The beach is close too. Every day, and every hour the beach changes. The clouds move across the sky and shadows move with it. Even the waves and the color of the water varies.
I try to see as much color as I can. (It took me a long time to develop this skill.) You'll see many splashes of color in the water, the sand, the waves. It is always near the end of the painting when I am most loosened up and can just throw in the color.