Seascapes has always fascinated me!.I do not have a preferred vision for seascapes; I love both minimalistic and simple versions, as well as those highly dramatic ones full of action and movement. Here, I will share some of my tips on creating the latter.
Primarily, you have to stay safe around the sea. At many places I photograph, tall and powerful waves come with the package. Before even approaching, you should read the sea first. For dramatic seascapes, you often want to get close to the sea, which puts you in potential danger! Waves comes in waves, which means you often get 5-7 big waves followed by 5-7 small waves. Depending on where you are, the conditions and the patterns might be different. It is important to be able to foresee these patterns, as being close to the sea the waves can push you into razor sharp rocks, drag you out, or push something towards you. Icebergs or huge tree trunks can weigh several tons; you do not want to stand in the way of one of those.
The weather obviously plays a huge role. I prefer either golden hour light or stormy weather to get the most dramatic conditions. Shooting into the sun or having it to either side of your scene close to the horizon can get the waves and droplets lit up from behind, creating a beautiful and dramatic effect. This effect is strongly enhanced if the background is dark, such as a rock or cliff.
During midday, you can still get some interesting photos, although I usually stay away from that kind of light. If, however, you have a texture-rich, cloud-covered sky, this can add a lot of mood and drama to your photos. It also helps lowering the amount of ambient light and contrast in the scene.