Sensual observations are all well and good, but there is also the landscape of the mind to consider. What associations do you make when you see/hear/feel/taste a scene? What makes that scene come alive in your mind? And above all, what does the scene mean and to whom? Remember that landscapes are like stages: they are inert until an actor strides out upon the boards.
Here is the opening paragraph from Joyce's "Two Gallants":
THE grey warm evening of August had descended upon the city and a mild warm air, a memory of summer, circulated in the streets. The streets, shuttered for the repose of Sunday, swarmed with a gaily coloured crowd. Like illumined pearls the lamps shone from the summits of their tall poles upon the living texture below which, changing shape and hue unceasingly, sent up into the warm grey evening air an unchanging unceasing murmur.
The whole evening has a persona; it is at once the stage and the actor upon that stage. The impression is both literal and figurative, the weather and the type of day have a personality, which interacts with the personality of the crowd. Joyce repeats the adjectives "warm" and "grey" and reverses their order, giving the impression of undulation, and this is reinforced with the alliteration of m (mild, memory, illumined, summits, murmur) and numerous sibilances (descended upon the city, streets ... shuttered ... Sunday, swarmed, etc.). This is not just a scene but an impression of a scene.
Here is another landscape, this one from a poem, "The Snow Man" by Wallace Stevens. Observe how evocative this scene is, how it draws a response from the reader simply by citing objects and connecting them to emotions.
One must have a mind of winter
To regard the frost and the boughs
Of the pine-trees crusted with snow;
And have been cold a long time
To behold the junipers shagged with ice,
The spruces rough in the distant glitter
Of the January sun; and not to think
Of any misery in the sound of the wind,
In the sound of a few leaves,
Which is the sound of the land
Full of the same wind
That is blowing in the same bare place
For the listener, who listens in the snow,
And, nothing himself, beholds
Nothing that is not there and the nothing that is.
Note the scant use of adjectives: a handful serve for the entire poem, yet the picture of isolation and desolation is complete and poignant. Who is the actor here? The listener, the observer, who becomes, finally, the reader.
Let's narrow the focus to a single room, with a scene from Arturo Perez-Reverte's The Club Dumas (translated by Sonia Soto):
She was asleep. He stretched out an arm, carefully so as not to wake her, and searched for a cigarette inside his coat. When it was lit, he propped himself up on an elbow and stared at her. She was on her back, naked, her head tilted back on the pillow spotted with dry blood, breathing gently through her half-open mouth. She still smelled of fever and warm flesh. In the glow from the bathroom, which traced her outline in light and shadow, Corso admired her perfect body ... He saw the pulse at her neck, the almost imperceptible beat of her heart, the gentle curve from her back to her waist, widening at the hips.
There are two actors here, one male and one female. There are scant few details about the room (a pillow spotted with blood, glow from the bathroom) but these are enough to paint a picture. The focus is confined to the actors, as if they were illuminated by a pencil spotlight, bringing them into sharp detail. The sleeping woman's body becomes the real landscape, and its texture is revealed through the impressions it makes on Corso's imagination.
The point I want to leave you with is that writing is about people, what they do and feel. Your example starts to get interesting when you bring on the actors and their conflicts: birds fighting fishermen for the catch of the day, the feeling of "hard labour" and "sad hugs" of those going to work upon the sea. I sense that you feel those things innately, but I want to make clear that those are the things that speak to the reader more than any bright aperçu you may make about boats and waves.
