Three wooden boats float closely side by side in the foreground, their pale hulls catching the sunlight as they rest on the rippling water of the port. To the left, a smaller green boat sits partially in shadow, its red underside just visible beneath the waterline. The water’s surface is alive with reflections, painted in broad, loose strokes of blue, green, and gold, echoing the movement and light of the harbor.

Behind the cluster of boats, the dock stretches horizontally, separating the moored vessels from the rest of the port. On the right, a red and black steamship is docked, its smokestacks rising above the pier and its hull rendered in thick, energetic brushwork. The pier itself forms a vertical edge along the right side of the canvas, its ochre and beige tones contrasting with the cool hues of the water below.

In the background, sunlight washes over the far quay, illuminating a distant figure in a small white boat and casting a golden glow across the upper left of the scene. The composition is carefully balanced, with the boats forming a strong central axis and the reflections leading the eye through the painting. Sorolla’s brushwork is fluid and expressive, with visible strokes that suggest both the texture of the wooden boats and the shimmering quality of the water.

Touches of white and yellow heighten the effect of sunlight, while deeper blues and greens anchor the shadows beneath the boats. A signature and the date '1910' appear in the lower left corner, confirming the artist and year of creation. Puerto de Guetaria, País Vasco (The Basque Port of Guetaria) is painted by Joaquín Sorolla in 1910.