Yes, there are certain angles from which astronauts in orbit can see only water when looking at the Earth. This can occur when they are passing over large bodies of water, such as oceans or seas, and there are no landmasses or islands in their field of view.
From space, the Earth appears predominantly blue because about 70% of its surface is covered by water. When astronauts orbit the Earth, their perspective changes depending on their position relative to the planet's surface. If their orbit takes them over regions with extensive water bodies and no landmasses or islands are within their line of sight, they can observe an uninterrupted view of the vast expanse of water, giving the impression of seeing only water.
However, it's important to note that the exact view astronauts have from orbit depends on various factors such as their orbital trajectory, altitude, and the location and orientation of their spacecraft. Additionally, weather conditions, cloud cover, and the time of day can affect the visibility of land and water from space.