EDIT Seas without tides?
Photo by Arby Reed.
Are there any seas on Earth that don’t have a noticeable tide?
All of Earth’s seas do have tides, thanks to the pull of the sun and moon.
The height of the tide depends on the size, shape, and depth of the sea in a given location. Some of the smallest tides occur near San Francisco, where the level of the Pacific Ocean might change by less than a foot throughout the day. In contrast, the Bay of Fundy – on the Atlantic Ocean – can rise more than fifty feet in only a few hours!
There are even tides in lakes as well as oceans, although lake tides are mostly overwhelmed by local wind.
Ocean tides follow a cycle that coincides with the “lunar day.” That’s the time it takes Earth to make one complete spin underneath the moon. The moon moves eastward in orbit around Earth. So that “lunar day” is longer than 24 hours. In fact, it’s 24 hours, 50 minutes long.
There are tides following this cycle everywhere on Earth, even in solid ground. But tides are noticeable mainly in water. And, in general, the larger the body of water the more noticeable the tide.
More resources on “oceans”…