Why are isolated gulfs often good locations for harbours and seaports?

Isolated gulfs are often ideal locations for harbours and seaports because they provide natural protection for vessels. In these relatively enclosed bodies of water, waves from the open ocean either do not penetrate at all or are significantly reduced in size after entering, creating calmer conditions that are more navigable for ships.1

Because these areas offer shelter from the turbulent forces of the open sea, they have historically been preferred sites for maritime infrastructure. By providing a stable environment, gulfs allow ships to remain safely at anchor and facilitate the efficient transfer of goods between waterborne vessels and land-based transportation systems, such as trucks.123