Agat Bay is a bay on the west coast of Guam

Guam

Guam is an organized, unincorporated territory of the United States located in the western Pacific Ocean. It is one of five U.S. territories with an established civilian government. Guam is listed as one of 16 Non-Self-Governing Territories by the Special Committee on Decolonization of the United...

. It is located immediately south of the Orote Peninsula

Orote Peninsula

The Orote Peninsula is a four kilometre-long peninsula jutting from the west coast of Guam. It forms the southern coast of Apra Harbor, and its westernmost tip, Point Udall, is also Guam's westernmost point...

, and stretches south past the village of Agat

Agat, Guam

Agat is a village on the island of Guam, an unincorporated territory of the United States. It is located south of Apra Harbor on the island's western shore. The village's population has decreased since the island's 2000 census....

 to Facpi Point

Facpi Point

Facpi Point is a headland in the southwest of the island of Guam. It is located three kilometers due west of Mount Lamlam, and five kilometers north of Umatac village. The point is listed as a National Natural Landmark....

. With a length of some seven kilometres, the bay stretches for nearly one fifth of the west coast of Guam. Gaan Point, located halfway along the bay just south of Agat, is the site of the US marine invasion of the island in World War II which saw Guam recaptured from the Japanese.

The northern part of the bay is protected by an offshore reef; further south is Nimitz Beach, a popular snorkeling spot containing the small offshore Anae Island.