The Gulf of Khambhat, earlier known as the Gulf of Cambay is an inlet of the Arabian Sea along the west coast of India, in the state of Gujarat. The Narmada and the Tapti rivers evacuates into the Gulf. Stretching for about 80 miles the Gulf of Khambhat therefore ideally splits the Kathiawar peninsula. The Gulf is not very deep and has abundant shoals and sandbanks. The high tide of the Gulf varies in terms of height and races with great speed. During the low tide, the bottom is completely dry for some distance below the town of Khambhat.

Since ancient times the gulf has been an important commercial center. The ports join central India to the maritime trading activities of the Indian Ocean. The significant seaports on the Gulf are Bharuch, Surat, Khambhat, Bhavnagar and Daman. Khambhat was an important port in the Middle Ages but after the silting of the harbour, Surat rose to prominence as the most important harbour of the Munhall empire.