The Southwest Monsoon is a seasonal weather phenomenon that occurs in South Asia, particularly affecting countries like India, Bangladesh, and Pakistan. It typically begins in June and lasts until September, bringing heavy rainfall to the region. This monsoon is driven by the difference in temperature between the land and the ocean, causing moist air to flow from the Indian Ocean towards the land. The arrival of the Southwest Monsoon is crucial for agriculture, as it provides the necessary water for crops during the growing season. However, it can also lead to flooding and landslides in some areas, highlighting the need for effective management of water resources during this period.