Nyssa, Idaho is a small town located in the southwestern part of the state. It experiences a continental climate with hot summers and cold winters. Summers are typically dry with temperatures reaching the mid-90s°F, while winters are cold with temperatures dropping to the mid-20s°F.

The hydrology in Nyssa is influenced by the nearby Snake River. The river provides a water source for irrigation as well as recreational activities such as fishing and boating. The surrounding area also features several creeks and canals that contribute to the local hydrology.

Outdoor recreation opportunities in Nyssa include fishing in the Snake River and nearby lakes, hiking and camping in the Owyhee Mountains, and birdwatching in the surrounding wetlands. The area's natural beauty and ample outdoor activities make it a great destination for nature enthusiasts and adventure seekers.