Speedwell is a small unincorporated community located in Wythe County, Virginia. It experiences a humid subtropical climate, characterized by hot summers and mild winters. Summers are typically warm with average temperatures in the high 80s to low 90s Fahrenheit, while winters are generally mild with average temperatures ranging from the mid-20s to mid-40s Fahrenheit. Precipitation is relatively evenly distributed throughout the year, with an annual average of about 40 inches.

Hydrologically, Speedwell is surrounded by the New River Valley region, with the New River itself being a prominent feature. The New River is known for its excellent fishing opportunities, with an abundance of smallmouth bass, trout, and catfish. It also offers various water recreation activities like kayaking, canoeing, and tubing.

Speedwell and the surrounding area provide numerous outdoor recreation opportunities. The New River Trail State Park is a popular destination for hiking, biking, and horseback riding, offering scenic views of the river and surrounding landscapes. Additionally, the Jefferson National Forest, located nearby, provides opportunities for camping, hiking, fishing, and wildlife viewing. The region's natural beauty and diverse outdoor activities make Speedwell a great destination for nature enthusiasts and outdoor adventurers.