Merrimac, Virginia is a picturesque town located in the northern part of the state. Known for its beautiful natural surroundings, Merrimac experiences a humid subtropical climate. Summers are hot and humid with temperatures ranging from the mid-80s to the low 90s (Fahrenheit), while winters are mild with average temperatures in the upper 30s to low 40s. The area receives a moderate amount of rainfall throughout the year, with the majority occurring during the summer months.

Hydrology plays a significant role in Merrimac's charm, as the town is situated near the scenic Merrimac River. The river is a notable hydrological feature, providing opportunities for water-based activities such as boating, fishing, and kayaking. Nature enthusiasts can explore the river's diverse ecosystem and observe various aquatic species.

Outdoor recreation opportunities abound in Merrimac. The town is surrounded by lush forests, making it an ideal destination for hiking, camping, and birdwatching. Additionally, there are several parks and nature reserves nearby, offering trails for walking or biking and picnic areas for relaxation. Merrimac is a nature lover's paradise, providing endless opportunities to explore the outdoors and enjoy its natural beauty.