Sauvignon Republic vineyards are located in the Wairau Valley.

It is one of two river valleys that make up New Zealand's Marlborough wine region. Most vineyards surround the town of Blenheim in the north-eastern corner of the South Island, near where the Wairau River meets the Pacific Ocean. Sauvignon Blanc is by far the most important grape variety planted here, producing distinctively aromatic white wines with flavors of gooseberry, passion fruit and fresh herbs.

The Wairau Valley is a wide river valley that follows the Wairau River from the Spenser Mountains in the west to the Pacific at Cloudy Bay. The Richmond Mountains in the north separate it from the sunny region of Nelson, and the Wither Hills in the south protect the valley from harsh weather systems from the south-east. 

The valley's soil profiles are the most distinct feature defining the character of wines produced here. Shallow, stony and fast-draining soil along the river terraces aid infertility, a condition which perfectly suits Sauvignon Blanc. Further from the river, in the hills, the soils have a higher proportion of clay and silt. These soils retain slightly more moisture for the vines, which leads to a more herbaceous character in the resultant wines.

Wairau Valley has a warm, dry climate that is moderated during the growing season by sea breezes from Cloudy Bay. Hot sunshine during the day and cold ocean winds at night extend the ripening period, leading to a balance of fruit complexity and acidity. This diurnal temperature variation is essential to the quality in the Wairau Valley.