Our Climate

The Petaluma Gap AVA enjoys a mild Mediterranean climate characterized by warm, dry summers and cool, wet winters. At the western-most boundary of the Petaluma Gap, along the coastline, the Estero Lowlands and a series of low hills form the transport corridor that allows marine air to roar into the region.


A typical summer day in the Gap begins with a distinctive, crisp coolness and a blanket of morning fog. By late morning the sun chases away the fog and temperatures rise. By mid-afternoon, however, the cool, on-shore breezes begin, picking up speed as the afternoon progresses and bringing in fog almost every night. It is this cooling “wind tunnel” effect that distinguishes the Petaluma Gap from our neighboring winegrowing areas. The effect of the wind brings lower yields and grapes that reach physiological ripeness much later and at lower sugar levels, while developing wonderful flavors and fruit characteristics with ideal levels of acidity. The results are well-balanced wines, demonstrating character and distinction.