Climate Change and Olive Oil Production

Climate change represents the most significant long-term structural risk to Mediterranean olive oil production. The harvest failures of 2023–2025 were a preview of what increasingly frequent climate disruptions could mean for global supply and prices.

How Climate Affects Olive Production

Olive trees are remarkably drought-tolerant compared to most agricultural crops — they evolved in the Mediterranean climate of hot, dry summers and mild, wet winters. However, there are limits to this tolerance, and those limits are being tested.

Summer heat stress during fruit development (July–September) can reduce oil content and accelerate ripening in ways that harm quality. Extreme heat events (above 40°C for multiple consecutive days) can cause significant yield loss.

Winter chilling requirements for flowering are a less-understood risk. Olive trees need a certain number of hours below 10°C to stimulate flowering. Warmer winters in some regions are beginning to disrupt this requirement.

Spring rainfall patterns during flowering (April–June) critically affect fruit set. Both drought stress and excessive rainfall during flowering can reduce crop load.

Drought-induced biennial bearing — the tendency to alternate heavy and light crops — is being exacerbated by water stress. Consecutive drought years can permanently reduce tree productivity.

Producer Adaptation Strategies

The Mediterranean olive sector is responding through several strategies: investment in drip irrigation systems (reducing water use by 30–50% versus flood irrigation), shift toward more drought-resistant varieties, super-intensive planting systems that reach production faster and allow economic replanting, and adaptation of harvest windows.

Implications for Prices

If climate disruptions continue to cause supply volatility — as most climate models project — olive oil price volatility will increase over the coming decades. Producers and buyers with the most resilient supply chains will be best positioned.