Also known as Winter Surcharge (WS) or Ice Surcharge, is an extra fee applied by shipping lines to offset the increased operational costs of servicing specific ports during severe winter weather.

Ocean carriers pass these seasonal costs to shippers to cover specific winter-related expenses.

• Icebreaking Operations: Cost of hiring icebreaking vessels to clear paths into frozen waterways.
• Vessel Defrosting: Specialized heating, steaming, and de-icing equipment required to keep ship mechanics and decks functional.
• Port Delays & Extended Waiting: Slower vessel turnaround times and prolonged stays at the berth due to freezing conditions.
• Increased Fuel Consumption: Navigating through ice or shifting routes to avoid frozen areas burns significantly more fuel.

Affected Regions and Surcharge Windows

This surcharge is highly regional and typically active from December 1 through April 30 of the following year. The most common regions subject to winter surcharges include:

• The Baltic Sea: Major ports in Scandinavia, Finland, Estonia, and northern Europe.
• Russia: Historically prominent at northern hubs like the Port of St. Petersburg and Ust-Luga.
• Eastern Canada: Ports along St. Lawrence River and the Great Lakes network (e.g., Montreal).
• Northeast Asia: Inland and northern ports in northern China and eastern Russia.

Pricing Structure

Winter surcharges are typically billed on a per-container basis (TEU/FEU) and apply to both dry and refrigerated (reefer) cargo. Rates are heavily dependent on the carrier and the severity of the port conditions, but historical baselines range from $25 to $100+ per TEU. Major global lines adjust these rates annually based on real-time winter forecasts.