PredictWind introduces Sail Crossover charts to take the guesswork out of sail changes

by Casey Hodges 25 Aug 13:19 BST 25 August 2025

PredictWind, a global leader in marine weather forecasting, has introduced a Sail Crossover Charts feature, a cutting-edge tool designed to help sailors make smarter, safer, and more efficient sail changes.

The tool translates complex performance data into a simple visual guide, showing when to change sails based on a boat's unique performance data, sail inventory, and the forecast conditions.

A Safer Way for Cruisers to Reef “Our goal was to create a tool that helps cruisers prioritise safety and comfort on any passage, while giving racers a crucial tactical advantage,” said PredictWind Founder, Jon Bilger. “Whether it's time to change a sail or put in a reef, you’ll get a clear idea of what change is needed and when, allowing you to plan ahead.”

This data-driven tool can make all the difference on a multi-day passage. Imagine when a sudden storm hits at 2 am with 35 knots of wind. Getting caught with too much sail up can easily lead to a chaotic and unsafe situation. Sail Crossover Charts aim to eliminate these challenges by telling a sailor when to reef or change sails, so they can make that crucial decision in daylight with a clear mind, not in the middle of the night.

Key Features of Sail Crossover Charts:

• Predefined Charts: Access over 1,000 sail crossover charts..
• Personalised Charts: Create a custom chart for your specific boat by editing your sail inventory if your boat isn't listed.
• Integrated Routing: View sail changes highlighted directly on the routing map to inform your passage plan.
• Customisation and Export: Easily edit, export, or print your charts for quick reference on the boat.

This niche feature is a result of PredictWind’s mission to provide the most accurate and reliable forecasts, equipping sailors with the data they need to optimise their performance and enhance their safety.

Sail Crossover Charts are a planning aid and should not replace a sailor's real-world observation and seamanship. They are integrated with PredictWind’s weather routing, accessible to Standard users and above. For more information, visit see this detailed article on how to use sail crossover charts..

About PredictWind

PredictWind is the world’s leading provider of marine weather forecasting solutions. Trusted by sailors and mariners worldwide, PredictWind’s technology combines advanced weather data with cutting-edge tools for accurate, reliable, and comprehensive marine weather information.