Every seafarer checks the weather. But most use basic apps that show you a sun or a cloud icon and a temperature. For actual route planning and operational decision-making, you need something far more capable. That tool is Windy.

Why Windy?

Windy is built by meteorology enthusiasts and used by pilots, sailors, surfers, and maritime professionals worldwide. It presents complex weather data in a visual, intuitive way that other tools simply cannot match.

Key features for seafarers

Wind visualization

The animated wind map is Windy's signature feature. You can see wind patterns globally, zoom into specific areas, and scrub through forecasts up to 10 days ahead. Colors indicate wind speed, arrows show direction. You can immediately spot developing storms, high-pressure systems, and calm windows.

Wave and swell data

This is critical for deck operations and cargo securing. Windy shows:

• Significant wave height
• Swell period and direction
• Wind waves vs swell (separated)
• Maximum wave height estimates

Multiple weather models

Windy gives you access to:

• ECMWF — European model, generally considered the most accurate globally
• GFS — American model, updated more frequently
• ICON — German model, excellent for European waters
• NAM — High-resolution North American model

Comparing models helps you assess forecast reliability. When models agree, confidence is high. When they diverge, be cautious.

Sea surface temperature

Important for engineers (cooling water intake) and for understanding weather development (warm water fuels tropical systems).

Air quality and visibility

Useful for port approaches and coastal navigation.

How I use it daily

1. Voyage planning: Check weather along the planned route for the next 5-7 days. Identify potential rough weather windows.

1. Cargo operations: Before deck work, check wind and wave forecasts. Operations in 20+ knot winds or 2m+ seas usually need additional precautions.

1. Port approach: Check visibility, wind direction and speed for berthing preparation.

1. Crew change planning: Weather can delay crew changes. Monitoring forecasts helps manage expectations.

Free vs Premium ($20/year)

Free gives you 90% of what you need. Premium adds:

• More weather models
• Point forecasts with detailed graphs
• Distance measurement tool
• Offline access
• No ads

For $20/year, the premium version is excellent value for a professional tool.

Pro tips

• Bookmark your regular routes as favorites
• Use the "Compare" feature to see how different models predict the same event
• The webcam overlay shows real-time conditions at many ports
• Layer combination: try wind + waves + rain together for a complete picture

Windy is not just an app — it is a professional decision-support tool. Every officer should know how to use it.