Introduction to WindRosePlot.app

WindRosePlot.app is a free, browser-based tool for turning wind measurements into clear, publication-ready wind rose diagrams. There is nothing to install and no account needed to start: enter your data, style the plot, and download it.

Your data stays private. Plots are drawn and image files are generated entirely on your own device, so the wind data you enter never leaves your browser.

What is a wind rose?

A wind rose summarizes how often the wind blows from each direction, and how strong it is, at a single location. Each spoke points to a compass direction, and the stacked colored segments along it show how frequently the wind fell into each speed range. A longer spoke means wind comes from that direction more often; the colors break that total down by speed.

Quick start

1. Enter your data in the table, one row per direction, or import a CSV.
2. Set your speed bins to match your data, either uniform ranges or custom breakpoints. See Configuring Bins.
3. Customize the directions, colors, and layout to taste.
4. Download your plot as a PNG or SVG. See Downloads.

What you can customize

• Directions into 4, 8, 16, or 36 sectors, with compass letters or degree labels.
• Speed bins as uniform ranges or your own custom breakpoints.
• Colors from a set of sequential and diverging D3 color schemes.
• Plot appearance: size, inner and outer radius, and a transparent background.
• Axes and grid: ticks, direction labels, the value axis, and grid lines.
• Legend: position, orientation, and spacing.

Downloads at a glance

Free users get 2 PNG downloads per week. A premium pass unlocks unlimited PNG and SVG exports with no watermark. See Downloads for the details and Pricing for pass options.