Why check weather along the route?
On a longer ride you can be hours and half a region away from the place your weather app checked.
This tool samples points along your route, works out when you'll reach each one at your average speed, and fetches the forecast for that place at that time. Wind is compared against your direction of travel at each point, so you can tell whether the exposed section is a grind or a push, and whether the loop rides better clockwise.
The clothing suggestion comes from the same engine as the Route Companion app. It accounts for the wind chill of riding speed (a mild forecast can feel cold at 30 km/h) and dresses you for the coldest stretch of the ride, not the average.
Common questions
Is my GPX file uploaded anywhere?
No. The file is parsed entirely in your browser. Only a handful of sampled coordinates are sent to the weather API to fetch forecasts. The route itself never leaves your device.
How is headwind or tailwind determined?
The tool computes your direction of travel at each sampled point and compares it with the forecast wind direction at your arrival time. Wind only counts as headwind or tailwind when the component along your travel direction is strong enough to feel. A light breeze reads as calm, exactly like in the app.
How far ahead can I check?
Up to 16 days, though useful accuracy drops beyond about a week. For rides further out, treat it as a trend check and look again the evening before.
Which file formats work?
GPX on the web tool. The app also imports TCX and FIT, and pulls routes directly from Strava, Komoot, Ride with GPS, and Garmin.
What should I wear at 10°C? At 5°C?
Load your route and the tool answers for your exact conditions. As a rule of thumb: at 10°C most cyclists want long sleeves, leg warmers, and light gloves; at 5°C add a thermal layer, winter gloves, and shoe covers. Wind and rain move those thresholds; the what-to-wear guide covers how.
In the app, this is part of every route.
Route Companion runs this check for each route you import, alongside fueling and stops along the way, and exports to your Garmin or Wahoo with the stops included.