RunFast

Your runs’ weather, on Strava.

Connect Strava to your free RunFast account, and every run you upload gets a short summary at the end of its description: what the heat, humidity, rain and wind did to it, at the times you actually ran each stretch.

Connect Strava in your account Compatible with Strava
TMThandi MokoenaToday at 06:02 · Fourways

Saturday long run

Distance21.1 kmPace5:42 /kmTime2:00:24
🌡️ The weather cost about 1 min 40 s on this run (heat and humidity, from km 9). Heat stress Moderate, WBGT up to 22°.
17–24°C, felt like 27° at running pace · Dew point 16° (sticky) · dry · wind 9 km/h
Run weather by RunFast · runfast.tech/strava · Apple Weather data

Upload as usual

From Garmin, Coros, Apple Watch, your phone or anything else. Within a minute of a run reaching Strava, its summary is added. Your own words are never changed.

As you really ran it

RunFast reads when you were on each stretch and asks Apple Weather for those hours and places, then works out what the weather cost you, the way Map your run does.

Bring your routes

Import your Strava routes and recent runs into RunFast, schedule them, and get each one’s forecast the evening before.

What RunFast does with Strava

  • It reads your runs (their type, times and GPS points) to work out their weather, writes one summary at the end of each description, and keeps nothing about the run afterwards.
  • Routes and runs you import stay private to you. They’re never shown on a club’s page or to anyone else.
  • Outdoor runs only: treadmill, virtual and manual activities are left alone, and a run gets its summary once.
  • Windline and RunFast connect to Strava as one app, livedot, so Strava’s screen says livedot. One connection serves both, and each writes only on its own sport: runs get RunFast’s weather, and rides get Windline’s wind only if you connect Windline too.
  • Disconnect any time in RunFast (Account → Connected apps) or in Strava (Settings → My Apps). The connection is deleted straight away.
  • Your Strava data is never used to train AI. Privacy