Speed Weather
Race-day weather intelligence for drivers who chase the perfect run.
Most weather apps tell you the temperature. Speed Weather tells you what the weather means for your car — whether the air will make power today, how it stacks up against your best, and exactly when to run.
What It Does
Speed Weather turns raw conditions into the numbers that actually move your e.t. and lap times. It runs live weather through real motorsport physics — air density, density altitude, humidity, pressure, wind, and dew point — and gives you a single Speed Index (0–100) for how fast the air is right now. Add a live NEXRAD radar, track-drying timelines, surface-temp trends, a per-vehicle Garage, and a camera time-slip scanner, and you've got a race engineer in your pocket.
Why Racers Use It
Every number a racer needs, in one app
Speed Index (0–100)
One clear read on today’s air, tuned to your build.
AI Crew Chief
A plain-language briefing: today’s HP impact, your best run window, and why.
Air Density & Density Altitude
The metrics tuners trust, calculated for you.
Live Radar
Full-screen NEXRAD with Local / Regional / Wide zoom and an intensity legend.
Track Drying
When a wet track will be raceable again.
Surface-Temp Trend
An estimated read on how the track is heating or cooling.
Hourly & 7-Day Forecasts
With an optional “Best Days” ranking for your vehicle.
Your Garage
Per-vehicle setup so every number reflects your car.
Run Log + Time-Slip Scanner
Record passes with the exact weather; snap a slip to auto-fill.
Track Database
Marquee U.S. strips, road courses, and ovals, plus regional venues — all editable.
Pricing
Free to start. Pro when you're ready.
Free
Everything you need race day
- Speed Index & AI Crew Chief
- Air density / density altitude / corrected HP
- Full live data strip
- Hourly & 7-day forecasts
- Race HQ with live radar
- One vehicle profile
- Track database
Speed Weather Pro
For serious competitors
- Multiple vehicle profiles
- "Best Track Near Me"
- Head-to-head track comparison
- Time-slip scanning
- Run history with PB trends
- Density altitude vs. ET trends
$1.99/mo or $9.99/yr — each with a 7-day free trial
Lifetime unlock: $29.99
Built on real data
Speed Weather uses the U.S. National Weather Service and other public sources, plus topographic elevation. Every estimate is shown as ranges and confidence levels, clearly marked “estimated, not measured.” It won't pretend to know your exact track temperature or dyno number — it gives you a credible read you can trust.
Live weather coverage is currently U.S. only.
No account required. Speed Weather runs on-device; we don't operate servers that store your personal data.
A Speed, Inc. app, powered by TapTap Performance.