What is Active sky?

Available for several simulator platforms, Active Sky offers many features for discerning sim pilots
Advanced Realism-Based Weather

Made by pilots, weather enthusiasts and aviation fans, Active Sky is designed to provide the most comprehensive and realistic weather experience for desktop flight simulation.

Global high-fidelity weather data

Using METAR, TAF, SIGMET, AIRMET, Global air model data, tropical storm data, snow depth data and more, with advanced weather data synthesis and interpretation.

Historical Weather with Playback

Dynamically changing historical weather according to real historical temporal changes is available in hourly archives.

Air Effects, Weather tools and more

Turbulences, drafts, gusts, mapping, planning, briefing, voice features, scenarios, comprehensive API, mobile web companion app, customizable options and much more is included!

Choose your Product

Active Sky weather engine products are custom-designed for each simulator

Active Sky FS

For MSFS PC (2020)


  • Now Available!
  • Designed specifically for MSFS
  • Active Air Effects
  • Multiple Depiction Options
  • Advanced Historical Weather with Playback
  • Requires MSFS PC version on Windows 10 or 11
Learn more

Active Sky XP 12

For X-Plane 12


  • Designed for XP12
  • Active Air Effects
  • Advanced Historical Weather with Playback
  • Requires X-Plane 12.04 or later
  • Requires Windows 7+ x64
  • Advanced Weather for X-Plane 12!
Learn more

ActiveSky P3D

Wx Engine for P3Dv5 and P3Dv4!


  • Supports P3D v4.5 HF3+ and P3D v5.0 HF2+ (includes 5.1, 5.2, 5.3, 5.4 with latest hotfixes)
  • Includes Volumetric Cloud Integration Features (check details for limitations)
  • Includes Advanced Radar, Air Effects and more
  • Comprehensive Localized Weather Areas
Learn more

Active Sky P3D v6

Latest Wx Engine for P3Dv6!


  • For the Latest Version of the P3D Simulator
  • Integrates with Prepar3D v6's New Atmospheric Engine
  • Compatible with Volumetric and Legacy Clouds
  • Includes Radar for Legacy Clouds
  • Advanced Weather for Prepar3D v6!
Learn more

Active Sky XP

HiFi's weather engine for X-Plane 11


  • Air Effects Including Turbulence and more
  • Requires X-Plane 11.26 or later
  • Requires Windows 7 or later, 64-bit
  • Comprehensive, Advanced Weather for X-Plane 11 PC 64 bit
Learn more

Active Sky Cloud Art

For FSX and P3D v3, v4, v5 and v6


  • Real-Time Texture Dynamics with AS
  • Realistic Cloud and Sky Textures
  • Brand new 3D Cloud Structures
  • Supports P3D v3, P3D v4, P3Dv5 (non EA-mode), P3D v6 (legacy clouds), FSX and FSX:SE
Learn more

AS16 for FSX

Previous Generation Wx Engine for FSX and FSX:SE


  • Compatible with FSX Boxed and FSX:Steam Edition
  • In-Cloud Motion Effects
  • XGauge Wx + Airborne Radar Simulation
  • Advanced Weather Engine for the FSX Platform
Learn more

Latest News


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About US

Refining Weather Accuracy and Realism since 2000!
Realism and function over everything else

Active Sky is a comprehensive weather simulation engine for X-Plane, Prepar3D, FSX and now the MSFS2020 flight simulator platforms. With over 24 years of innovative award-winning development, Active Sky continues its ongoing journey in an ongoing quest to improve the simulated aviation weather experience for everyone. HiFi is comprised of pilots, programmers and artists who share a common passion for aviation, weather and simulation. We strive for the most realistic weather experience possible, always prioritizing function and fidelity above all else. We love what we do and thank all our customers and supporters for enabling us to continue to improve and expand Active Sky!

  • Innovation

    We push the boundaries of what is possible

  • Integrity

    Our values include honesty, openness and collaboration

  • Customer Focused

    Our customers enable us to do what we love, and we do whatever we can to give them the best experience possible

  • Commitment

    We are committed to always improving our products, our company, and our customer service