
FCST – Sky & Sea Forecast
Professional weather forecast
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Free
Rating summary
About
FCST is a weather forecast for air sports, sailing and the mountains. We run our own models: WRF for all of Europe (5.4 km grid, ECMWF input), mountain wave on a 1.8 km grid over southern Poland, ICON-D2 over the Alps, and the Andes in Chile.
Pick your disciplines – the home screen shows 0–100 scores, the best time window and a short reason.
GLIDING
• Thermals: climb rate, cloud base, cloud cover, thunderstorm risk.
• Ridge lift from a terrain model and wave at several heights.
• Competitions from SoaringSpot: start window, route in AAT areas, conditions on each leg.
• Forecast files for XCSoar.
VFR FLYING
• Weather along the route at your ETA: ceiling, visibility, icing, thunderstorms, wind.
• Vertical cross-section of the route, METAR and TAF of airfields on the way.
• Suggested route around airspace and an OpenAIP airspace map.
IN-FLIGHT MAP
• Your glider or airplane on the forecast map, your track and the airspace at your altitude.
• Cross-section of the next 20 minutes: real terrain, cloud base, freezing level, rain, thermal top.
PARAGLIDING AND PPG
• Launch site scores: wind at launch and every 100 m up to the inversion, gradient, turbulence, thermals.
• Pilot profile adjusts the wind limits. Launch site database built by pilots.
BALLOON AND SKYDIVING
• Balloon: launch windows and predicted flight trajectories.
• Skydiving: wind at exit altitude and near the ground, jump hours for your drop zone.
SAILING
• Wind in knots and Beaufort, gusts, squalls, waves and currents.
• My voyage: weather along the voyage and the best departure time.
SKIING AND HIKING
• Ski resorts and ski tours: snow, weather, avalanche danger.
• My route: trails and weather at the real elevation of the route.
Also:
• 12-day weather forecast for any place and rain radar.
• Notifications of good and dangerous conditions at your places.
• Home screen widgets.
• Offline forecast maps – work without signal.
• "Who's coming" – see who is heading to the airfield or launch site.
• 6 languages: English, Polish, German, Czech, French, Italian.
Free: the weather forecast without limits, today's discipline forecasts and warnings. Premium (yearly subscription, 14 days free): the following days, any place, widgets with scores, alerts and offline maps.
Forecasts are a planning aid, and the in-flight map is not a navigation device. They do not replace official meteorological information, a briefing or your own assessment of the conditions.
Data: WRF (ECMWF), ICON-D2 (DWD), GFS (NOAA), Open-Meteo, Copernicus, OpenAIP, maps © OpenStreetMap.
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What's New in FCST
1.1
November 9, 2026
- Photos on the map: pictures of launch sites, airfields, marinas and trails from other users - User ideas: suggest new features and vote for them (Premium) - "Who is going" also for cities and your own location - VFR airplane: routes up to FL095, an "I may fly above the clouds" switch, clear messages about limits - Premium unlocks the next days right away for skiing, paragliding, skydiving and balloons
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