PredictWind provides several ways to view past weather information, depending on whether you want to review a previous forecast, actual observed conditions, historical weather data for a location, or long-term climate averages.
Forecast Replay: View Past Forecast Data
Forecast Replay allows you to go back up to 3 months and review past forecast data on the weather map. Use the time slider to select a specific day and hour and step through the forecast at hourly intervals. This is useful if you want to look back at the weather forecast for a particular time or see how conditions developed. Full details can be found at how-to-use-forecast-replay-on-the-website
Observations: View Actual Wind Observations
Observations displays actual wind data reported by weather stations for the previous 48 hours. You can move through the timeline to compare observed wind conditions at different times and locations. See how-to-use-wind-observations
Local Knowledge: View Historical Weather Data for a Location
Use Local Knowledge in the PredictWind App or Forecast Website to view historical weather data for locations around the world. This is a useful option if you want to understand the historical weather conditions for a particular area.
For instructions on how to access and use this information, see our Historical Weather Data help article and tutorial.
Climate Data: View 10-Year Wind and Wave Averages
PredictWind's Climate Data provides Wind and Wave Roses based on a rolling 10-year average of wind and wave conditions. Wind and Wave Roses are comparable to the information traditionally provided by Pilot Charts, giving you a visual overview of the typical wind and wave conditions for a particular area and time of year.
This is particularly useful when planning a passage or deciding on the best time of year to sail in a particular region. For more information see how-to-use-climate-data-on-the-predictwind-website
Which option should I use?
Use Forecast Replay to review past forecast data from the last 3 months, Observations to see actual wind observations from the last 48 hours, Local Knowledge to explore historical weather data for a particular location, or Climate Data to review rolling 10-year wind and wave averages.