Australian Chill Hour Forecast – 10-Day Outlook
Daily-updated chill hour forecasts for all Australian states and territories, using the latest GFS model data.
If you grow fruit trees or vines in Australia, you already know that winter chill accumulation is critical for flowering and fruit set. This page provides a free, daily-updated 10-day chill hour forecast for all Australian states and territories, using the latest GFS temperature data to give you a clear picture of what’s ahead.
What These Maps Show
- ✅ Forecast chill hours accumulated over the next 10 days
- ✅ Based on Global Forecast System (GFS) model temperature projections
- ✅ Covers Tasmania, Victoria, New South Wales, Queensland, South Australia, Western Australia, Northern Territory, and the ACT
- ✅ Quick, visual reference for orchardists, vineyard managers, and growers
- ❌ Not adjusted for local station data or historical averages
- ❌ Not a replacement for in-orchard temperature logging or Bureau of Meteorology forecasts
Why Chill Hours Matter
Fruit crops such as apples, cherries, pears, plums, peaches, nectarines, and grapes require a certain number of winter chill hours to break dormancy and achieve healthy budburst. Insufficient winter chill can lead to poor flowering, uneven fruit set, and reduced yields.
How the Forecast Works
Data is sourced from the Global Forecast System (GFS) model, updated every morning. Chill hours are calculated when forecast temperatures are between 0°C and 7.2°C, summed over the next 10 days. This creates a state-by-state snapshot of projected chill accumulation, helping growers plan orchard management, pruning, and spraying schedules with more confidence.
Chill Hour Forecast Maps – All States and Territories
Click an image to enlarge.
