A Bluegrass Pastoral Pty Ltd Product
SprayCast
Stop guessing when to spray.
Know your best window — 7 days out, down to the hour.
Stop guessing when to spray.
Know your best window — 7 days out, down to the hour.
SprayCast is a spray forecast and record-keeping tool for farmers. It analyses weather conditions across the next 7 days and tells you when your spraying window is — before you even start planning.
Wind speed, wind direction, temperature, humidity, Delta T, rainfall probability — all the conditions that matter for effective and compliant spray application, rolled into one clear recommendation.
Available in Australia, New Zealand, USA, Canada and UK — with more countries coming. Your closest weather station, your actual conditions.
See spray conditions across the full week ahead so you can plan spray runs in advance, not scramble at the last minute. Each day is scored green, amber or red based on wind, temperature, humidity, Delta T and rain risk.
SprayCast's algorithm analyses the full 7-day forecast and highlights your single best window to spray. Every condition is weighted and scored — the result is one clear recommendation.
Drill into any day and see conditions hour by hour — so you know exactly when to load up and when to hold off. Paid plan.
Australia uses the WillyWeather BOM network. New Zealand, USA, Canada and UK are powered by Open-Meteo. More countries coming.
SprayCast doesn't just show you a weather forecast. It analyses the conditions and tells you when to go.
Live forecast data from your chosen location. Australian stations use the WillyWeather BOM network. New Zealand, USA, Canada and UK use Open-Meteo high-resolution global data.
Wind speed, wind direction, temperature, humidity, Delta T and rain probability are all weighted to score spray suitability across every period of the forecast.
The algorithm identifies the single optimal spray window in the next 7 days — the period where conditions best line up for effective, on-label application.
On the paid plan, drill into any day for a full 24-hour breakdown — wind, temperature, humidity and Delta T charted hour by hour.
Too fast and you're drifting onto neighbours. Too calm and inversion conditions can carry spray unpredictably. SprayCast flags the sweet spot.
Know which way the breeze is heading before you start. Critical for paddocks near sensitive areas, waterways or neighbours.
High temperatures affect product efficacy and increase volatilisation risk. SprayCast shows you when temps are inside the label range.
Low humidity speeds drying and can reduce uptake. High humidity helps some products. The forecast shows where humidity sits across every hour.
Spray before rain and you've wasted product and time. SprayCast flags rain risk across the full 7-day window so you never get caught out.
Delta T is the key indicator of spray droplet evaporation risk. SprayCast calculates and displays Delta T so you know if conditions are ideal, marginal or unsuitable.
7-day free trial included. No credit card required to start.
Get started with the 7-day spray forecast summary and optimal window recommendation — no sign-up required.
The full picture — every tool you need to spray smarter, log accurately and stay compliant.
Free for the 7-day forecast summary. $50 a year for the full hourly breakdown, job log, calculators and PDF reports.