BOM: April to June 2026 Rainfall Outlook

Why It Matters

Reduced rainfall threatens water supplies, crop yields and hydro‑electric generation, while hotter temperatures increase heat stress and energy demand, amplifying economic and environmental risks nationwide.

Key Takeaways

• Below‑average April‑June rainfall across most of Australia.
• Far northern Queensland may see above‑average rains.
• Murray‑Darling Basin faces >50% chance of very low rainfall.
• Above‑average maximum temperatures likely nationwide (>80% chance).
• Unusually high minimum temps expected in western and coastal regions.

Pulse Analysis

The latest BOM outlook underscores a looming water deficit for key agricultural zones. Below‑average rainfall across the continent, especially in the Murray‑Darling Basin, could curtail grain sowing windows and strain irrigation reservoirs already running low after a dry summer. Farmers may need to pivot to drought‑tolerant crops or rely on supplemental water purchases, driving up production costs and potentially tightening food prices domestically and in export markets.

Concurrently, the temperature forecast paints a picture of heightened heat exposure. With an over‑80 % chance of above‑average maximums and a strong likelihood of unusually warm nights, energy utilities anticipate surging demand for cooling, while outdoor workers face increased heat‑related health risks. Ecosystems, from the Great Barrier Reef’s catchments to southern temperate forests, could experience accelerated stress, influencing biodiversity and fire regimes. These thermal trends also exacerbate evapotranspiration, further depleting soil moisture and compounding the rainfall shortfall.

In the broader climate context, the outlook’s mention of a possible El Niño transition adds uncertainty to seasonal planning. Historical data link El Niño events with intensified droughts in eastern Australia, suggesting that the 2026 winter could be more volatile than models currently capture. Policymakers and water managers will need to integrate these probabilistic forecasts into adaptive strategies, emphasizing reservoir management, demand‑side conservation, and resilient agricultural practices to mitigate the combined threats of dryness and heat.