Practical heatwave tips for Australian beekeepers
Heatwaves are becoming more common across Australia, and while honeybees are incredibly resilient, extreme and prolonged heat can place serious stress on a hive. For backyard and farm beekeepers alike, understanding how bees cope with hot weather, and how to support them, is essential for maintaining healthy colonies.
When temperatures climb well above average, bees work hard to keep the brood nest at a stable temperature of around 34–35°C. They do this by collecting water, spreading it through the hive, and fanning their wings to create evaporative cooling. This process takes energy and manpower away from foraging and honey production, so extended heat can weaken a colony if conditions aren’t supportive. Further, if you’ve experienced a true heatwave in Australia, where temperatures are over 40°C(!!) you could experience the disasterous full melt of a hive.
The good news is that a few simple steps can greatly improve your bees’ ability to cope during a heatwave.
Why Heatwaves Are Stressful for Bees
High temperatures can lead to:
- Overheating of brood
- Reduced foraging activity
- Increased water demand
- Higher risk of queen or brood damage
- Greater colony stress during drought conditions
The aim during a heatwave isn’t to constantly interfere with the hive, but to reduce environmental pressure and let the bees do what they do best.
Essential Heatwave Care for Beehives
1. Provide Reliable Access to Water
Water is critical for hive cooling. Bees may travel long distances to find it, which wastes energy during already stressful conditions.
Place shallow water sources close to your hives and add pebbles, gravel, or sticks to create safe landing areas. Refresh the water daily if possible, as it heats up quickly in extreme temperatures.
If your bees already use a trough, dam, or tank, make sure it doesn’t run dry during hot weather. Alternatively a sprinkler on very low will provide shallow puddles for bees to access the water they need.
2. Ensure Afternoon Shade
Morning sun helps hives get going early, but strong afternoon sun can rapidly overheat them.
Ideally, hives should be shaded during the hottest part of the day. Natural tree shade works best, but shade cloth, fencing panels, or temporary structures are effective alternatives. Even partial shade can significantly lower internal hive temperatures.
3. Improve Hive Ventilation
Good airflow helps hot air escape and supports the bees’ cooling efforts.
Options include:
- Using screened bottom boards
- Slightly tilting hives forward
- Raising hives off the ground
- Removing the bottom board tray during extreme heat
Always balance ventilation with security from pests and weather.
4. Avoid Hive Inspections During Heatwaves
Opening a hive during extreme heat releases trapped cool air and disrupts the brood environment.
Unless there’s an urgent issue, delay inspections until temperatures ease. Brood and queens are particularly vulnerable when exposed during hot weather.
5. Don’t Panic About Bearding
Bearding, when bees cluster outside the hive, is a normal cooling behaviour during hot conditions.
By moving outside, bees reduce congestion and heat inside the hive. As long as the bees are calm and settled, bearding is not a sign of trouble.
6. Plan for Long-Term Heat Resilience
With heatwaves becoming more frequent, long-term planning matters.
Consider hive placement, airflow, and year-round water access. Planting shelter trees or flowering natives can provide shade, wind protection, and forage. Strong colonies with good nutrition and genetics cope far better with extreme heat than stressed or underfed hives.
Beehive Heatwave Checklist
Before & During a Heatwave:
- ☐ Provide shallow water sources with safe landing spots
- ☐ Check water daily and top up as needed
- ☐ Ensure hives have afternoon shade
- ☐ Improve airflow (screened base, tilt hive, raise stand)
- ☐ Remove bottom board tray if safe to do so
- ☐ Avoid opening hives during extreme heat
- ☐ Expect and accept bearding behaviour
- ☐ Monitor from the outside, not inside
Final Thoughts
Bees have survived harsh Australian summers for generations. With thoughtful preparation, calm observation, and minimal interference, most healthy colonies will manage heatwaves well.
Supporting your bees through extreme weather isn’t about doing more, it’s about doing the right things at the right time.
