How bees keep cool in hot weather – Hot Days & Heavy Hives: Managing the Cape Summer
As temperatures in the Western Cape soar past 30°C, most of us are looking for the nearest pool. But have you stopped to think about what is happening inside a beehive and how bees keep cool in hot weather?
A beehive is a biological marvel. The internal temperature—specifically the brood nest—needs to stay at a precise 34°C to 35°C. If it gets hotter, the wax combs can soften and collapse.
So, how do thousands of tiny insects in a wooden box survive a Cape Town scorcher without an electric fan? And more importantly, what should you be doing to help them?
The Bee Beard: Hanging on the Stoep
You might have walked past a hive on a hot afternoon and seen a massive cluster of bees hanging off the front entrance. Don’t panic. This is called “bearding.”Just as you might step out onto the balcony to get some fresh air, bees leave the hive to reduce the internal body heat and clear the “hallways” so air can circulate better inside. They are simply hanging out on the front stoep to cool down.
Nature’s Air Conditioning (Check Your Equipment!)
Inside the box, worker bees engage in active ventilation, beating their wings to pull hot air out.
Think Inside The Box: If you notice your bees struggling, ensure your hive equipment is up to scratch. Are your floorboards clear? Debris blocks airflow. Effective management means ensuring the hive environment allows the bees to do their job.
Water Foragers
When the mercury spikes, foragers stop looking for nectar and start hunting for water. They spread droplets over the brood comb, and “fanning” bees turn it into an evaporative cooling system.
How You Can Help: You can create a simple Bee Water Station to save them energy:
- Take a shallow dish.
- Fill it with water.
- Crucial Step: Place pebbles or corks in the water. Bees need “landing pads” so they don’t drown.
The Eucalyptus Flow & Congestion
January in the Cape often means the Eucalyptus flow is on. While it’s hot, your bees might be bringing in heavy loads of nectar.
Is there congestion? You need to ensure there is sufficient space in your supers. If the brood box is congested with honey, the Queen has nowhere to lay, and the colony will struggle to regulate temperature or might even swarm.
Expert Tip: Uncapping honey on brood frames—specifically the arch between the top bar and the brood—or adding deep supers now can make all the difference. This encourages the bees to move that honey up into the super, clearing the way for the Queen.
A Note for the Beekeepers: Gear & Safety
Working bees in this heat is tough work. If you are heading out to your sites, Proper Preparation is key.
Hydration: Remember our golden rule for hot days: Put 500ml of water into a 2-litre bottle and freeze it, then fill it up before you leave. Always have cold water with you!
The Right Tool: In 30°C+ heat, propolis becomes incredibly sticky. You need a strong hive tool to pry apart boxes. Flimsy tools will bend or snap when trying to lift supers heavy with Eucalyptus honey.
Fire Safety (The Smoker): It is Fire Season. Be hyper-aware of your smoker. Ensure it is lit safely, never empty hot ash on site, and always extinguish it completely before you drive off.
Need a Hand?
If the idea of suiting up in 35-degree weather doesn’t appeal to you, or you are worried about site management during fire season, we are here to help.
At Barben Bees, we handle the heat, the inspections, and the heavy lifting. Contact us today to ensure your hives are ready for the season.
