November marks the transition into the quieter beekeeping season in the San Francisco Bay Area. Temperatures are cooler, days are shorter, and nectar and pollen availability is much lower than during spring and summer.
However, our Mediterranean climate is very different from colder parts of the United States. Colonies in the Bay Area may remain active on warm days, and queens can continue maintaining some brood.
The priorities in November are therefore food reserves, Varroa control, colony strength and protection from winter rain.
1. Check Your Colony’s Food Reserves
By November, the main honey harvest should be long finished and the colony should have sufficient stores for winter.
Lift the hive from the back to get an idea of its weight. If a colony feels unusually light, inspect its food reserves and consider supplemental feeding.
In the Bay Area, winter starvation can occur even though our winters are relatively mild. Bees remain active during warm periods and continue consuming stores.
2. Monitor Varroa Before Winter
Varroa management remains one of the most important priorities going into winter.
A colony that enters winter with a high mite population is much more likely to become weak during the following months.
Monitor mite levels and make treatment decisions according to the actual infestation level, colony condition and the treatment method you use.
At Beeopic California, Varroa management is based on both treatment and genetics, including the use of Italian VSH queens.
3. Evaluate Colony Strength
November is a good time to identify colonies that are entering winter too weak.
Look at:
- the adult bee population;
- the amount and pattern of brood;
- food reserves;
- queen performance;
- signs of disease or excessive Varroa pressure.
A strong, healthy colony has a much better chance of developing rapidly when conditions improve again.
4. Prepare the Hive for Winter Rain
In the San Francisco Bay Area, moisture and rain are generally more relevant than extreme cold.
Make sure the hive is protected from direct water infiltration and that the equipment is in good condition.
I slightly tilt my hives forward so rainwater cannot accumulate inside and can drain toward the entrance.
At the same time, avoid excessive drafts through the colony.
5. Keep the Entrance Clear
Check that the hive entrance is not obstructed by dead bees, vegetation or debris.
An entrance reducer may be useful depending on colony strength and local conditions, particularly for weaker colonies.
6. Avoid Unnecessary Disturbance
As temperatures decline, inspections should become shorter and less frequent.
There is little reason to repeatedly open a healthy colony simply to check it.
Use warmer, calm days when an inspection is necessary and avoid keeping brood exposed to cool temperatures for long periods.
7. Start Thinking About Spring
November is also a good time to prepare for the next season.
Check your equipment, repair boxes and frames, and begin planning colony expansion, splits or new colonies for the following spring.
If you plan to start a new colony, remember that spring nucs in the Bay Area should generally be reserved well in advance.
November Beekeeping Priorities
For Bay Area beekeepers, November is not about preparing colonies for extreme winter temperatures.
The priorities are simpler: keep colonies healthy, well-fed, dry and under control for Varroa.
A strong colony entering winter is the foundation for rapid development when pollen and nectar become available again in late winter and early spring.