Seasonal Guide · Updated 2026
Winterizing Your Hive: The Complete Fall Prep Checklist
Colony losses happen in winter but they're decided in fall. Here's what to do in September and October to give your bees the best shot at spring.
THE TWO KILLERS
Colonies don't die from cold. They die from moisture and starvation. A dry hive with adequate stores can survive subzero temperatures. A wet hive with plenty of honey will still die. Everything on this checklist addresses one or both of these threats.
When to Start (Don't Wait Until November)
Winter prep happens in September and October. By November, you should be hands-off — the cluster is forming and every hive opening costs them heat. Here's the timeline:
EARLY SEPTEMBER
Final varroa mite treatment. Assess honey stores. Remove queen excluders. Pull any remaining honey supers. Begin fall feeding if stores are light.
LATE SEPTEMBER — OCTOBER
Install mouse guards. Reduce entrance. Add moisture management (quilt box or moisture board). Combine weak colonies. Apply insulation wraps if in your climate zone.
NOVEMBER — MARCH
Hands off. Heft the hive periodically to check weight (don't open it). Add a candy board or fondant in January if it feels light. Clear snow from entrances.
The Winterization Checklist
1. Final Varroa Mite Treatment
The bees your queen raises in September and October are the bees that must survive until March. If those bees are parasitized by varroa, they'll be weakened and short-lived. Treat in early September — this is the single most impactful thing you can do for winter survival.
See our full varroa treatment guide for options. For fall treatment specifically, Apivar strips (6–8 weeks) or oxalic acid vaporization (3 rounds) are the top choices.
See Apivar strips →2. Check Honey Stores (and Feed If Needed)
A colony needs 60–90 pounds of honey to survive a northern winter (less in the south — 40–60 lbs). A full deep frame holds about 8 lbs of honey; a full medium frame about 5 lbs. Heft the back of the hive — with practice, you can estimate weight by feel.
If stores are light, feed 2:1 sugar syrup (2 parts sugar, 1 part water by weight) in September and early October while bees can still process it. Switch to candy boards or fondant once temps drop below 50°F — bees can't dehydrate syrup when it's cold.
3. Install Mouse Guards
Mice love beehives in winter — they're warm, dry, and full of food. A mouse can destroy comb and stress a cluster enough to kill the colony. A metal mouse guard over the entrance is cheap, easy, and essential. The holes are large enough for bees but too small for mice. Install in October before the first hard frost.
See mouse guards →4. Reduce the Entrance
A full-width entrance is too much space for a shrinking winter cluster to defend. Use your entrance reducer set to the smallest opening. This helps with temperature regulation, prevents robbing from yellow jackets and other colonies, and makes guard duty easier for fewer bees. Most hive kits come with one; if you've lost yours, replacements are a couple dollars.
See entrance reducers →5. Moisture Management (The #1 Winter Killer)
Bees generate moisture as they metabolize honey. In a sealed hive, this moisture rises, condenses on the cold inner cover, and drips ice-cold water onto the cluster. Wet bees in winter = dead bees.
Two solutions:
Moisture quilt box — A shallow box filled with wood shavings or burlap, placed on top of the hive. Absorbs rising moisture and lets it wick out through a ventilated top. This is the gold standard. See moisture quilt boxes →
Upper ventilation — At minimum, prop your inner cover up slightly with a small stick or popsicle stick to create a gap for moist air to escape. Less effective than a quilt box but better than nothing.
6. Insulation Wraps (Climate-Dependent)
In USDA zones 5 and colder (sustained temps below 0°F), hive wraps provide meaningful insulation that helps colonies conserve energy. In zones 6–7, they're optional — helpful but not critical. In zone 8+, skip them entirely — wraps can cause overheating and encourage the queen to start laying too early.
Bee Cozy and similar wraps are the easiest — they slip over the hive like a sleeve. Black material absorbs solar heat during the day, which helps in cold climates.
See hive wraps →7. Windbreak & Hive Placement
Wind is a heat thief. If your hive is exposed to prevailing winter winds, set up a windbreak — hay bales, a fence panel, or evergreen shrubs work. Position the hive entrance facing south or southeast to catch morning sun, which encourages earlier cleansing flights on warm winter days.
Also: tilt the hive slightly forward (a small shim under the back) so any condensation that forms drains toward the entrance instead of pooling on the bottom board.
❄️ The Winter Prep Kit
Total winter prep: ~$120 · Small price for colony survival
Made it through winter? Time to check for a queen. See our queenless hive detection guide for your first spring inspection.