How Many Days Is Duck Incubation? Temperature, Humidity and Cooling Guide

The duck is the most-tried species after the chicken, thanks to its large eggs, hardy chicks and productive laying. But being waterfowl brings a few important differences from the chicken: a longer period, higher humidity and daily cooling-and-misting in the final stretch. In this guide we explain the duck egg's incubation period, temperature and humidity, turning and the waterfowl-specific details step by step.

If you've read our guide to hatching eggs in an incubator, which explains the general logic through the chicken, here we'll focus only on what's specific to ducks.

How Many Days Is Duck Incubation?

A duck egg hatches in 28 days. This is standard for the most common domestic ducks (Pekin and mallard-derived breeds). The exception is the Muscovy duck, whose period stretches to 35 days. It's a week longer than the chicken's 21 days, so it takes patience.

The period splits in two:

• Days 1–25: development period
• Days 26–28: hatch period

Temperature for Duck Incubation

The temperature values are very close to the chicken's:

• Forced-air (fan) machines: 37.4 – 37.6 °C
• Still-air (static) machines: 38.0 – 38.5 °C (measured at egg level)

Don't trust the machine's display — verify with an external digital thermometer.

Humidity for Duck Incubation

As waterfowl, the duck needs higher humidity than the chicken:

• Days 1–25 (development period): 55%–65%
• Days 26–28 (hatch period): 70%–80%

Still, just keeping humidity high isn't enough; the egg must lose water at the right rate (the air cell must grow). The way to ensure this is the next step: cooling and misting.

The Waterfowl Step: Cooling and Misting

In nature the mother duck leaves the nest for a while each day; the eggs cool and are dampened by the water in her feathers. Mimicking this in the machine noticeably raises the hatch rate:

• When: From about day 7-10 until the hatch period (up to day 25).
• How: Once a day, open the lid for 5-15 minutes to cool the eggs; then lightly mist them with lukewarm water and close it.
• Why: The duck egg's shell membrane is thick; this practice keeps the membrane from hardening too much and makes it easier for the duckling to get out.

Turning and Candling

• Turning: 3-5 times a day, an odd number. Stop turning at the end of day 25.
• Candling: on days 7, 14 and 25. Although the duck egg is larger and its shell thicker than the chicken's, the network of veins is usually visible; remove clear (empty) and non-developing eggs.

The Hatch Period (Last 3 Days)

From day 26:

1. Stop turning (at the end of day 25) and also stop the cooling-and-misting.
2. Raise humidity to 70-80%.
3. Don't open the lid. In this period, humidity loss makes the duckling stick to the shell.
4. Be patient. The duckling hatches more slowly than a chick; breaking the shell and getting out fully can take 24-48 hours. Don't intervene.

After Hatching: Niacin Is a Must

Ducklings are very prone to niacin (vitamin B3) deficiency on a standard starter feed; a deficiency causes leg weakness and developmental problems. Use niacin-supplemented feed. Also use a shallow, tip-proof drinker to prevent drowning — ducklings love water but get soaked and chilled easily.

The Most Common Mistakes

• Acting on the chicken calendar. Duck is 28 days, not 21, and turning stops on day 25, not 18.
• Skipping cooling and misting. For waterfowl this step seriously affects the hatch rate.
• Forgetting niacin. Standard chick feed is insufficient for ducks.

Because the duck's period and extra steps differ from the chicken's, it's critical to track which day you're on and when to stop turning and raise humidity. The Kuluçka Takip app automatically sets the right calendar for each species (chicken, duck, quail) and notifies you of turn-stop and hatch reminders. You can check out the app here.

Duck incubation, with its slightly longer period and waterfowl-specific steps, is the natural step to take after the chicken. Knowing the differences — the 28-day period, stopping turning on day 25, and cooling-and-misting — is the key to a successful hatch. For the general incubation principles, also see our chicken incubation guide.