When Do Bears Come Out of Hibernation in New Jersey? What You Need to Know
April 14, 2026
New Jersey may be the most densely populated state in the country, but it is also home to one of the most robust black bear populations on the East Coast. Every spring, as temperatures rise and snow melts, these powerful animals leave their winter dens and begin moving through forests, neighborhoods, and backyards in search of food.
If you live in or visit the Garden State, understanding when bears become active — and how to respond — is one of the most practical things you can do for your own safety and for the well-being of these animals. This guide walks you through everything you need to know about New Jersey’s bear season, from when they den to when they emerge and where you’re most likely to encounter them.
When Do Bears Hibernate in New Jersey
The short answer is that bears in New Jersey do not truly hibernate — but they do enter a period of winter dormancy that looks a lot like it. Black bears are not true hibernators and may be active all year long. During the winter, black bears enter a state of winter dormancy called torpor. Understanding this distinction matters, because it affects when and how often you might encounter a bear during the colder months.
Torpor is not the same as hibernation. Hibernation is voluntary and — depending on the species — can last for weeks or months. Torpor is involuntary, shorter, and allows animals to wake up if the need arises. In other words, a bear in torpor can rouse itself if disturbed, if it senses food, or if the weather turns unusually warm.
Starting in December, males and non-pregnant females retreat to their dens to enter a state of dormancy called torpor. Pregnant females will typically have entered their dens around the end of October. Den sites are carefully chosen for seclusion. The bears will make a den someplace secluded where they will not be found or disturbed, such as hollow trees, small caves, large excavations under roots of a tree, or the side of a dirt hill. Rugged terrain and dense shrubs provide escape cover and optimal den sites.
Pro Tip: Because bears can wake during mild winter spells, don’t assume you’re in the clear just because it’s January or February. Black bears in New Jersey will stay active all winter long if there’s abundant food available.
While in the state of torpor, their heart rate and respiratory rate slow and their body temperature slightly drops, but not as much as in true hibernators such as chipmunks or woodchucks. Black bears typically do not urinate or defecate while in torpor. They survive entirely on fat reserves built up during the fall feeding frenzy. They will need fifty to sixty pounds of fat to sustain them through the winter months.
When Do Bears Come Out of Hibernation in New Jersey
Spring is when bear activity picks up significantly across the state. Come March and April, black bears will begin to emerge from their dens to climb, swim, and romp throughout all of New Jersey’s 21 counties. The exact timing can vary depending on temperature, food availability, and whether a bear is a nursing mother or a solitary male.
With the onset of spring, black bears are actively foraging for food and may wander into neighborhoods in search of an easy meal. The New Jersey Department of Environmental Protection reminds residents to be bear aware by securing garbage and other potential food sources that can attract them.
Warm spells in late winter can also pull bears out of their dens earlier than expected. Sometimes unseasonably warm weather can fool them into thinking spring has arrived. If a bear emerges early, it simply begins its foraging cycle sooner — which is why early spring sightings are not uncommon in northern New Jersey even before March officially arrives.
Key Insight: If bears come out early and there’s a prolonged period between den emergence and vegetation, bears will get desperate for food. This is when they are most likely to wander into residential areas looking for easy calories.
Mothers with cubs follow a slightly different timeline. In mid-January, pregnant female black bears will awaken from their torpid state to give birth. A black bear sow births an average of 3 cubs, and by April they are ready to leave the den. You may spot a mother and her cubs exploring together throughout the spring and into summer as the young bears learn to forage.
For comparison, bears in neighboring states follow similar spring timelines. You can read about when bears come out of hibernation in Massachusetts and when bears emerge in Connecticut to see how regional patterns compare.
Which Bear Species Are Found in New Jersey
New Jersey is home to exactly one bear species: the American black bear (Ursus americanus). Despite the name, these bears are not always black in color. Black bears can be many different colors, ranging from brown to black. Most black bears in New Jersey are black, but there has been one documented black bear in the state that is cinnamon brown in color. About fifteen percent of New Jersey’s bears also have a white chest blaze.
In terms of size, New Jersey’s black bears are notably large. New Jersey’s adult male black bears, called boars, weigh on average 400 pounds, with a range from 150 pounds to over 600 pounds. Adult females, called sows, weigh on average 175 pounds, with a range from 150 pounds to over 400 pounds. Adult black bears are about 3 feet high when on all four paws and can range from 5 feet to 7 feet tall when standing.
| Feature | Adult Male (Boar) | Adult Female (Sow) |
|---|---|---|
| Average Weight | ~400 lbs | ~175 lbs |
| Weight Range | 150–600+ lbs | 150–400+ lbs |
| Height (on all fours) | ~3 feet | ~3 feet |
| Standing Height | 5–7 feet | 5–7 feet |
| Home Range | Larger, overlaps multiple sows | Less than 2 square miles |
The American black bear is the largest remaining native terrestrial mammal in New Jersey, and has been since the extirpation of native elk following European colonization. The population has grown dramatically in recent decades. From fewer than 100 bears in the 1970s, the population grew to approximately 500 by the early 1990s. Recent estimates indicate the population is over 3,000 bears, with projections suggesting it could exceed 4,000 by 2026.
If you’re curious about bear species beyond New Jersey, explore our guide to different types of bears found around the world, or learn more specifically about brown bears for a side-by-side comparison.
What Bears Do Immediately After Hibernation in New Jersey
When a black bear first leaves its den in spring, it does not immediately dive into a feast. When they emerge in the spring in a fairly groggy state, they don’t eat for about two to three weeks. Then they feed non-stop until September. This early post-den period is a transitional phase as the bear’s digestive system wakes back up.
When black bears emerge from their winter dens, they will primarily eat newly emergent skunk cabbage, grasses, forbs, tubers, bulbs, and insects. They may also feed on carrion, such as white-tailed deer carcasses. These early spring foods are easy to find and gentle on a stomach that has been dormant for months.
Key Insight: Black bears typically forage for early spring vegetation, like clovers and sedge, during the first two months after they emerge from their dens. As spring progresses into summer, their diet expands considerably.
With the onset of summer, black bears will consume more soft mast items, such as blueberries, raspberries, blackberries, and wild cherries. By fall, their diet will consist mostly of hard mast items, such as acorns, beechnuts, and hickory nuts. Throughout late summer and fall, black bears need to consume a minimum of 20,000 calories a day to prepare for the winter den season.
This relentless calorie-seeking behavior is what brings bears into conflict with people. As NJDEP Fish & Wildlife Assistant Commissioner Dave Golden explained, “Bears are on the move in early spring, searching for food after months in their dens. With their incredible sense of smell — detecting food over two miles away — they’ll head straight for unsecured garbage or pet food. Once they link people with an easy meal, the chances of unwanted run-ins go up.”
Black bears actively forage for food in the spring after they emerge from dens and in the fall when they are actively feeding to prepare for the winter den period. Black bears are also very active throughout the summer breeding season. These are the times of year when black bear and human encounters are most common, due to bears searching for food.
Bears in other states follow similar post-hibernation patterns. See how they compare by reading about bear emergence in Maryland or bear activity in Maine.
Bear Activity Hotspots to Watch in New Jersey
While bears have been confirmed in every corner of the state, activity is far from evenly distributed. New Jersey’s black bear population is most concentrated in the northwest counties of Sussex, Passaic, Warren, and Morris, but the range is expanding east and south as bear numbers grow. Even if you live outside of these hot spots, don’t assume you’re in the clear — bear encounters can happen anywhere in North Jersey, especially during the summer months.
Black bears live in mixed hardwood forests, dense swamps, and forested wetlands, and prefer areas with dense cover. In New Jersey, excellent bear habitat is found primarily within Sussex, Passaic, Warren, and Morris counties. However, as the bear population increases, black bears are expanding their range both east and south. Bear sightings have now been confirmed statewide.
Important Note: Most of the bear incidents reported in early spring have been in northern counties: 10 in Sussex, four in Passaic, three in Morris, and two in Warren. If you live in these areas, heightened awareness is especially important from March through late fall.
As the population grows, suburban encounters are becoming more common. Bear-human interactions are becoming more frequent — and not just in remote or rural areas. In Bergen County, sightings have been confirmed in towns like Paramus, Teaneck, New Milford, and Bogota, where residential neighborhoods border parks, wooded corridors, and waterways. These bears are often drawn by unsecured trash, pet food, bird feeders, or outdoor grills.
Parks, hiking trails, and campgrounds in northern New Jersey are also common encounter zones, particularly during spring and summer. In certain areas within the northwestern portion of the state, there are as many as three bears per square mile. Stokes State Forest, Delaware Water Gap National Recreation Area, High Point State Park, and Wawayanda State Park are all areas where bear sightings are regularly reported.
New Jersey’s bear activity patterns share similarities with other northeastern states. If you hike or camp across state lines, it’s worth reviewing bear activity in Massachusetts and when snakes come out in New Jersey — another seasonal wildlife consideration for outdoor enthusiasts.
How to Stay Safe During Bear Season in New Jersey
Staying safe around bears in New Jersey is less about avoiding the outdoors and more about being smart with food, waste, and your behavior when an encounter occurs. Black bears are typically not aggressive animals and tend to be wary of people. They do, however, engage in posturing to intimidate other animals and people when establishing dominance or when they feel threatened.
Securing Your Property
The single most effective thing you can do is eliminate food attractants around your home. Reducing the presence of trash in unsecured waste containers and other food sources, such as pet food, bird seed, or even small livestock, is essential because bears will learn to associate food with people and their homes and begin to forage in neighborhoods for food. These nuisance bears can cause property damage, approach humans for food, and become dangerous.
- Store all garbage in bear-resistant containers or inside a garage or shed
- Only place trash curbside on the morning of collection, not the night before
- Wash garbage containers regularly with disinfectant to reduce odors
- Remove outdoor pet food bowls after each feeding
- Clean barbecue grills thoroughly after use and store them inside when possible
- Take down bird feeders from spring through fall when bears are active
Intentionally feeding bears is illegal in New Jersey and carries a fine of up to $1,000. Even unintentional feeding — like leaving a bird feeder out — can habituate bears to human spaces and create dangerous situations over time.
Common Mistake: Many residents keep bird feeders up year-round without realizing they are one of the most common attractants for black bears in residential neighborhoods. Take feeders down by late March at the latest.
If You Encounter a Bear
Knowing how to react during a bear encounter can make a significant difference in the outcome. Make sure the bear has an escape route. Sometimes bears will “bluff charge” when cornered. Yell, bang pots, or use an airhorn to scare the bear away. If the bear will not leave, move to your house, car, or building if available.
If a bear sounds a series of huffs or snaps or pops its jaws and swats the ground, it is a warning sign that you are too close. Slowly back away. Never run from a bear — running can trigger a chase response. Instead, make yourself appear large, speak in a firm, calm voice, and create distance slowly.
| Situation | What to Do | What to Avoid |
|---|---|---|
| Bear in your yard | Make loud noise, go inside, remove attractants | Approaching or feeding the bear |
| Bear on a trail | Stand tall, speak calmly, back away slowly | Running or turning your back |
| Bear charges | Stand your ground, use bear spray if available | Playing dead (not effective with black bears) |
| Bear enters home | Open an exit, call 911 or NJDEP hotline | Cornering the bear inside |
Reporting and Emergency Contacts
For bear-related issues or aggressive behavior, contact local police or the NJDEP hotline at 1-877-WARN-DEP (1-877-927-6337). You should report any bear that is acting aggressively, has entered a structure, injured a person or pet, or is repeatedly returning to a property despite deterrent efforts.
NJDEP wildlife experts emphasize that a black bear passing through an area and not causing a specific problem — such as breaking into trash or otherwise trying to access food sources on people’s properties or posing a safety threat — should be left alone.
For hikers and campers, the same principles apply. Store food in bear canisters or hang it at least 10 feet off the ground and 4 feet from any tree trunk. Never bring food into a tent. Stay aware of your surroundings, especially in high-density bear areas of neighboring Connecticut and Massachusetts if your adventures take you north.
Want to learn more about bear behavior and ecology? Explore our deep dives into predators of bears and what animals eat bears for a fuller picture of where black bears fit in the food web.
Staying Safe While Hiking
When you’re out on the trails during bear season, a few simple habits go a long way. Make noise as you hike — talk, clap, or use a bear bell — so you don’t startle a bear at close range. Stay on marked trails and be especially alert near berry patches, streams, and dense brush where bears like to forage and rest.
- Hike in groups when possible, especially in northwestern New Jersey
- Keep dogs on a leash — a loose dog can provoke a bear and then run back to you
- Carry bear spray and know how to use it before heading into the backcountry
- Be extra cautious at dawn and dusk, when bears are most active
- Never approach a mother bear with cubs under any circumstances
Bears in New Jersey are a natural and valued part of the state’s wildlife heritage. By nature, black bears are wary of people and attacks are incredibly rare. With the right knowledge and habits, you can enjoy the outdoors confidently throughout bear season. For more regional wildlife awareness, check out when snakes come out in New Jersey and stay informed about all of the state’s seasonal wildlife activity.