Massachusetts Tick Season: Peak Months, Risk Areas, and How to Protect Your Family
March 29, 2026
Ticks in Massachusetts are not just a summer concern — they are active for much of the year, and the diseases they carry can have serious health consequences. Whether you spend time hiking the Blue Hills, gardening in your backyard, or walking your dog through a neighborhood park, the risk of a tick bite is real and present across the state.
Understanding when ticks are most active, which species you might encounter, and what steps you can take to protect yourself and your family can make all the difference. This guide walks you through everything you need to know about tick season in Massachusetts, from peak activity periods to what to do if you find a tick attached to your skin.
Key Insight: Massachusetts has the 3rd highest rate of Lyme disease in the country. Staying informed is your first line of defense.
When Is Tick Season in Massachusetts
Massachusetts has no single tick season — tick activity and tick-borne illnesses can occur year-round in the state. That said, knowing when activity peaks gives you a clear advantage in protecting yourself and your loved ones.
Although tick activity is weather-dependent, there are two peaks during the year: the first begins in March/April and lasts through August, and the second occurs in October–November. The majority of cases of tick-borne disease occur in June through August.
As temperatures warm up in the spring, ticks emerge — eggs hatch into larvae, larvae grow into nymphs, and adult females lay new eggs. The main threat in spring and summer comes from nymph ticks, which are big transmitters of Lyme disease. The second wave of activity in the fall is driven by adult ticks, which are busy mating before winter arrives.
Nymph-stage deer ticks are active from early May through early August. They are about the size of a poppy seed, have a bite that is difficult to feel, and carry the highest risk — they are responsible for the majority of tick-borne diseases.
Pro Tip: Don’t let a cold snap make you complacent. Ticks will emerge and quest for a host anytime the temperature is above 32 degrees Fahrenheit. Winter yard work and hiking can still put you at risk.
Climate change has extended tick seasons, with warmer winters enabling earlier spring activity and longer fall risk periods. The Massachusetts Executive Office of Health and Human Services warns that the tick season peaks could start earlier due to the impact of warming temperatures.
Types of Ticks Found in Massachusetts
Deer ticks and dog ticks are found throughout Massachusetts; Lone Star ticks are also found in some places in Massachusetts. Each species has its own behavior, activity window, and disease risk profile. Here is what you should know about each one.
Black-Legged Tick (Deer Tick)
Black-legged ticks, sometimes called deer ticks, are responsible for spreading Lyme disease, babesiosis, anaplasmosis, Borrelia miyamotoi, and Powassan virus. Both nymph (young) and adult black-legged ticks will bite humans. The highest risk of being bitten by this kind of tick occurs throughout the spring, summer, and fall seasons. However, adults can also be out searching for a host any time winter temperatures are above freezing.
Black-legged tick nymphs are the size of a poppy seed, and adults are the size of a sesame seed. Their small size makes them especially easy to miss during a tick check. To learn more about how ticks reproduce and why populations can grow so quickly, visit our guide on how ticks reproduce.
American Dog Tick (Wood Tick)
Dog ticks are responsible for spreading Rocky Mountain spotted fever and certain types of tularemia. In general, only the adult dog tick will bite humans. The highest risk of being bitten by a dog tick occurs during the spring and summer seasons. Adult dog ticks are about the size of a watermelon seed.
Lone Star Tick
Recently, the Lone Star Tick (Amblyomma americanum) has been identified on the Cape and Islands. All life stages of the Lone Star tick can bite humans. They are active when temperatures are over 50°F, with peak activity from May to August.
Lone Star ticks have not been a significant source of infectious disease for humans in Massachusetts but are capable of spreading tularemia, ehrlichiosis, and southern tick-associated rash illness (STARI). Lone Star tick saliva can be irritating, but redness and discomfort at a bite site does not necessarily indicate any infection. Exposure to Lone Star tick saliva has been shown to cause Alpha-gal syndrome, which presents as an allergy to mammalian meats and products in some people.
Important Note: Martha’s Vineyard has experienced an epidemic of Alpha-gal Syndrome after an explosion in the tick population. Lone Star ticks have been found on Cape Cod since 2011, and researchers are finding them in more and more areas of the Cape.
Woodchuck Tick (Groundhog Tick)
Woodchuck ticks (Ixodes cookei) are mostly found on woodchucks and rarely bite humans. They can be found throughout the summer months with peak activity during July. They are very similar in size and appearance to deer ticks and are the primary vector for Powassan virus.
Tick-Borne Diseases in Massachusetts
In Massachusetts, certain kinds of ticks can bite you and spread diseases like Lyme disease, babesiosis, anaplasmosis, tularemia, Rocky Mountain spotted fever, Borrelia miyamotoi, and Powassan virus. Knowing the symptoms of each can help you seek treatment quickly.
| Disease | Tick Vector | Key Symptoms | Onset After Bite |
|---|---|---|---|
| Lyme Disease | Black-legged (deer) tick | Bull’s-eye rash, fever, fatigue, joint/muscle aches | 3–30 days |
| Babesiosis | Black-legged (deer) tick | Fever, chills, fatigue, anemia (may be asymptomatic) | 1–4 weeks |
| Anaplasmosis | Black-legged (deer) tick | Fever, headache, chills, muscle aches, nausea | 7–14 days |
| Rocky Mountain Spotted Fever | American dog tick | High fever, headache, rash on palms and soles | 3–14 days |
| Powassan Virus | Black-legged tick / Woodchuck tick | Fever, headache, vomiting, brain inflammation | 1–4 weeks |
| Tularemia | Dog tick / Lone Star tick | Skin sore, swollen lymph nodes, fever | 3–21 days |
| Borrelia miyamotoi | Black-legged (deer) tick | Fever, fatigue, headache (no rash) | Days to weeks |
Overall, Massachusetts has the 3rd highest rate of Lyme disease in the country, behind Connecticut and New York. Lyme disease is caused by bacteria, Borrelia burgdorferi, which is spread by the bite of an infected deer tick.
Early-stage Lyme disease (days to weeks after a bite) presents most commonly as a rash — often starting as a small red area that spreads outward, clearing in the center so it looks like a donut. Flu-like symptoms such as fever, headache, stiff neck, sore and aching muscles and joints, fatigue, and swollen glands may also occur.
If untreated, people with Lyme disease can develop late-stage symptoms even if they never had a rash. The joints, nervous system, and heart are most commonly affected. About 60% of people with untreated Lyme disease get arthritis in their knees, elbows, and/or wrists.
Powassan Virus is rare but deadly, with 10 Massachusetts cases reported in 2023. Symptoms range from fever to life-threatening brain inflammation. For a deeper look at this and other neurological tick-borne illnesses, see our article on tick-borne encephalitis.
Common Mistake: Many people assume that no bull’s-eye rash means no Lyme disease. In reality, the characteristic rash only occurs in about 60% of cases — so do not wait for a rash before contacting your healthcare provider after a deer tick bite.
Babesiosis is sometimes called “Massachusetts Malaria.” It is the second most common tick-borne illness on Cape Cod and the Islands, after Lyme disease. Anaplasmosis is caused by bacteria that attack granulocytes, a type of white blood cell important for fighting infection, and is the third most common tick-borne disease on Cape Cod and the Islands.
High-Risk Areas and Habitats in Massachusetts
Ticks are tiny bugs most likely found in shady, damp, brushy, wooded, or grassy areas — especially in tall grass — including your own backyard. You do not have to venture deep into the wilderness to encounter them.
Lyme disease is considered endemic in the entire state of Massachusetts. Areas of highest incidence include Cape Cod and southeastern Massachusetts, the islands of Nantucket and Martha’s Vineyard, areas north of Boston in Essex County, towns along the upper Middlesex and Worcester county border, along the Quabbin Reservoir watershed, and in southern Berkshire County.
In Massachusetts, Dukes and Nantucket County — the islands off Cape Cod — lead Lyme disease rates. Two studies that collected questing ticks from high-risk areas in Massachusetts found Borrelia burgdorferi in more than 60% of deer ticks.
Urban green spaces are not immune either. Leaf litter and brush piles create damp, shady environments where ticks thrive. Urban green spaces like the Arnold Arboretum, the Esplanade, and Fresh Pond Reservoir remain high-risk areas through October.
Activities that put you at risk for tick exposure include spending time outside in your yard, gardening, walking your dog, camping, hunting, and hiking — among other outdoor activities. If you enjoy hunting in Massachusetts, be sure to take tick precautions during deer hunting season and dove hunting season, when you are spending extended time in tick-heavy habitats.
Key Insight: In October, fully 50 percent of the deer ticks that bite you in Massachusetts will be infected with Lyme disease — making the fall peak period especially dangerous.
To help manage tick populations naturally, consider learning about animals that eat ticks and how encouraging them in your yard can reduce your local tick burden.
How to Protect Yourself, Children and Pets During Tick Season in Massachusetts
Prevention is the most effective tool you have against tick-borne illness. A combination of personal protection, yard management, and daily tick checks significantly reduces your risk — for every member of your household.
Personal Protection When Outdoors
- Stick to main pathways and the center of trails when hiking. Wear a light-colored, long-sleeved shirt with long pants and tuck your pants into your socks.
- The CDC suggests treating your everyday walking, hiking, and hunting clothes and gear with 0.5% permethrin, or buying items that are already pre-treated.
- Repellents that contain DEET can be used on your exposed skin, and permethrin can be used on your clothes. Always follow the product instructions and use repellents with no more than 30–35% DEET on adults and 10–15% DEET on children. Never use insect repellents on infants.
- Bathe as soon as possible after coming indoors — preferably within two hours — to wash off and more easily find ticks that are on you.
Daily Tick Checks
One of the most important things you can do is check yourself for ticks once a day. Favorite places ticks like to go on your body include areas between the toes, back of the knees, groin, armpits, and neck, along the hairline, and behind the ears.
Ticks can be as small as a poppy seed, so use a mirror or ask someone to help with hard-to-see areas. Check your children thoroughly after any outdoor play, paying special attention to the scalp and hairline.
Protecting Your Pets
Regardless of the precautions you take, always do a thorough tick check of yourself and your pets anytime you leave the yard. Dogs that love to explore will commonly get ticks attached to their ears, snout, or underside of their chin from sticking their faces into brush — but check them from snout to tail.
Family pets can suffer from tick-borne disease and can also carry infected ticks into your home. Talk to your veterinarian about using tick collars and sprays. For more guidance on keeping your dog safe, read our detailed guide on preventing tick-borne diseases in dogs.
Yard and Property Management
Your own yard can be a significant source of tick exposure. A few consistent habits can dramatically reduce the tick population around your home:
- Keep grass cut short. Remove leaf litter and brush from around your home. Prune low-lying bushes to let in more sunlight.
- Move bird feeders to low-traffic areas, as seed and suet may attract wildlife that carries ticks. Consider installing a deer fence or use plantings that deer do not like.
- Traditional tick control mist kills adult ticks on contact, while tick tubes placed strategically around your property entice mice. Since most ticks get their first blood meals from mice, they are exposed to the treated material that effectively eliminates them and hundreds of tick nymphs found in each mouse nest.
Pro Tip: One often-overlooked step at this time of year is taking measures to keep mice out of your house. This is the season they start looking for warmer places to spend the winter, and they can bring ticks inside with them.
What to Do If You Find a Tick in Massachusetts
If you find a tick attached to your skin, don’t panic. Prompt and proper removal is the key step. The longer an infected tick remains attached to a person or animal, the higher the likelihood of disease transmission.
How to Remove a Tick Safely
- Use a pair of fine-point tweezers to grip the tick as close to the skin as possible and pull straight out with steady pressure.
- Do not twist or jerk the tick, as this can cause the mouthparts to break off and remain in the skin. If this happens, remove the mouthparts with tweezers. If you are unable to remove the mouth easily with clean tweezers, leave it alone and let the skin heal.
- After removing the tick, thoroughly clean the bite area and your hands with rubbing alcohol, an iodine scrub, or soap and water.
- You should not apply kerosene, petroleum jelly, nail polish, or a hot match tip to remove the tick. These measures are not effective and may result in injury.
- Circle the calendar date and note where on the body the tick was removed. You may want to save the tick for identification.
Important Note: In most cases, a deer tick must be attached for more than 24 hours to transmit Lyme disease bacteria to a human. Removing a tick promptly significantly reduces your risk of infection.
After Removal: What to Watch For
Notify your healthcare provider if you have been bitten by a deer tick or if you develop a rash or other signs of illness following a tick bite — such as fever, headache, fatigue, or sore and aching muscles.
Lyme disease can present symptoms days or months after you are bitten by an infected tick. Early symptoms typically show up in three to 30 days and include a rash, often in the shape of a bull’s-eye, fever, chills, fatigue, headaches, muscle aches, joint pain, and swollen lymph nodes.
Tick Testing
You can send the tick to be tested by the Laboratory of Medical Zoology at the University of Massachusetts Amherst. The report they provide is a valuable tool that can help you make informed decisions concerning your medical care. More information is available at TickReport.com.
The CDC also offers an interactive Tick Bite Bot — a tool that assists individuals in removing attached ticks and determining when to seek healthcare after a tick bite.
Reporting Tick Bites and Tick-Borne Illness in Massachusetts
Reporting tick bites and diagnosed tick-borne illnesses helps Massachusetts public health officials track disease trends, identify emerging hotspots, and allocate resources effectively. Here is how the reporting system works and what you can do.
How Tick-Borne Diseases Are Tracked in Massachusetts
Monthly tick reports show seasonal trends in reported tick bites and tick-borne disease diagnoses in Massachusetts residents. Tick activity and tick-borne diseases like Lyme disease, anaplasmosis, babesiosis, Borrelia miyamotoi, and Powassan virus occur year-round in Massachusetts.
Unlike most reportable diseases in Massachusetts, which rely on follow-up of laboratory case reports by the local Board of Health, Lyme disease utilizes a physician-based reporting system. The Massachusetts Department of Public Health receives notification about most suspect cases through receipt of positive laboratory tests, which are submitted directly to the DPH Integrated Surveillance and Informatics System (ISIS) by laboratories.
Tick-borne diseases are most frequently diagnosed in children and older adults — two groups worth monitoring especially closely after any outdoor exposure.
What You Should Do
- Contact your healthcare provider: Talk to your doctor if you develop a rash where you were bitten or experience symptoms such as fever, headache, fatigue, or sore and aching muscles.
- Contact the Massachusetts DPH: You can reach the Massachusetts Department of Public Health at (617) 983-6800 for tick-related health questions and hard copies of tick prevention fact sheets.
- Submit your tick for testing: The University of Massachusetts Amherst’s TickReport program allows you to submit a tick and receive a pathogen report. This can provide valuable information for your physician.
- Use the Tick App: The Tick App uses a combination of surveys and geolocation technology to uncover how people’s day-to-day activities play a role in their risk for tick-borne diseases. It is a citizen science tool that helps researchers improve public health responses.
- Report to your local Board of Health: Local Boards of Health receive notification of positive laboratory results about residents and may choose to follow up. Contacting your local board helps ensure community-level awareness.
Pro Tip: Even if you are unsure whether a tick was attached long enough to transmit disease, it is worth contacting your healthcare provider, especially after a deer tick bite in an endemic area of Massachusetts. Early treatment of Lyme disease and other tick-borne illnesses is significantly more effective than treating late-stage disease.
Tick season in Massachusetts demands year-round awareness, but it does not have to limit your time outdoors. By knowing when ticks are most active, which habitats to be cautious in, and how to check yourself, your children, and your pets after every outing, you give your family the best possible protection. Stay informed, stay prepared, and enjoy everything Massachusetts has to offer — safely.