When Is Tick Season? A Guide by Region (2026)

Ticks are active for a good part of the year across most of the United States, and warmer winters have stretched that window in many places. The short version is that late spring through early summer is the busiest stretch for the tick that most people worry about, but the exact timing depends on where you live and which tick species is common there.

At The Superbloc, we make a plant-based repellent built around 8% PMD from lemon eucalyptus, an active the CDC recognizes for both ticks and mosquitoes alongside DEET and picaridin. That means we spend a lot of time reading the seasonal research so families can plan trail days, garden afternoons, and camp weekends with confidence. This guide lays out when ticks are most active by region, why the season has been getting longer, and the simple routine that keeps you outside and comfortable.

The quick answer

Tick season in most of the United States runs from roughly April through September, with peak activity for nymph-stage blacklegged ticks (the tiny ones) in May, June, and July. Adult blacklegged ticks add a second surge in the fall, and in the warmer South ticks can be active nearly year-round. If daytime temperatures climb above about 45°F, ticks can be out looking for a host, which is why mild winters keep them going longer than they used to.

The practical takeaway: assume ticks are around any time the ground is not frozen, dress for it, and pair a CDC-recognized repellent with a quick tick check after you come indoors.

Why "tick season" is really more than one season

People often picture a single tick season, but the calendar depends on the life stage and the species.

Blacklegged ticks (also called deer ticks) go through three active stages. Larvae are most active in late summer. Nymphs, which are about the size of a poppy seed and the hardest to spot, peak in late spring and early summer. Adults are most active in the cooler shoulder months of fall and again in early spring whenever temperatures allow. That is why you can get bitten in October as easily as in June.

Other common ticks follow their own rhythms. Lone star ticks, widespread in the Southeast and now moving north, are aggressive from spring into late summer. American dog ticks are mostly a spring and early-summer concern. The Rocky Mountain wood tick shows up in spring at higher elevations. So the honest answer to "when is tick season" is that it depends on your region and which ticks live there.

Why mild winters extend the season

Ticks do not disappear in winter. They slow down and shelter under leaf litter, but they are not reliably killed by cold, especially under an insulating layer of snow. When winters are mild and shorter, the frozen window that keeps ticks dormant shrinks on both ends. Warm spells in late winter can wake adult ticks early, and mild falls let them stay active later.

Over the past several years, many parts of the country have seen earlier springs and later first frosts, and tick activity has followed. For planning purposes, it is smart to start protecting yourself a few weeks earlier in spring and keep going a few weeks longer in fall than the old rule of thumb suggested. If it is warm enough for you to be comfortable outdoors without a heavy coat, it is warm enough for ticks.

Tick season by region

Here is a practical breakdown of when ticks are most active across the major US regions, plus a note on Canada. Peak months are when the nymph-stage blacklegged ticks that drive most bites are most active, but remember that adults extend the risk into the cooler months.

Treat these ranges as a planning guide, not a guarantee. A warm March or a mild November can shift the edges in either direction.

Northeast

From Maine down through the Mid-Atlantic, the Northeast has the heaviest blacklegged tick pressure in the country. Nymphs peak in late spring and early summer, and adults return in force in the fall. If you hike, garden, or walk a dog in this region, plan on a full spring-through-fall routine.

Southeast

The warm, humid Southeast can have tick activity nearly year-round in mild years. The lone star tick is the standout here. It is fast-moving and abundant, and it is expanding its range northward. Spring through late summer is the busiest window, but do not assume winter is a clean break.

Midwest

The Upper Midwest, especially Wisconsin and Minnesota, is a blacklegged tick stronghold with a season that mirrors the Northeast. Nymphs peak in May through July. Farther south and west in the region, American dog ticks and lone star ticks add spring and summer activity.

West and Mountain West

Overall tick density tends to be lower in the West, but risk is real along the Pacific coast, in the foothills, and at certain elevations. The western blacklegged tick is active earlier, often from late winter into spring. In the Mountain West, the Rocky Mountain wood tick follows snowmelt, so timing shifts with elevation.

A note on Canada

Superbloc is Canadian-founded, so this one is close to home. The blacklegged tick has been expanding across southern Ontario, Quebec, the Maritimes, and parts of Manitoba. Peak activity runs through the summer, with the same spring and fall shoulder activity seen in the northern US. If you are traveling cross-border for the outdoors, the same protection habits apply on both sides.

How to protect yourself through tick season

Repellent is one layer of a simple, reliable routine. A repellent reduces bites, and pairing it with clothing choices and tick checks is the approach the CDC recommends. Here is what that looks like in practice.

Use a CDC-recognized repellent

Apply repellent to exposed skin before you head out. Our Bloc Off Spray uses 8% PMD from lemon eucalyptus, an active the CDC recognizes for ticks and mosquitoes alongside DEET and picaridin. It is lab-tested for 6+ hours of protection, alcohol-free and water-based, so it feels light rather than harsh on skin. For travel, day hikes, and quick reapplication on the trail, the Bloc Off Wipes do the same job in a pocket-sized format. Our brand testing supports use on children from 6 months of age. Note that general EPA and CDC guidance advises against oil of lemon eucalyptus products for children under 3, so families with younger toddlers should choose accordingly and follow the label.

Dress to make ticks easy to spot

Light-colored clothing makes ticks visible before they reach skin. Long sleeves and long pants help on brushy trails, and tucking pant legs into socks sounds fussy but genuinely works when you are walking through tall grass. Ticks usually climb from the ground up, so protecting your ankles and lower legs pays off.

Know where ticks wait

Ticks do not jump or fly. They wait on the tips of grass and low vegetation and grab on as you brush past, a behavior called questing. That means the edges of trails, leaf litter, tall grass, and the border between lawn and woods are the higher-risk zones. Walking in the center of a cleared trail meaningfully lowers your contact.

Do a tick check when you come in

This is the habit that ties everything together. After time outdoors, check yourself, kids, and pets. Pay attention to warm, hidden spots: behind the knees, the waistband, the hairline, underarms, and around the ankles. A shower within a couple of hours and a tumble of your clothes in a hot dryer both help. The CDC notes that finding and removing ticks promptly is one of the most effective steps you can take.

Building a season-long habit

The families we hear from tend to do best when protection becomes automatic rather than something they remember only after a scare. A spray by the back door, wipes in the car and the day pack, and a five-second tick check that is just part of coming inside. None of it takes real effort once it is routine, and it means the season becomes about more time outside rather than worry.

If you want to think in terms of coverage rather than a single pest, our guide to a repellent that covers both ticks and mosquitoes walks through how one formula handles both. And if avoiding DEET is a priority for your household, our roundup of the best DEET-free tick repellent options lays out what to look for on a label.

A brief, calm word on Lyme

Because it comes up, here is the aside rather than the headline. The CDC notes that blacklegged ticks can transmit Lyme disease, and that the risk is tied to how long a tick stays attached, which is exactly why prompt tick checks matter. This is context, not a reason to stay indoors. The goal is straightforward: enjoy the trail, the garden, and the campsite, and take the same sensible precautions you would with sun or hydration.

Frequently asked questions

When does tick season start? In most of the US, tick activity picks up in early spring, often March or April, as soon as daytime temperatures reliably climb above about 45°F. In the warm South, ticks can be active in winter too. Because of milder winters, it is wise to start protection a few weeks earlier than you might expect.

What are the peak tick months? Late spring and early summer, roughly May through July, are peak for the nymph-stage blacklegged ticks that cause most bites. Adult ticks add a second, cooler-weather surge in the fall, so risk is not limited to summer.

Does tick season really end in winter? Not cleanly. Ticks slow down and shelter under leaf litter and snow, but cold does not reliably kill them. On mild winter days above freezing, adult ticks can become active again. Treat any warm stretch as potential tick weather.

Is tick season the same in every state? No. Tick season varies by state and region because different tick species live in different places and local climate sets the timing. The Northeast and Upper Midwest have the heaviest blacklegged tick pressure, while the Southeast sees aggressive lone star ticks and a longer overall window. Check the regional table above for your area.

What is the best way to avoid tick bites during peak season? Combine three things: a CDC-recognized repellent such as our 8% PMD Bloc Off Spray, light long clothing with pants tucked into socks on brushy trails, and a tick check every time you come indoors. Repellent reduces bites, and pairing it with tick checks is the routine the CDC recommends.

Last updated: 2026-07-06. Sources: US Centers for Disease Control and Prevention (CDC) tick guidance and repellent recognition; US Environmental Protection Agency (EPA) repellent labeling guidance; regional and state cooperative extension tick activity data. By Tanya Lee, Co-Founder of The Superbloc.