When Do Ticks Come Out in NH? A Seasonal Guide for Lakes Region Homeowners

Every spring, as the snow melts off the hillsides around Ossipee Lake and Great East Lake, the calls start coming in. People want to know if ticks are bad this year, when they should start treatments, and what to do after their dog comes in from the backyard with something attached. And every January or February, without fail, someone calls because they found a tick on a warm afternoon and couldn't believe it was possible in the middle of winter.

The honest answer is that tick activity in Carroll County and western York County does not follow the simple spring through fall window that many people still expect. Warming winters, the specific microclimates created by our lakes and wetlands, and the heavy leaf litter common throughout the woodlands of this region mean that ticks here can remain active for the better part of the year.

The Two Ticks That Matter Most in Carroll County

Blacklegged Tick (Deer Tick)

The blacklegged tick is the species Carroll County homeowners should be most concerned about. It's the primary carrier of Lyme disease, anaplasmosis, and babesiosis in New Hampshire, and unlike the American dog tick, it does not take the winter off. Adult blacklegged ticks will actively quest for a host any time temperatures are above freezing, including during warm spells in December, January thaws, and the muddy weeks of late February before anyone is thinking about ticks.

The nymphs — roughly the size of a poppy seed and responsible for the majority of Lyme disease cases in humans — emerge in late May and are most active through June and into July. This is the window when people are outdoors most and when the ticks are hardest to detect on skin or clothing.

American Dog Tick (Wood Tick)

The American dog tick is the larger, more visible one that most people notice first in the spring. Adults emerge aggressively in April and May along trail edges, mowed lawn borders, and grassy areas. It cannot transmit Lyme disease, but it carries Rocky Mountain Spotted Fever and tularemia. This species is largely inactive by midsummer and does not overwinter as an adult, so the window of concern is more contained.

How Tick Activity Changes Through the Year

Most of our customers are surprised to learn there are really two separate peaks of tick activity to be aware of, and that winter does not provide the break from deer ticks that people assume.

Why Tick Pressure Is Higher Around Our Lakes and Wetlands

If you moved to the Wakefield or Ossipee area from somewhere more urban, the tick pressure here may feel noticeably different. That's because it genuinely is. Properties along Ossipee Lake, Province Lake, Great East Lake, and Merrymeeting Lake sit at the intersection of several factors that favor high tick populations year after year.

White-tailed deer density throughout Carroll County is significant. The mix of agricultural land, wetland edges, and second-growth forest between Route 16 and the Maine border creates ideal deer habitat, and deer are the primary reproductive host for adult blacklegged ticks. More deer generally means more ticks completing their life cycle and returning to the vegetation where people and pets encounter them.

The white-footed mouse plays an equally important role that often goes unrecognized. Ticks do not hatch carrying Lyme disease — they acquire the bacterium by feeding on infected white-footed mice during their larval and nymph stages. The dense mixed hardwood and scrub habitat common throughout Tuftonboro, New Durham, and the back roads of Shapleigh and Acton in Maine is exactly the kind of environment where white-footed mice thrive.

Lakefront and woodland properties also tend to have significant amounts of leaf litter at forest edges, along stone walls, and around foundation plantings. Ticks do not survive well in dry, exposed conditions. The moist, shaded layer of decomposing leaves is where they rest between questing bouts — and it's often found in the exact spots where children play and dogs run.

What You Can Do Around Your Property

• ✓ Keep your lawn mowed and allow it to dry out. Ticks prefer tall, moist grass. Consistent mowing and a healthy, well-drained lawn creates less favorable conditions for ticks in the areas where you spend the most time.
• ✓ Put a buffer between your lawn and the woods. A three-foot strip of wood chips or gravel at the lawn edge slows tick migration onto your property. Ticks don't travel far under their own power — they wait for a host to walk through.
• ✓ Rake and bag leaf litter each fall. Ticks overwinter in leaf litter and emerge directly adjacent to where they spent the winter. Piles near the foundation, under shrubs, and along fence lines are worth paying attention to.
• ✓ Do tick checks after any time outdoors. Prompt removal within 24 to 36 hours significantly reduces Lyme transmission risk. Nymphs especially are easy to miss — check hairlines, behind the knees, the groin, and behind the ears on children and pets.

How We Time Treatments for This Region

At Royle Turf and Tick we use plant oil-based tick control products. This is a deliberate choice. Many of the properties we treat are on or near lakes, ponds, and wetlands where what goes on your lawn eventually makes its way toward water. Our formulations are effective against the tick species in this region while being significantly gentler on pollinators, beneficial insects, and the aquatic ecosystems that lakefront properties depend on.

A Note on Lyme Disease in New Hampshire

New Hampshire consistently ranks among the top states in the country for Lyme disease incidence, and Carroll County has historically reported some of the highest rates within the state. Beyond Lyme, anaplasmosis cases in New Hampshire have increased substantially over the past decade. Babesiosis is less common but can cause serious illness, particularly in older adults and immunocompromised individuals.

We share this because it's the reality of where we live and work. The tick situation in this corner of New Hampshire and Maine is not the same as it is in other parts of New England, and homeowners who understand that are in a better position to protect their families and make good decisions about professional treatment programs.