What causes lights to flicker when it's windy outside in New Brunswick and should I be worried?

Flickering lights during windy weather are extremely common in New Brunswick — especially in exposed coastal areas along the Bay of Fundy, the Acadian Peninsula, and in communities like Shediac, Bathurst, Campbellton, and Grand Manan. While it's often harmless, some causes require immediate attention.

The Most Common Cause: NB Power Service Connection

The majority of wind-related flickering comes from your overhead service connection — the wires running from the NB Power utility pole to your home's weatherhead (the curved pipe at the top of your service mast). During strong winds, these wires sway and can create momentary loose connections at either end.

What's happening: The service drop wires are typically aluminum, connected to the utility pole with a wedge clamp and to your weatherhead with split-bolt connectors or compression fittings. Over time, these connections can loosen due to thermal cycling (aluminum expands and contracts with temperature changes — a significant factor in New Brunswick where temperatures range from +35°C in summer to -30°C in winter) and constant wind stress.

Signs this is your issue:

• Flickering affects the entire house — not just one room or circuit


• Flickering correlates directly with wind gusts


• You may notice the lights dim slightly rather than flicker rapidly


• The problem is worse during nor'easters and strong westerly winds

What to do: Contact NB Power to inspect the connection at the utility pole (their responsibility) and have a licensed electrician check the connection at your weatherhead and meter base (your responsibility). NB Power won't charge for inspecting their side. An electrician checking your weatherhead/meter base connection typically charges $100–$200 and can retighten or replace connectors.

Loose Connections at the Meter Base

Your electric meter sits in a metal box (meter base) on the exterior of your home. The connections inside — where the service entrance cable meets the meter socket — can loosen over time. This is the second most common cause of whole-house flickering during wind, because the wind physically shakes the meter base and wiggles the connections.

Warning signs:

• Burn marks or discolouration around the meter base


• A humming or buzzing sound from the meter area during wind


• The meter glass looks foggy or shows signs of heat damage


• A warm spot on the wall behind the meter base (check from inside)

This is potentially dangerous. A loose connection at the meter base causes arcing, which generates heat and can start a fire. If you notice any of these signs, contact your electrician and NB Power promptly. NB Power will need to pull the meter for the electrician to work safely inside the meter base.

Repair cost: $200–$500 for the electrician, plus NB Power's meter pull/reinstall (usually no charge).

Tree Branch Contact With Power Lines

New Brunswick's dense tree coverage means branches regularly grow into or near power lines. During wind, branches can:

• Make intermittent contact with the service drop to your home


• Sway into the main distribution lines on your street, causing neighbourhood-wide flickering


• Break and fall across lines, causing outages (common during ice storms and autumn nor'easters)

What to do: If you see a branch touching or very close to power lines, do not attempt to remove it yourself. Contact NB Power's tree trimming program. They maintain vegetation clearance around their lines at no charge. For branches near your service drop specifically, you may need to hire a certified arborist — costs range from $200–$800 depending on the tree and accessibility.

Problems Inside Your Home

Sometimes what seems like wind-related flickering is actually an internal wiring issue that's more noticeable during storms (because you're home, lights are on, and you're paying attention). Internal causes include:

Loose neutral connection at the panel: The main neutral wire connecting your panel to the service entrance can loosen at the bus bar. This causes a voltage imbalance between the two 120V legs of your service, making lights on one half of your panel dim while lights on the other half get brighter. This is dangerous — it can damage electronics and appliances.

Loose breaker connections: Individual breakers can lose their tight connection to the bus bar, especially in older panels. This causes flickering on specific circuits rather than the whole house. The panel may be physically moving slightly in wind if it's mounted on an exterior wall, worsening the connection.

Aluminum wiring connections: Homes built in New Brunswick during the late 1960s and 1970s may have aluminum branch circuit wiring. Aluminum expands more than copper and can work loose at connections over time. Wind vibration transmitted through the building structure can cause intermittent contact at these connections. If your home has aluminum wiring, have an electrician inspect connections using approved anti-oxidant compound and CO/ALR-rated devices.

When to Be Worried

Seek immediate attention if:

• Lights brighten dramatically on one circuit while dimming on another (neutral problem — turn off sensitive electronics immediately)


• You smell burning or see sparks at any electrical connection


• The flickering is getting progressively worse over weeks or months


• You hear a buzzing or crackling sound from your panel, meter base, or weatherhead


• A breaker trips during windstorms (potential arcing)

Monitor but not urgent:

• Brief, mild flickering during strong gusts that resolves immediately when wind dies down


• Flickering that affects the whole neighbourhood (NB Power distribution issue — they're likely already aware)


• Occasional flicker in one fixture (may be a loose bulb or failing LED driver)

Maritime-Specific Context

New Brunswick experiences some unique conditions that contribute to this issue:

• Salt air corrosion: Coastal homes near the Bay of Fundy, Northumberland Strait, and along the Saint John River estuary experience accelerated corrosion of aluminum connections. Annual inspection of your service connections is advisable.
• Ice loading: Our infamous Maritime ice storms add tremendous weight to overhead lines, stretching connections. After any significant ice event, flickering may increase.
• Post-tropical storms: When remnants of hurricanes and tropical storms track through the Maritimes (typically September-October), sustained high winds can cause significant service connection stress.

For persistent wind-related flickering, the systematic approach is: NB Power checks the pole connection → electrician checks weatherhead and meter base → electrician checks panel connections. This process of elimination usually identifies the problem within one or two service calls, totalling $100–$500 to diagnose and repair.

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