If you notice more termites, mud tubes or discarded wings around your Melbourne home after a period of wet weather, you are not imagining it. Rain can create conditions that make termite activity more noticeable, particularly when warmer temperatures and higher humidity arrive at the same time.
The combination of increased moisture, damp areas and seasonal swarming can encourage termites to forage and, in warmer months, leave established colonies in search of new nesting sites. While rain does not automatically cause a termite infestation, it can make existing activity easier to spot and create conditions that termites favour.
If you have noticed signs of termite activity around your property after recent rain, book a professional termite inspection with Specialist Termite Control.
An inspection can help identify active termites, existing damage and conditions around your property that may increase the risk of infestation. The good news is that seeing termites after rain does not necessarily mean your home has an established infestation. However, wet weather can bring termite activity to your attention, making it a useful time to check for the signs and conditions that could put your property at risk.
So, why does rain make such a difference to termite activity? Let’s unpack the link between Melbourne’s wet weather, moisture and termite behaviour.
Table of Contents
- The Link Between Rain and Termite Activity
- Why Damp Timber Can Be A Problem
- Melbourne’s Climate and the Termite Calendar
- What Is A Termite Swarm?
- Why Do Termite Swarmers Die?
- Warning Signs to Look for After Heavy Rain
- Property Conditions That Can Increase Termite Risk
- What to Do After a Wet Spell
- When to Book a Professional Termite Inspection
- Why Late Winter Can Be A Useful Time To Inspect
- Frequently Asked Questions
- Stay Ahead of Termite Activity
The Link Between Rain and Termite Activity
Termites love moisture. Subterranean termite colonies require humid conditions. In fact, termite workers rarely stray far from the soil or moisture unless they’re on timber or running through shelter tubes they’ve built to avoid exposure to dry air.
High volumes of rainfall during winter saturate the ground around your property. After periods of rain, there will be a much higher moisture level around the outside, making your home very attractive to termites. This can create ideal foraging conditions for termites if there are colonies located nearby. Higher moisture content can grant termites easier entry to spaces near your residence.
Rain won’t cause pre-existing issues around your home to happen overnight. However, if you have areas of poor drainage or leaking pipes, blocked gutters or constantly damp areas under your house, then rain will become an indicator of these problem areas. All of these can create moisture conditions that will attract termites.
Why Damp Timber Can Be A Problem
Termites eat cellulose, which is found in timber and plant matter. Some sources of cellulose that may be found around your home include buildings, garden sleepers, decking, fencing and firewood stored against the home.
If timber is damp because of rain, it doesn’t necessarily mean termites will be attracted to it. However, timber that stays wet due to poor drainage, ground contact or a leak will provide ideal conditions.
Victorian public health advice includes fixing moisture problems around buildings by improving drainage, repairing leaking pipes, keeping sub-floors dry and well ventilated and not storing timber against or around buildings.
That’s why these wet periods can be a timely reminder to look at your property and check it’s not hosting conditions termites love.
Melbourne’s Climate and the Termite Calendar
Termites don’t magically decide to appear because it is a certain month of the year. Termites are very much dictated by the environment around them with factors including temperature, moisture and humidity playing their parts.
In Melbourne, you can encounter termite activity anytime during the year. Warmer months however, are key when it comes to termites’ visible activity and swarm activity, but they don’t die in the cold. When most people think of termites it’s usually spring/early summer that they associate with termite swarm sightings. Every year the peak termite swarm period can vary depending on the weather and species of termite.
If we experience a warm week followed by rain, the humidity levels and lack of wind create ideal conditions for winged termites. These winged termites (referred to as alates) are looking to leave the nest and explore the opportunity to create a new colony. According to Victorian Health, swarming flights happen when it’s hot and humid, after the rain has passed and the air is still.
What Is A Termite Swarm?
Contrary to popular belief, a termite swarm doesn’t indicate a new infestation suddenly taking over your property. Termite swarming is part of the reproductive process of a termite colony. Winged reproductive termites, called alates, will emerge from the nest when a mature colony reaches the reproductive stage and takes part in what is called a colonising flight.
They may swarm around windows and doors, outdoor lights or other areas before settling and shedding their wings in an attempt to start their own colony. That is why finding evidence of a termite swarm following rain can be worthwhile investigating.
Just because there’s been a swarm outside your property doesn’t mean you have termites in your home. It may have nested in a tree, stump, garden area or neighbouring property near your home. Finding a swarm near your house is a good reason to schedule a professional inspection, especially if you suspect other activity.
Why Do Termite Swarmers Die?
Few swarmers live a very long lifecycle. Their role in the termite colony is to fly from the old colony, mate and hopefully start a new colony. Many will be eaten by predators or dried out before they make it far. Some will not find a suitable place to nest.
Discarded wings often accumulate around windows, doors, light fittings or wherever the flying termites swarmed together. These wings can stay long after the swarm has ended, and are one of the easier clues for homeowners to find.
Warning Signs to Look for After Heavy Rain
Rain can make termite activity easier to spot, but a swarm is far from the only warning sign. Some evidence can appear outside the home, while other signs may be hidden in timber, floors or wall cavities.
After heavy rain, knowing what early warning signs to look for can help you identify potential termite activity before more extensive damage occurs:
| Warning Sign | Where To Look | What It Could Indicate |
Mud Tubes or Termite Leads | Foundations, concrete piers and stumps, retaining walls, sub-floor areas, external walls and where timber meets the ground. | Subterranean termites may be using these narrow mud tubes to travel between their colony and a food source while maintaining the moisture they need. |
Discarded Wings | Around windows, doors, light fittings and floors. | A nearby termite swarm may have occurred. Winged termites, known as alates, shed their wings after leaving the colony to establish new colonies. |
Hollow or Blistering Timber | Skirting boards, architraves, door frames and other timber components. | Termites may be feeding inside the timber, leaving the outer surface relatively intact while causing hollow-sounding areas, blistering or bubbling. |
Doors and Windows Suddenly Sticking | External doors, internal doors and window frames. | Moisture can cause timber to swell after heavy rain, but sticking doors or windows alongside other signs of timber damage should be investigated. |
Sagging or Spongy Floors | Timber floors and other areas where the floor feels unusually soft or unstable. | Could indicate moisture damage, timber deterioration or concealed termite damage. A professional assessment can help determine the cause. |
The absence of mud tubes or other blatant evidence is not a sure sign that your home is free of termites. Termites can enter buildings through concealed areas and go undetected within wall voids, flooring and other structural areas of a structure.
If you discover one or more of these red flags, schedule a termite inspection by our trained professionals rather than waiting for visible evidence to appear.
Property Conditions That Can Increase Termite Risk
In addition to rainfall levels, certain property conditions can increase the likelihood of termites. The following factors can cause moisture to be retained around the property for longer periods of time.
Blocked gutters and downpipes
If gutters and downpipes become blocked, they can cause soil, walls and timber around the home to become repeatedly wet. Check that your gutters and downpipes are clear and water is being directed away from the building.
Poor sub-floor ventilation or drainage
A consistently damp sub-floor can cause moisture to become trapped around your home. If your home has an accessible sub-floor, check that ventilation points are clear and not covered. Ensure there is no pooling of water underneath the building.
Soil, mulch or garden beds against the building
Mulch, soil and garden beds can hold moisture against your home. If soil or mulch covers any inspection areas around your property, or is left sitting high against the building, you’ll have a reduced chance of spotting termite activity. Ensure soil and mulch are kept clear of weep holes and inspection points.
Leaking taps, pipes and air-conditioning systems
Heavy rainfall isn’t the only culprit. Water leaks from outdoor taps, leaking pipes, air-conditioning condensation and hot water tank overflows can create areas of consistent moisture around the outside of your home. These problem areas can keep attracting termites even after the rain stops.
Timber and firewood stored against the house
Firewood, timber off-cuts, sleepers and other timber should not be stored against your home. By storing firewood away from the building, you can both easily inspect your home’s perimeter and limit the amount of food sources directly next to your home.
What to Do After a Wet Spell
You do not need to panic every time Melbourne has a week of rain. Instead, use wet weather as a prompt to check for conditions that could increase termite risk.
Start by:
- Clearing gutters and checking downpipes so rainwater is directed away from the building.
- Checking for standing water around foundations, garden beds and outdoor plumbing.
- Looking at sub-floor areas, where accessible, for signs of excessive moisture or poor ventilation.
- Keeping soil and mulch away from weep holes and inspection zones.
- Moving stored timber and firewood away from the house.
- Checking for visible termite signs, including mud tubes, damaged timber and discarded wings.
One important point is what not to do.
If you find suspected termite activity, avoid breaking open mud tubes, cutting into damaged timber or otherwise disturbing the area before it has been assessed.
Termites can retreat from a disturbed area, which can make active workings harder to locate during an inspection. Taking photographs and leaving the suspected area intact can give a termite technician more useful information.
When to Book a Professional Termite Inspection
Inspections are recommended because the ideal time to see termites is before you can see them. By the time there is visible damage, they could have been active inside the home within hidden structural areas for years. Regular inspections by a qualified professional aim to detect activity or risk much sooner.
AS 3660.2:2017 is the Australian Standard for termite management around existing buildings and structures. This industry standard includes recommendations for managing subterranean termites in relation to existing homes and buildings.
Annual professional inspections provide homeowners with an essential benchmark. Depending on construction, environment and inspection history, higher-risk properties or properties with previous termite activity may require more frequent inspections.
Why Late Winter Can Be A Useful Time To Inspect
Late winter and early spring are often a great time for homeowners in Melbourne to schedule their termite inspection before summer arrives with its greater termite and swarming activity.
This timing is especially beneficial if your place has dealt with drainage problems, lingering dampness, prior termite issues, or anything else that makes it an easier target. Perhaps more importantly, don’t feel that you need to wait until you actually see a termite swarm to schedule your inspection.
If you have observed suspicious timber damage, mud tubes, discarded wings or moisture that just won’t go away, call the professionals and find out if your home shows any signs of termite activity. During your inspection, they can advise if treatment or preventative measures are needed.
Looking for a termite inspection in Melbourne? Specialist Termite Control can assess your property for signs of termite activity, timber damage and conditions that may increase the risk of infestation. Contact the team to arrange a professional termite inspection.
Frequently Asked Questions
Do termites come out more when it rains?
Rainfall will increase termite activity because rain will increase the moisture level in the soil and raise humidity levels. Termites may also swarm after rain if the temperature increases and humid conditions are present.
What months are termites most active in Melbourne?
Termites can be active throughout the year, but termite activity and swarms tend to be more obvious during warmer weather. In Melbourne, you may see more termite activity during spring and summer.
Can heavy rain cause a termite infestation?
Rain itself won’t cause an infestation. However, if you’ve had heavy rainfall and have moisture build-up, drainage issues around your property or softened soil termites will take advantage and be active.
How soon after rain should I check for termites?
You can inspect for termites during or after rainy seasons. Especially if rain is followed by warm weather conditions. Common signs include mud tubes, wings discarded near termite entry points, damaged timber, and areas of high moisture.
Does rain wash away termite treatment or barriers?
Not really. Rain doesn’t usually affect termite treatments or barriers; however flooding, landscaping and altered drainage can interfere with some termite solutions.
Stay Ahead of Termite Activity
Rain in Melbourne doesn’t necessarily mean termites will become active however, heavy rain can bring about that ideal combination of moisture and humidity termites thrive on and make their activity more obvious.
The best course of action is not waiting until you discover serious damage has occurred. Manage moisture levels, ensure inspection points around your property are clear and look out for other warning signs such as mud tubes, discarded wings and changes to timber that you can’t explain.
If recent rain has seen termites become active around your property or you’d just like to know what’s happening before spring comes around, call our termite experts today for a comprehensive termite inspection so we can advise if any further termite control measures are required.
Specialist Termite Control provides professional termite treatments and termite management services across Melbourne. Get in touch to arrange an inspection and identify potential termite risks before they become a larger problem.
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