Hammock Insect Protection: How to Keep Mosquitoes, Sandflies and March Flies Away in Australia

You set up the hammock perfectly. The angle is right, the shade is just enough, the breeze is gentle. You climb in with a book and a cold drink. Three minutes later, your ankle is itching. Then your elbow. Then the back of your neck. Within ten minutes, you are back inside, slapping at bites and wondering why you even bothered. Insects are the single biggest reason Australians abandon their outdoor time. This guide fixes that.

The Problem: Australia Has a Lot of Biting Insects

Australia is home to over 300 species of mosquito, plus sandflies (biting midges), march flies (horse flies), ticks, and the occasional deer fly. The warm climate, abundant standing water, and long coastline create ideal breeding conditions across most of the country for most of the year. If you wait for a bug-free day to use your hammock, you will wait a long time.

The solution is not to go inside. The solution is to build a system that makes your hammock zone inhospitable to insects and comfortable for you. It takes about fifteen minutes of setup and it works.

Layer 1: Physical Barriers (The Most Effective)

Physical barriers work because they do not rely on chemicals, reapplication, or favourable wind. They just keep insects out. For hammock use, there are three options:

Hammock Mosquito Nets

A dedicated hammock mosquito net is a cocoon of fine mesh that drapes over your entire hammock. It is the single most effective insect protection you can buy. The mesh is fine enough to block mosquitoes, sandflies, and even most midges, while still allowing airflow so you do not feel like you are in a sauna.

• Ridge-line nets: These run along a separate ridgeline above your hammock suspension. They create a full cocoon that seals at both ends. Best for camping and extended outdoor sessions. Look for 360-degree coverage with double-layered entry zips.
• Pop-up nets: Self-supporting dome nets that require no ridgeline. You clip them to your hammock suspension points and they form a tent over you. Easier to set up than ridge-line nets, slightly less coverage at the ends.
• Built-in nets: Some hammocks come with integrated netting. Convenient but you cannot separate the net from the hammock, which means washing and storage are less flexible.

For Australian conditions, look for nets rated for no-see-um mesh (holes smaller than 1 mm). Standard mosquito mesh with 2 mm holes blocks mosquitoes but lets sandflies through. In tropical North Queensland, the Northern Territory coast, and anywhere near mangroves, no-see-um mesh is essential.

Pergola and Verandah Screening

If your hammock is under a pergola, on a verandah, or in any semi-enclosed space, screening the entire area is more effective than individual netting. Retractable fly screens, mesh curtains, or permanent screen enclosures turn your outdoor room into a bug-free zone for the entire season.

The upfront cost is higher (roughly $200 to $800 depending on the size of the area and whether you go retractable or fixed), but the convenience is unmatched. You walk out, sit down, and there are no insects. No net to set up, no spray to apply, no citronella to light. See our pergola hammock guide for setup details.

Clip-On Net Tents

A lighter alternative for balcony and courtyard setups. These are small, freestanding mesh tents that you clip to your hammock suspension or stand. They are smaller than full ridge-line nets and do not seal as completely, but they are portable and quick. Good for travel, good for renters, good for people who do not want permanent fixtures.

Layer 2: Repellents (Chemical and Natural)

Repellents are your second line of defence. They reduce the number of insects that approach your hammock zone, making the physical barrier less critical and giving you protection when you are getting in and out of the net.

DEET and Picaridin

DEET (N,N-diethyl-meta-toluamide) remains the gold standard for insect repellent in Australia. It is effective against mosquitoes, sandflies, march flies, and ticks. A 20 to 30 percent concentration provides three to six hours of protection. Higher concentrations last longer but do not work better.

Picaridin is the modern alternative. It is equally effective against mosquitoes, less irritating to skin, does not damage plastics and fabrics the way DEET can, and is odourless. For hammock use where you are sitting still for extended periods, picaridin is the better choice because you are not sweating it off as fast.

Plant-Based Repellents

If you prefer not to put synthetic chemicals on your skin, several plant-based options work, though none match DEET or picaridin for duration:

• Lemon eucalyptus oil (PMD): The only plant-based repellent registered with the Australian Pesticides and Veterinary Medicines Authority. Effective for up to two hours against mosquitoes. This is not the same as regular eucalyptus oil.
• Citronella: Works in a small radius around a candle or diffuser. Best for ambient protection on a verandah. Ineffective in windy conditions.
• Tea tree oil: Has some repellent activity but needs frequent reapplication. Better as an after-bite treatment than a preventive.
• Lavender: Mild repellent, pleasant scent. Works better as a relaxation enhancer than as serious insect protection.

Spatial Repellents for the Hammock Zone

For a fixed hammock spot, spatial repellents create a zone of protection that covers the entire area:

• Thermacell or similar butane-powered repellent devices: Create a 20-square-metre zone of protection. No open flame, no spraying on skin, no smell. Runs on a small butane cartridge with a repellent pad. Lasts about four hours per pad. Highly effective for hammock use because you are stationary within the zone.
• Citronella candles and coils: Work in calm air within a three-metre radius. Less effective than Thermacell-type devices but cheaper and easier to find. Best combined with a net.
• Essential oil diffusers: Fill a diffuser with lemon eucalyptus, lemongrass, or a blend and place it near your hammock. Pleasant, mild protection, and doubles as a relaxation enhancer.

Layer 3: Environment Management

The third layer is reducing the insect habitat around your hammock zone. No amount of netting helps if you are sitting next to a breeding ground.

• Remove standing water: Mosquitoes breed in as little as a tablespoon of water. Check for saucers under pot plants, blocked gutters, buckets, birdbaths, and tarps that hold rain. Empty them weekly.
• Trim vegetation: Dense shrubs and long grass provide resting spots for mosquitoes during the day. Keep the area around your hammock trimmed and open.
• Use a fan: Mosquitoes are weak fliers. A small outdoor fan on low, positioned to blow across your hammock area, physically prevents most mosquitoes from reaching you. This works remarkably well and is one of the most underused solutions.
• Plant insect-repelling species: Lemongrass, marigolds, rosemary, and mint around your hammock zone provide a mild deterrent and look good doing it. They are not a complete solution, but they reduce the numbers.
• Time your sessions: Mosquitoes are most active at dawn and dusk. Mid-morning to mid-afternoon is the lowest-activity window. March flies are most active in warm, sunny conditions during the middle of the day. See the regional guide below for specifics.

Australian Insect Seasons by Region

Knowing when and where the worst insects are active helps you plan your hammock time around them rather than fighting them.

• Tropical North Queensland and NT (Darwin, Cairns, Townsville): Mosquitoes year-round, peaking during the wet season (November to April). Sandflies are worst near mangroves and estuaries, especially at dawn and dusk. Dengue-carrying mosquitoes are present in the far north. Net and repellent are both essential here, every month of the year.
• Subtropical (Brisbane, Gold Coast, Sunshine Coast): Mosquitoes are worst from November to March, especially after rain. Sandflies are present near canals and estuaries. March flies appear from October to January, particularly in areas near bushland. Winter is the easiest season for insect-free hammock time.
• Temperate coastal (Sydney, Central Coast, Newcastle): Mosquitoes peak from December to March. Sandflies are present near waterways. March flies are a nuisance in bush-adjacent suburbs from October to February. Autumn and winter are relatively bug-free.
• Southern (Melbourne, Adelaide, Tasmania): Mosquitoes from December to April, manageable the rest of the year. March flies in rural and coastal areas from November to March. Sandflies are present but less of an issue than in tropical regions. The best time for insect-free outdoor hammock use in these cities is May through October.
• Inland (Canberra, Toowoomba, regional centres): Fewer coastal insects but more flies and march flies during warm months. Mosquitoes breed in irrigation channels and dams. Summer evenings can be surprisingly bad. Winter is generally clear.

After-Bite Care for Hammock Users

Despite your best efforts, you will get bitten occasionally. Keep a small after-bite kit near your hammock:

• Ice pack or cold compress: Reduces swelling and numbs the itch immediately. Keep a few instant cold packs in your hammock storage bag.
• Tea tree oil: Antiseptic and anti-inflammatory. Dab a small amount directly on the bite. Works within minutes for most people.
• Hydrocortisone cream (1 percent): For persistent or particularly inflamed bites. Available at any pharmacy without a prescription.
• Antihistamine tablets: Keep a strip of non-drowsy antihistamines nearby for days when you get multiple bites. They reduce the histamine response that causes swelling and itch.