Termite Swarm Season on Oahu 2026

If you’ve seen clouds of winged insects around your porch light or a pile of discarded wings on a windowsill, you’ve met termite swarm season. On Oahu it’s one of the clearest warning signs that a colony is nearby — and possibly already in your home.

Hawaii has some of the highest termite pressure in the country, so it pays to know what you’re looking at.

What a “swarm” actually means

A swarm is a colony sending out winged reproductives (called alates) to start new colonies. Swarmers are weak fliers — if you’re seeing them inside or right around your house, the colony is close. After they land, they shed their wings, which is why discarded wings near windows and doors are such a telling sign.

Seeing a swarm doesn’t mean your house is lost. It means it’s time for an inspection.

Drywood vs. subterranean termites

Oahu homeowners deal with two very different threats:

Drywood termites

• Live inside dry wood — roof framing, trim, door frames, and furniture.
• Need no contact with soil.
• Give themselves away with frass: small piles of pellet-like droppings that look like coarse sand or coffee grounds.
• Often treated with localized spot treatments; heavy infestations may require whole-structure fumigation (tenting).

Formosan subterranean termites

• One of the most destructive termites on earth, and very active on Oahu.
• Live in large colonies in the soil and tunnel up into structures.
• Build mud tubes along foundations and walls to travel.
• Treated with soil/barrier treatments and baiting systems.

Warning signs to watch for

• Discarded wings near windows, doors, or light fixtures
• Mud tubes on foundation walls, piers, or in the crawlspace
• Frass (pellet droppings) beneath wood trim or furniture
• Wood that sounds hollow when tapped, or paint that looks blistered
• Doors or windows that suddenly stick

What to do if you see swarmers

1. Don’t spray them. Killing the visible swarmers does nothing to the colony and can make a professional inspection harder.
2. Save a few in a bag or take a clear photo — species ID guides the right treatment.
3. Note where you saw them. Indoors and near the structure is more urgent than out by the street.
4. Schedule an inspection. The sooner activity is found, the cheaper and simpler the fix.

Why local matters for termites

Termite behavior in Hawaii isn’t like the mainland — our climate keeps colonies active year-round, and our building stock (from older plantation homes to new construction on former ag land) creates unique vulnerabilities. Our technicians live here and know exactly where to look.

If you’ve spotted swarmers, frass, or mud tubes, book a free termite inspection — we’ll tell you exactly what you’re dealing with and the most cost-effective way to handle it.