When Is Termite Season in Riverside? Best Time to Schedule an Inspection

If you've lived in Riverside for any length of time, you've probably noticed swarms of small winged insects near outdoor lights on warm spring evenings. Those are termite swarmers — and their appearance marks the most visible part of "termite season" in the Inland Empire.

But here's the important thing Riverside homeowners need to understand: while swarming is seasonal, termite damage happens 365 days a year.

When Do Termites Swarm in Riverside?

Different termite species swarm at different times:

Subterranean termites typically swarm in Riverside from February through May, usually on warm days following rain. You'll see them during daylight hours, often in large numbers near windows, doors, and light sources.

Drywood termites tend to swarm from September through November, usually in the evening. They're attracted to lights and often enter homes through attic vents, window gaps, and small openings.

In Riverside's mild climate, it's not unusual to see swarms outside these typical windows — especially after an unseasonal rain or during an extended warm spell.

Why Termites Are Active Year-Round in Riverside

Unlike areas with harsh winters where termite activity slows dramatically, Riverside's climate keeps termites active in every month of the year:

• Winter lows rarely drop below 40°F — not cold enough to slow termite feeding
• Irrigated landscaping provides constant moisture for subterranean species even during our dry summers
• Warm attic temperatures (often 100°F+ in summer) accelerate drywood colony growth
• Clay soils throughout much of Riverside retain moisture that sustains underground colonies

This means the colony eating your home in January is the same colony eating your home in July — and it's getting bigger the entire time.

The Best Time to Schedule an Inspection

The short answer: now. There's no wrong time to get a termite inspection in Riverside, and waiting for a "better" time only gives existing colonies more time to cause damage.

That said, there are a few strategic reasons to schedule at specific times:

Spring (March – May)

• Subterranean swarming season — if you see swarmers, get an inspection immediately
• Best time to catch subterranean activity that's been building over winter
• Popular time for real estate transactions (inspections often required for escrow)

Early Fall (September – October)

• Drywood swarming season begins
• Good time for a preventive check before drywood termites try to establish new colonies in your home
• Weather is cooling — more comfortable for attic and crawlspace inspection

Before Buying or Selling a Home

• Lenders often require a WDO (Wood Destroying Organism) report
• A clean inspection report is a strong selling point
• Catching problems before closing saves negotiation headaches

After Remodeling or Landscaping Changes

• New additions, decks, and grading changes can create new pathways for termites
• Adding mulch, planters, or irrigation near the foundation increases subterranean risk

What Happens During an Inspection?

A thorough termite inspection covers your entire property:

• Exterior: Foundation perimeter, eaves, fascia boards, decks, fencing, and landscaping contact points
• Interior: Baseboards, window frames, door frames, closets, and accessible wall areas
• Substructure: Crawlspace framing, piers, and sill plates (if accessible)
• Attic: Roof framing, rafters, sheathing, and vents

The inspector looks for live termites, evidence of past or current activity (mud tubes, frass, damage), and conditions that make your home more vulnerable (moisture, wood-to-soil contact, etc.).

The entire process takes about 30 to 60 minutes for a typical Riverside home, and you'll receive a written report of all findings.

Don't Wait for Swarmers

The biggest mistake homeowners make is waiting until they see visible evidence before taking action. By the time swarmers appear, the colony has been established for several years. By the time you notice damage, it's often extensive.

A free inspection takes less than an hour and can save you thousands in potential repair costs. No obligation, no pressure — just answers.