When the Rains Don’t Stop: Bali’s Weather Shift & the Rising Threat of Dengue

By Jeff — July 2025

Bali has always danced to the rhythm of its tropical seasons: the dry season (May to September) brings in clear skies, surfable waves, and sunny optimism. But 2025 is turning out to be… different.

Locals and long-time expats are saying what we’re all thinking: “It shouldn’t be raining this much right now.” And they’re right.

 

Weather Gone Offbeat

According to Indonesia’s Meteorological, Climatological, and Geophysical Agency (BMKG), Bali has experienced 25% more rainfall than average for June and early July this year — an unusual spike during what’s supposed to be the island’s drier months. Instead of sun-drenched days, parts of Ubud, Canggu, and Seminyak have seen 3–4 rainy days per week, leaving puddles, blocked drains, and damp villas in their wake.

This might sound like a minor annoyance. But the consequences are proving far more serious.

 

A Perfect Storm for Mosquitoes

Stagnant water + warmth = the ideal breeding ground for Aedes aegypti — the mosquito species that spreads dengue fever. Hospitals across Bali are reporting a sharp rise in dengue cases. Denpasar General Hospital noted a 30% increase in dengue admissions this June compared to the same time last year. And with the rains still showing no signs of slowing down, the risk is escalating.

Tourism staff, villa managers, and concerned parents are scrambling for solutions. The usual fogging operations aren’t enough when mosquitoes breed indoors, hide in bathrooms, or find entry through open windows and doors.

 

Interview: On the Ground with Calibre’s Filly

To get a better sense of how this is affecting real homes and businesses, I spoke to Filly, operations manager at Calibre, one of Bali’s leading screen and door solution providers.

Jeff: What are you seeing on the ground this season?

Filly: It’s honestly busier than ever. We’ve had more requests in the last two months than we usually get in a quarter — mostly urgent installs from villa owners or developers who didn’t think they needed screens until now. Many of them are reacting to dengue cases either in their homes or next door.

Jeff: So the weather shift is affecting demand?

Filly: Massively. June and July are typically more about maintenance work, but now we’re handling full installations. It’s not just about comfort — people are worried about their families, guests, and reputations. Some even call us after someone in the house has gotten dengue. That’s tough.

Jeff: What makes Calibre’s solution different?

Filly: We’ve designed a combo system that integrates glass sliding doors with a built-in mosquito screen — no double frames, no clunky DIY add-ons. The mesh is flat, imported, and tightly tensioned, so it doesn’t bunch up or let bugs through. We only offer three main configurations to keep quality control tight. It’s not a mass product — it’s custom-fit and made to last.

Jeff: What would you say to property managers or developers right now?

Filly: Don’t wait until someone gets sick. It’s an easy thing to install during construction, but even retrofitting is worth it. Our job is to make it look seamless and work long-term. No chemicals, no smell — just a healthier space.

 

A Wake-Up Call for Prevention

We’re now seeing a shift in mindset. It’s no longer enough to rely on mosquito coils and sprays. More homeowners and resorts are opting for structural prevention — especially mosquito screens.

And for good reason: studies from the World Health Organization (WHO) consistently list physical barriers like screens as one of the most effective long-term dengue prevention strategies, especially when combined with water source management.

 

A Note to the Hospitality Industry

If you’re managing a villa, resort, or guesthouse, you’re likely already aware of the pressure to maintain 5-star hygiene and comfort — especially during dengue season. Investing in proper screens is no longer a luxury; it’s fast becoming a duty of care. It could be the difference between a glowing review and a cancelled booking.

 

Final Thoughts

Nature is changing its tune. Bali’s “dry season” might not be as dry as it used to be. With increased rainfall comes increased responsibility — to protect ourselves, our guests, and our communities.

Whether you’re living here, hosting here, or just visiting, take dengue seriously this season. Cover water containers, wear repellent, and if you’re building or renovating — don’t overlook the power of a well-designed mosquito screen.

Stay safe. Stay dry. And if the rain keeps falling… let’s adapt smarter, not just harder.