Haze Season & PSI Forecaster
Malaysia haze comes from Indonesian peat fires, usually August–October. It affects Sarawak and KL more than Penang. This tool tells you which month to expect it, what API/PSI levels mean for your trip, and when schools close (which affects hotel availability).
Your trip
What this solves
"When is haze season?" gets asked in travel forums every year. The honest answer: it varies by year, but the typical window is August–October with worst events in September. What travel guides skip:
- API 300+ events happen 1–3 times a year in bad years (2015, 2019, 2023).
- West coast cities (KL, Selangor) get hit harder than Penang (further from source).
- Sarawak is closer to the source — haze arrives earlier and lingers longer.
- N95 masks matter. Surgical masks don't filter fine particulate (PM2.5).
- School closures happen at API 200+. That means parents scramble for childcare, hotel prices spike.
How to read results
- Haze outlook: low / moderate / high / severe risk for the month.
- Typical PSI: what you can expect on a normal day vs a bad day.
- Action: what to bring, what to plan around.
Limitations
- This is climatology, not a real-time forecast. Check real-time API closer to your trip.
- Haze is unpredictable — depends on Indonesian fire activity, monsoon winds, rainfall.
- Some haze days are localised (urban pollution). API readings vary station to station.
FAQ
Is Penang safe from haze?
Relatively — Penang's northern position and sea breezes keep it cleaner than KL in most events. But 2015 and 2023 still affected Penang significantly.
Should I cancel my trip if there's haze?
Only if API is forecast to hit 300+ for multiple days. At 100-200, you can still enjoy your trip with N95 and indoor backup plans.
Do hotels have air purifiers?
Most international hotels do. Local 3-star and below often don't. Ask before booking if you're sensitive.
Sources
- Department of Environment (DOE) Malaysia — API readings
- AQICN — real-time PM2.5 data
- BMKG Indonesia — fire hotspot tracking (source)