Sepang 2026 · Race-week update
Will the Sepang F1 Race Be Cancelled Because of the Haze?
By Will Tygart · October 1, 2026 · Filed 2:15pm MYT, updated 11:30pm MYT through race weekend
The direct answer
As of Thursday afternoon, October 1 — with the pit-lane walk already underway — the race is going ahead. No cancellation or postponement has been announced, and the Malaysian government says it expects this weekend's three big events — the F1 race, the Tour de Langkawi, and the Kuala Lumpur marathon — to proceed. Communications Minister Fahmi Fadzil said at a press conference on Wednesday afternoon that Malaysia has also offered firefighting assets to Indonesia, where the smoke is coming from.
The final call belongs to the Ministry of Youth and Sports, which is assessing conditions day by day. SIC CEO Azhan Shafriman Hanif has confirmed there is a threshold API (Air Pollutant Index) value for cancelling or postponing the race — but the circuit has not published the number. So the honest version: the trigger exists, it's undisclosed, and as of today nothing has crossed it.
The circuit itself says it is 100% ready, with nearly 100,000 tickets sold — a record for any race ever held at Sepang. George Russell told Bernama on Thursday that the haze and unsettled weather are not a major obstacle from the drivers' side.
The readings right now
The trend is improving but still unhealthy. Malaysia's official API at 8:00 AM on October 1: Johan Setia 156 (worst in the country), Shah Alam 154, Putrajaya 152, Klang 152, Nilai 153, Cheras 149. Petaling Jaya and Banting had fallen to 99 — back in the Moderate band. Anything above 100 is Unhealthy; above 200 is Very Unhealthy. The count of unhealthy areas nationwide dropped to 8, down from 18 on Wednesday evening and 29–33 on Wednesday morning. Rain overnight helped; it did not clear the air.
At noon on October 1 the same bulletin showed Johan Setia 157, Shah Alam 152, Putrajaya 152, Klang 151. On the US AQI (IQAir), Sepang itself read 86 — Moderate — for the 11am–12pm hour, forecast to stay in the low 80s through Saturday. Kuala Lumpur read 145 (Unhealthy for sensitive groups), with some KL stations spiking into the 160s–170s. So the circuit is currently in meaningfully better air than the city — but 'Moderate' at a racetrack where you'll be breathing hard in 32°C heat is not nothing.
Thursday 6:00 PM MYT update: the official 6pm bulletin showed 32 areas nationwide still in the Unhealthy band. Tasek Ipoh in Perak recorded the highest reading in the country at 186; in Selangor, Johan Setia 165, Shah Alam 158, Banting 154, Petaling Jaya 152, Klang 151. Kuala Lumpur: Cheras 156, Batu Muda 149; Putrajaya 159. The trend across the day: unhealthy but stable, no circuit-area spike, and nothing remotely near the cancellation threshold SIC confirms exists. In a Media Selangor interview on Thursday, SIC CEO Azhan Shafriman Hanif said the circuit is working with NADMA and MetMalaysia and that cloud seeding should pull readings down: "With cloud seeding, we hope the resulting rain will help reduce the haze and that the API level will not be as high as expected." The race remains on.
One academic note, since people keep asking how long this lasts: Universiti Sultan Zainal Abidin's Assoc Prof Azman Azid told Kosmo! the haze could persist into early next year, with rainfall so far not enough to extinguish the Indonesian fires feeding it. This weekend's forecast rain may clear the air temporarily — it won't end the season.
What cloud seeding actually does
SIC is working with the National Disaster Management Agency (NADMA) and the Meteorological Department (MetMalaysia) on cloud seeding around the circuit. Here's the plain version: aircraft or ground generators disperse particles (usually silver iodide or salt) into moisture-heavy clouds to nudge them into producing rain. The rain then scrubs particulates out of the air.
What it can do: pull a storm out of clouds that were almost going to rain anyway, and wash the local air clean for hours. What it can't do: manufacture clouds out of a dry sky, or fix the source — the fires in Indonesia are hundreds of kilometres away. Treat seeding as a helpful local nudge, not a weather-control machine.
Should you still go?
Here's the part official channels won't say plainly. If you have asthma, a respiratory condition, or you're bringing small children or elderly relatives, seriously consider whether a full day in the grandstands is worth it — especially if readings climb back above 100 at the circuit. Nobody will think less of you for watching from a hotel with air-con and a big screen.
If you go: wear an N95 or KN95 mask, not a surgical mask — surgical masks don't seal and do almost nothing against PM2.5 haze particles. Bring spares; they get damp fast in Sepang humidity. Drink water constantly, take shade breaks between sessions, and keep an eye on the AQI each morning — conditions are shifting day to day. The packing guide has the full kit list, and SoyaCincau's race-weekend guide likewise advises carrying both a raincoat and a face mask for exactly this combination of bad air and unpredictable weather.
Watch for the official line, not the rumor line. If the Ministry of Youth and Sports or SIC announces anything, it will come through their official channels — not a forwarded WhatsApp message. We'll update this page as the weekend develops.
The heat hazard: what it means for you
Separate from the haze, the FIA has declared a Heat Hazard for this race under Article B1.5.10 of the sporting regulations — the third time this season after Austria and Monza. The trigger: the official weather service forecasts a heat index above 31.0°C at some point during the race.
What it changes for the drivers: teams must fit the Driver Cooling System components to the cars, and drivers may wear a cooling vest circulating chilled fluid under their race suits. It's optional — drivers who skip it carry 5kg of ballast so nobody gains a weight advantage. Cockpit temperatures can top 40°C, and the rule exists because of the extreme conditions at the 2023 Qatar Grand Prix, where several drivers suffered heat exhaustion.
What it changes for you: nothing official — it's a car-and-driver rule. But take it as the FIA confirming what you'll feel in the stands. The heat index is forecast near 35–37°C on Friday. Drink water before you're thirsty, find shade between sessions, and if you haven't bought tickets yet, favor a covered grandstand. The weather guide has the covered-vs-exposed seating breakdown.
Will Sunday be wet?
The forecasts genuinely disagree, so here's both: AccuWeather puts Sunday's rain chance at 90% (Friday 80%, Saturday 55%), while F1.com's official forecast has Sunday at just 30%. RacingNews365 splits the difference — hot and humid with a real but unquantified shower threat. Tropical forecasts shift fast; check again on race morning.
What a wet Sepang means: this circuit has history. Eight of the nineteen Malaysian Grands Prix (1999–2017) had a wet qualifying or race. In 2009 a downpour red-flagged the race and half points were awarded — the last time that ever happened in F1. In 2012 lightning strikes hit circuit equipment and the TV feed, stopping the race for about 50 minutes. A wet Sunday wouldn't be a disaster for the spectacle; it would be classic Sepang. Just bring the poncho regardless of which forecast you believe.
Quick answers
Is the race even going ahead with the haze this bad?
Yes, as of Thursday afternoon October 1. The government expects it to proceed, the Ministry of Youth and Sports holds the final call, and SIC has confirmed an undisclosed API threshold for cancellation that has not been crossed. Watch official SIC and ministry channels for any change — not forwarded messages.
What should I bring — mask?
An N95 or KN95 mask (surgical masks don't filter haze particles), spares, water, and a raincoat or poncho. SoyaCincau's race-weekend guide advises exactly the mask-plus-raincoat combo. If you have asthma or are bringing small children or elderly relatives, weigh whether a full day trackside is wise if readings rise.
What does the FIA Heat Hazard mean?
It's a driver-safety declaration (heat index forecast above 31°C) letting teams run in-car cooling systems and drivers wear cooling vests. It changes nothing in the rules for spectators — but it confirms the weekend will be brutally hot and humid, so hydrate and seek shade.
Will Sunday's race be wet?
Forecasts disagree: AccuWeather says 90% rain chance, F1.com says 30%. Either way, eight of nineteen Malaysian GPs had wet sessions, and Sepang storms arrive fast. Bring a poncho and assume the forecast will move before lights out.
What's the difference between API and AQI?
API is Malaysia's official Air Pollutant Index; AQI (US) is the scale IQAir and weather apps use. They measure the same pollution but on different scales — Malaysia's noon API readings and IQAir's hourly AQI won't match number-for-number. Above 100 is Unhealthy on both.
Sources and timestamps: IQAir Sepang/Kuala Lumpur readings, 11:00–13:00 MYT Oct 1, 2026; Malaysia APIMS via Media Selangor (Oct 1, noon) and FMT (Oct 1, 6pm); SIC CEO Azhan Shafriman Hanif via Media Selangor (Oct 1); Communications Minister Fahmi Fadzil via Malay Mail/paddocknews24 (Sep 30); FIA Heat Hazard statement via PlanetF1 and RacingNews365 (Sep 30–Oct 1); AccuWeather via scuderiafans.com (Sep 30); F1.com official forecast via f1oversteer. Readings and forecasts change — re-check the morning you travel.
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