Formula 1 returns to Marina Bay Street Circuit this weekend from October 9 to 11. The Singapore Grand Prix 2026 will bring weather just as challenging as the track itself, as drivers and teams will face a sauna-like environment with daytime temperatures soaring between 31°C and 33°C. Meanwhile, there’ll be an oppressive humidity of over 80% this weekend. Already, the Singapore GP is one of the toughest physical endurance tests on the F1 calendar due to extreme heat. Plus, the debut of the Sprint Race format in Marina Bay adds to the pressure for teams. See the timetable here. But for now this is what the F1 Singapore weather forecast looks like.
Singapore’s F1 weather outlook
The Singapore weather forecast predicts Friday’s practice sessions and Saturday’s inaugural Singapore Sprint and Grand Prix Qualifying will likely remain dry. This offers optimal conditions for high-speed runs and crucial tire strategy.
However, the weather outlook for October 11’s main event paints a very different picture. There’s a significant threat of heavy, thundery showers rolling in during the early evening. Therefore, the water and reduced visibility could easily disrupt strategies, trigger delays, or force the race to begin on intermediate tires.
Additionally, the recent regional haze is another problem as race weekend approaches. Singapore’s 24-hour Pollutant Standards Index (PSI) has breached the unhealthy range across the island again this week. In fact, experts note that these smoky conditions may continue throughout October.
Despite the poor air quality, there is no indication that the 2026 Singapore Grand Prix will be postponed or cancelled. Plus, Formula 1 has successfully raced through hazy conditions at Marina Bay in the past.
If you’re one of the thousands of fans descending on Marina Bay this weekend, be sure to check out our haze guide on how to protect yourself. Additionally, pack a raincoat or lightweight poncho as umbrellas are banned in the grandstands. More to follow on the F1 Singapore weather forecast.
