By the WahLiao desk · Last verified 28 September 2026
Singapore’s heat catches visitors out more than anything else. Do outdoor sightseeing before 11am and after 4pm, drink water every hour, and use the city’s covered walkways, underground links and air-conditioned malls in between. Check the official heat stress level (low, moderate or high) on the NEA’s myENV app before a long walk. The government’s own advice notes that people who have just arrived from cooler climates face higher risk.
The thermometer tells only half the story here. Humidity stops sweat from cooling you, so 32°C in Singapore feels harder than 32°C somewhere dry. The good news is that the city is built for it: shade, shelter and air-conditioning are never far away.
Singapore heat: quick facts
| Typical days | Highs around 31 to 32°C, high humidity, all year |
| Official measure | The Heat Stress Advisory, based on the Wet Bulb Globe Temperature (WBGT) |
| Levels | Low (green), moderate (amber) and high (red) |
| Where to check | The myENV app or weather.gov.sg, with readings from the nearest station |
| Best hours outdoors | Before 11am and after 4pm |
| Water | Tap water is safe; refill a bottle everywhere |
The WahLiao Verdict
| The rule | Outdoors early and late, indoors at midday. |
| What helps most | Water, shade, and a slower pace on your first two days. |
| The mistake | Walking Marina Bay at 1pm on the day you land. |
| Higher risk | New arrivals from cooler places, older people, young children, and anyone unwell or pregnant. |
| Get help | For confusion, fainting or a very high temperature, call 995. |
The official heat stress levels
Since 2023, Singapore has published a Heat Stress Advisory with three levels: low, moderate and high. It uses the Wet Bulb Globe Temperature, which combines air temperature, humidity, wind and sunshine to show how hot the body actually feels. Readings come from stations across the island and update every 15 minutes on the myENV app and weather.gov.sg. In 2025, high heat stress was recorded on 29 days.
The Ministry of Sustainability and the Environment lists the groups at higher risk: older people, children and infants, people who are ill or have chronic conditions, pregnant women, outdoor workers, and people who have recently travelled from cooler climates. That last group is most visitors.
How to plan a hot day
- Go out early. The Botanic Gardens open at 5am; the waterfront is kindest before 11am.
- Move indoors at midday. The Gardens by the Bay domes, museums, Jewel and the malls are cool and worth seeing.
- Rest in the afternoon. A shower and an hour at the hotel make the evening better.
- Go out again after 4pm. The free light shows at Marina Bay start after dark.
Our 3-day itinerary is built on this rhythm.
Drink, dress and shelter
Drink water every hour, even when you are not thirsty, and more if you are walking. Tap water is safe, so carry a bottle and refill it. Wear loose, light clothes and a hat, and use sunscreen. Walk through covered walkways and underground links where you can; much of the city centre is connected. What to Wear in Singapore has the packing list.
Warning signs
Headache, dizziness, nausea, confusion and heavy sweating are signs of heat stress. Stop, get into shade or air-conditioning, drink water and cool down. If someone becomes confused, faints or stops sweating while very hot, call 995 for an ambulance. Healthcare for Visitors explains where to get help.
Singapore heat: FAQ
How hot is Singapore?
Daytime highs are around 31 to 32°C all year, with high humidity. Hot spells can bring higher temperatures.
How can I check the heat level in Singapore?
Use the NEA’s myENV app or weather.gov.sg, which show the Heat Stress Advisory level (low, moderate or high) from the nearest station.
When is the best time to be outdoors in Singapore?
Before 11am and after 4pm. Spend the middle of the day indoors.
Is it safe to walk around Singapore in the heat?
Yes, with care: drink often, rest in shade and air-conditioning, and avoid long walks in the midday sun, especially on your first days.
Read next
This page belongs to Visiting Singapore, our guide for first-time visitors. For the weather through the year, read Best Time to Visit Singapore and Singapore Weather by Month.
Sources checked 28 September 2026: Ministry of Sustainability and the Environment and NEA, Heat Stress Advisory; Ministry of Sustainability and the Environment, written reply on heat stress; The Straits Times via Asia News Network on the advisory’s levels and symptoms. This page is general information, not medical advice. Last updated 28 September 2026.
