Coastal: another tenth of the area's land sits below the safety line (3 m above mean sea level plus projected sea-level rise). Heat: 30 or more days a year at or above 35°C. Flash-flood downpours: days with 50 mm or more of rain across Singapore reach 1.5 times their 1995–2014 level; one date for every area, since the rain model can't tell neighbouring areas apart. For local flooding, see PUB's list below. Mortgage and lease are counted from today.
If you own in Sembawang
The heat date falls inside a 30-year mortgage.
2026TodayAbout 5% of the land is below the safety line, protected by seawalls, tidal gates and drains.
2033Heat date · 7 years30 or more days a year at or above 35°C.
205630-year mortgage endsIf taken out today.
2090Flash-flood downpours · 64 yearsIsland-wide, days with 50 mm or more of rain reach 1.5 times their 1995–2014 level.
212599-year lease endsIf it started today. Count from your own start date.
2150CoastalNo coastal date by here, which is as far as the sea-level data goes.
What to raise with your managing agent or town council
What is the ground level of our block, in metres above mean sea level?
How high is the basement carpark entrance above the road?
When is coastal protection planned for this stretch of coast?
Is our street one of the 1 flood-prone area or hotspot PUB lists in Sembawang?
If you are buying in Sembawang
7 questions to take to a viewing.
Sea level: not before 2150
Little of the land is low-lying: 5% is below the safety line today and 9% by 2100.
What is the ground level of this block, in metres above mean sea level?
Is there a basement carpark or basement unit, and how high is its entrance above the road?
When is coastal protection planned for this stretch of coast, and has PUB's study for it been completed?
Flash floods: inside a 99-year lease
PUB lists 1 flood-prone area or hotspot in Sembawang. Island-wide, days with 50 mm or more of rain go from 6.6 to 8.7 a year by 2100, reaching 1.5 times their 1995–2014 level by 2090.
PUB lists 1 flood-prone area or hotspot in Sembawang. Is this street one of them, and has its drainage been upgraded?
Has the carpark or ground floor ponded in heavy rain before?
Heat: inside a 30-year mortgage
Days at or above 35°C go from 21 to 119 a year by 2100, passing 30 a year by 2033.
Which way does the unit face, and how much afternoon sun does it take?
How much shade and greenery is there around the block?
The numbers
Today
2050
2100
Land below the safety line
5%
6%
9%
Days at or above 35°C a year
21
46
119
Days with 50 mm or more of rain a year, island-wide
6.6
7.6
8.7
At today's pace of emissions (SSP2-4.5). "Today" is modelled, not measured. Sembawang covers 12.6 km² with a median ground height of 7.8 m.
PUB flood-prone areas and hotspots in Sembawang
Admiralty Road West (from Sembawang Drive to Dock Road West) (flood-prone area)
Hotter than most of 55 areas by day; cooler than most at night. Satellite readings of the ground surface, not the air: Landsat by day (2016–2025), MODIS at night, ESA WorldCover for trees. They describe today, not a forecast.
An independent project, not produced or endorsed by CCRS, NEA, PUB, URA or any government agency. Low land in Singapore is protected today by seawalls, tidal gates and drains; these dates show when more of it will depend on that protection. Prompts, not property, insurance or investment advice.