Sun Path & Facing Calculator
See when the sun reaches a unit: pick a place, a date and the way it faces.
The direction the main windows or balcony look out, clockwise from north. Read it off the site plan.
- Sun at 15:00
- Sun’s path that day
- Ground shadows
- Way the unit faces
Ground shadows are a rough flat-ground guide, not a floor or window check. Buildings are OpenStreetMap’s: unbuilt projects are missing and some heights read low.
If your windows face West
Potential direct sun 12:49–18:49
Afternoon sun on 5 Nov, 6h 00m in all.
Lower-angle sun: 15:37–18:49 (3h 12m at 45° or lower, which can reach farther past a window).
Afternoon sun in 2026: every day of the year.
Through the year: about 6h 03m a day, every month.
Directional upper limit. Neighbouring blocks, floor height, balcony overhangs and cloud can cut these hours. Facing varies stack by stack: check the site plan and view the unit.
- At 15:00
- Sun is in front of this facing
- sun in the South-west, 53° up
- Sunrise
- 06:46
- East
- Solar noon
- 12:48
- 73° up, to the south
- Sunset
- 18:50
- West
How to read the sun in Singapore
In Singapore the sun rises within 23° of due east and sets within 23° of due west all year, so east-facing units get morning sun and west-facing units get afternoon sun every day. What changes is which side of the sky it crosses: north of overhead from 24 Mar to 19 Sep, south of overhead otherwise. That is why north and south facings swap between full-day sun and none.
The clock
Across 2026, sunrise falls between 06:47 and 07:16, sunset between 18:51 and 19:21, and the day is 12h 03m to 12h 12m long. Solar noon comes around 12:49–13:18, an hour later than the clock’s twelve, so the “afternoon sun” buyers worry about is the sun after two or three o’clock.
What the tool measures
For the facing you choose, it counts the minutes the sun is both above the horizon and in front of the wall (less than 90° from the direction it faces), then splits them either side of solar noon. It also separates lower-angle sun, no more than 45° up, which can reach farther past a window; actual penetration depends on the window and overhang. The yearly figure counts the days with at least an hour of potential direct sun between 2pm and sunset: the Singapore “west sun”.
What the figures cannot see
Anything between the sun and the wall. A neighbouring tower, a hill or the unit’s own balcony can shade a window the model calls lit, and cloud cuts Singapore’s direct sun a great deal. Read the figures as the ceiling on exposure. The 3D map is a rough ground-level check: it draws flat-ground shadows from OpenStreetMap building footprints and heights, but it cannot tell whether a shadow reaches a particular floor or window. A block with no recorded height looks lower than it is, and terrain is not modelled. A project’s facing also varies stack by stack; confirm the stack on the site plan and view the unit before committing.
Potential direct sun by facing, 2026
Direction-only upper limits computed for Singapore (1.35°N, 103.82°E); every condo is within a few minutes of these. Afternoon-sun days have at least an hour of potential direct sun between 2pm and sunset.
| Facing | 21 Jun | 21 Dec | Afternoon-sun days | When |
|---|---|---|---|---|
| North (N) | 12h 09m · morning and afternoon | 0m · no direct sun | 184 | 22 Mar – 21 Sep |
| North-east (NE) | 7h 42m · morning and afternoon | 4h 12m · morning sun | 0 | never |
| East (E) | 6h 05m · morning sun | 6h 00m · morning sun | 0 | never |
| South-east (SE) | 4h 27m · morning sun | 7h 48m · morning and afternoon | 0 | never |
| South (S) | 0m · no direct sun | 12h 00m · morning and afternoon | 185 | 20 Sep – 23 Mar (over the year end) |
| South-west (SW) | 4h 27m · afternoon sun | 7h 48m · morning and afternoon | 365 | all year |
| West (W) | 6h 04m · afternoon sun | 6h 00m · afternoon sun | 365 | all year |
| North-west (NW) | 7h 42m · morning and afternoon | 4h 12m · afternoon sun | 365 | all year |
Frequently asked questions
Which facing gets the west sun in Singapore?
West-facing units take the afternoon sun every day: in 2026 a west-facing wall in Singapore is in direct sun on 365 of 365 afternoons, south-west on 365 and north-west on 365. East-, north-east- and south-east-facing walls take none (0 days). North- and south-facing walls take it for about half the year each: north 22 Mar – 21 Sep (184 days), south 20 Sep – 23 Mar (over the year end) (185 days). "Afternoon sun" here means at least 60 minutes of direct sun between 2pm and sunset.
When is the sun on the north side in Singapore?
At Singapore's latitude (about 1.4°N) the noon sun stands north of overhead from 24 Mar to 19 Sep 2026, and south of overhead for the rest of the year. A north-facing unit gets its direct sun inside that window and a south-facing unit outside it. East and west facings are not affected: every sunrise of the year is within 23° of due east and every sunset within 23° of due west.
What time does the sun rise and set in Singapore?
Across 2026, sunrise in Singapore falls between 06:47 (22 Oct) and 07:16 (29 Jan), and sunset between 18:51 (25 Oct) and 19:21 (10 Feb). Day length only varies from 12h 03m to 12h 12m. Solar noon, when the sun is highest, comes between 12:49 and 13:18: Singapore's clock runs about an hour ahead of its sun, so "afternoon sun" starts later than 12 o'clock.
How high does the sun get in Singapore?
At solar noon the sun is between 65° and 90° above the horizon: almost directly overhead around the equinoxes, and lowest at the solstices (68° to the north on 21 Jun, 65° to the south on 21 Dec). Lower-angle sun, which can reach farther past a window depending on its geometry and overhang, is therefore an early-morning and late-afternoon matter from the east and west sides all year round.
Does the calculator account for the block next door?
The hours do not. They give a direction-only upper limit from the location's coordinates, so they cannot tell whether a neighbouring tower, a hill or the unit's own balcony overhang shades a window at a given hour, and they do not model cloud cover, which cuts Singapore's direct sun considerably. The 3D map is only a rough ground-level check: it draws flat-ground shadows from OpenStreetMap building footprints and heights, but it cannot tell whether a shadow reaches a particular floor or window. A building with no recorded height is drawn low, terrain is not modelled, and a project not yet built is not drawn. Read the hours as the ceiling on exposure, check the facing of the specific stack on the site plan and view the unit: a project's "facing" varies stack by stack.
How accurate are the times and angles?
Sun positions use the NOAA Solar Calculator equations with approximate atmospheric refraction. The model is suitable for comparing directions and times, but observed sunrise and sunset can vary with atmospheric conditions. All times are Singapore time (UTC+8). Condo locations come from the OneMap geocode of the project's address; a pinned point is exact to where you click.
Weighing up a specific condo? Every Resale Project Scorecard links here with the project pre-selected, and the Resale Price Check prices the unit against actual sales.
Not sure which way a unit faces?
Send us the project and the stack. We’ll tell you its facing and when it gets the sun. Leave your details and we’ll WhatsApp you.
Or write to us first: WhatsApp us the unit
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Disclaimer
Sun times and directions are calculated estimates for general reference only, not advice. The hours are directional upper limits: they do not account for neighbouring buildings, balconies or weather, and a unit’s facing varies stack by stack. Check the developer’s site plan and view the unit before you commit.