Cape Town Stargazing & Astronomy Report
Light pollution and stargazing locations near Cape Town
- City
- Cape Town
- Country
- South Africa
- Latitude
- -33.9249
- Longitude
- 18.4241
Key Sky Quality Metrics
- SQM (mag/arcsec²)
- 17.81
- Bortle class
- Class 9 (Class 9)
- Darkness Quotient
- 21%
- Dataset
- April 2026
Inner city sky
Cape Town: The Practical Verdict
Cape Town is a major city in South Africa's Western Cape and its urban light pollution severely limits stargazing opportunities. The sky is classified as Bortle 9, with the Milky Way entirely invisible and faint celestial objects firmly out of reach.
From within the city, visual observations are effectively constrained to the Moon, planets, double stars, and the brighter stars. Imaging possibilities are limited to narrowband techniques, with broadband imaging dominated by light pollution gradients. Observers should also avoid attempting meteor showers or faint nebulae.
For significantly better conditions, travelling to Overstrand Ward 11 in the south-east is recommended. At about 130 km away, it offers Bortle 3 skies where deep-sky observing becomes realistic under much darker skies.
At a Glance
- Overall
- Severe urban sky - This is a severely light-polluted urban sky. Only the Moon, planets, bright stars, and a few specialist targets remain practical.
- Milky Way
- Not visible - The Milky Way is not visible from this sky.
- Best targets from here
- Moon, planets, bright stars, double stars, solar system events, narrowband imaging only with care
- Do not prioritise
- visual deep-sky observing, broadband galaxies, reflection nebulae, widefield Milky Way
- Best nearby upgrade
- Overstrand Ward 11, Western Cape sits about 130 km south east and reaches Bortle 3, roughly 31x darker.
- Good dark window
- Cape Town's longest dark windows fall in June and July, with the shortest nights around December and January. For deep-sky imaging, winter gives the best combination of long nights and true astronomical darkness.
Frequently Asked Questions
Can you see the Milky Way from Cape Town?
No. Cape Town is a Bortle Class 9 sky with SQM 17.81, so the Milky Way is not visible from the city. For Milky Way photography, look for a Bortle 4 or darker site.
What Bortle class is Cape Town?
Cape Town is Bortle Class 9 (SQM 17.81), a severe urban sky for astronomy.
Is Cape Town good for stargazing?
Not for serious deep-sky observing. Cape Town is a severe urban sky where the Moon, planets, and a handful of bright targets are the realistic options from the city itself.
Is Cape Town good for astrophotography?
Broadband deep-sky imaging is heavily compromised from Cape Town and a Bortle 4 or darker site is strongly recommended. Even narrowband imaging is difficult from Cape Town without careful processing.
What can you observe from Cape Town?
Primary targets from Cape Town include Moon, planets, bright stars, double stars, solar system events. Targets such as visual deep-sky observing, broadband galaxies, reflection nebulae are not realistic from this sky.
Where are darker skies near Cape Town?
The closest meaningfully darker mapped site is Stoneybrook Equestrian Estate, Western Cape, about 12 km south south west of Cape Town, reaching Bortle 6.
When is the sky darkest in Cape Town?
The sky over Cape Town is darkest around June, July.
Is light pollution in Cape Town getting better or worse?
Long-term light pollution over Cape Town has been broadly stable across the available measurements.
north - good
Dark sky in the north direction with no obvious skyglow. Suitable for faint-object work at low elevation.
north-north-east - marginal
Noticeable glow on the north-north-east horizon. Stars below about 20 degrees in this direction are dimmed.
north-east - marginal
A diffuse glow sits on the north-east horizon. Faint objects below 20 degrees in this direction are compromised.
east-north-east - marginal
The east-north-east sky shows a clear glow near the ground. Above about 20 degrees the sky returns to workable.
east - marginal
A diffuse glow sits on the east horizon. Faint objects below 20 degrees in this direction are compromised.
east-south-east - marginal
Soft skyglow visible on the east-south-east horizon. Mid-brightness stars survive at low elevation; the faintest do not.
south-east - marginal
Noticeable glow on the south-east horizon. Stars below about 20 degrees in this direction are dimmed.
south-south-east - marginal
The south-south-east lower sky is measurably brighter than the darker quarters. Limit faint work to above about 20 degrees here.
south - fair
A faint diffuse glow on the south horizon. Stars are visible to low elevation, with minor losses near the ground.
south-south-west - fair
Faint glow on the south-south-west horizon. Most stars are visible to low elevation; only the faintest near the ground are affected.
south-west - good
The south-west sky is dark to the horizon. Faint targets are accessible at all elevations here.
west-south-west - good
Dark sky in the west-south-west direction with no obvious skyglow. Suitable for faint-object work at low elevation.
west - good
No noticeable light pollution to the west. The sky in this direction is dark to the horizon.
west-north-west - good
Dark horizon to the west-north-west. Faint stars and extended objects in this direction behave much as they do overhead.
north-west - good
No noticeable light pollution to the north-west. The sky in this direction is dark to the horizon.
north-north-west - good
The north-north-west sky is dark to the horizon. Faint targets are accessible at all elevations here.
zenith - poor
The overhead sky is conspicuously pale. Stars brighter than magnitude 3 are visible; fainter ones are lost.
-
Stoneybrook Equestrian Estate, Western Cape
- Direction
- SSW
- Distance (km)
- 11.6
- SQM
- 19.80
- Bortle
- 6
-
Seaforth, Western Cape
- Direction
- S
- Distance (km)
- 28
- SQM
- 19.54
- Bortle
- 7
-
Overstrand Ward 10, Western Cape
- Direction
- SE
- Distance (km)
- 58.5
- SQM
- 20.33
- Bortle
- 5
-
Swartland Ward 12, Western Cape
- Direction
- NE
- Distance (km)
- 51.2
- SQM
- 19.94
- Bortle
- 6
-
Overstrand Ward 11, Western Cape
- Direction
- SE
- Distance (km)
- 130
- SQM
- 21.54
- Bortle
- 3
-
Cape Agulhas Ward 4, Western Cape
- Direction
- ESE
- Distance (km)
- 161.3
- SQM
- 20.91
- Bortle
- 4