Johannesburg
Gauteng, South Africa
Today
Feb 25, 2026
0
/ 100
First Light Index
Poor
Our proprietary metric combining sky clarity, moon interference, and light pollution for optimal stargazing conditions.
0
/ 100
Shutter Score
Fair
Photography-specific metric factoring cloud quality and golden hour potential for landscape shooters.
Light Windows Today
4 AM12 PM11 PM
Sunrise
5:59 AM
Golden: 45min
Sunset
6:42 PM
Golden: 45min
True Darkness
8:01 PM
Stars visible
Add to Calendar
Get reminders for golden hour and dark sky windows
Morning Golden Hour
5:44 AM - 6:29 AM
Evening Golden Hour
6:11 PM - 6:56 PM
Dark Sky Window
8:01 PM onwards
📱 How to use:
- 1. Download the .ics file above
- 2. Open it with your calendar app (iPhone Calendar, Google Calendar, Outlook)
- 3. Events will be added automatically
- 4. You'll get 30-minute reminders before each window
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Moon Phase
56%
Phase
First Quarter
Illumination
56%
⚠️ High Moon Interference
Bright moonlight will wash out faint deep sky objects
Light Pollution
8
Class 1
DarkClass 5
SuburbanClass 9
City
DarkClass 5
SuburbanClass 9
City
Johannesburg Classification
Poor for Astronomy
Bortle Class 8: City Sky
City sky
Visible Tonight
Sky glows whitish gray, only brightest stars visible, M44 invisible
💡 Urban Sky Recommendation
Focus on lunar and planetary observation. Consider driving to a darker location for deep sky work.
💡 Tip: Check "Nearby Dark Sky" section below to find better observing sites within driving distance
Weather Conditions
Cloud Cover
93%
Overcast - poor conditions for photography
Morning
88%
Evening
59%
Overnight
100%
Precipitation
4%
Very unlikely
Wind
9
km/h avg
Gusts up to 25 km/h
🟢 Calm - Excellent for tracking
Humidity
61%
Moderate
Visibility
24.1
km
Excellent clarity
Temperature
28°C
High
/
14°C
Low
Seeing
4
/ 5
Excellent - Atmospheric stability
Transparency
3
/ 5
Clear - Air clarity
Conditions Summary
👍 Good conditions for most observations
Nearby Dark Sky Locations
Within 100km
Makwassie
Bortle
8
3
Dramatic improvement
238.2km·~2h 59min
Driefontein
Bortle
8
3
Dramatic improvement
252.8km·~3h 10min
Tshiame
Bortle
8
3
Dramatic improvement
253.8km·~3h 10min
💡 These locations have significantly darker skies (8 → 3). Expect 32x more visible stars.
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