Is tonight good for stargazing in Porto Alegre?

Netflix & Chill Night (Too Cloudy). 86% cloud cover — nothing to see tonight. Good time to plan next week. The First Light Index is 3/100, with 73% cloud cover and moon illumination at 56%.

What is the light pollution level in Porto Alegre?

Porto Alegre has a Bortle 9 rating. This is a bright sky area where only the brightest stars and planets are visible. Consider traveling to a darker location for deep sky observation.

When is golden hour in Porto Alegre today?

Morning golden hour is from 5:58 AM to 6:44 AM. Evening golden hour is from 6:30 PM to 7:17 PM. The Shutter Score for photography is 34/100.

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Porto Alegre

Rio Grande do Sul, Brazil

Today

Feb 25, 2026

Poor

Netflix & Chill Night (Too Cloudy)

86% cloud cover — nothing to see tonight. Good time to plan next week.

Tonight's Forecast

/ 100

First Light Index

Poor

Our proprietary metric combining sky clarity, moon interference, and light pollution for optimal stargazing conditions.

/ 100

Shutter Score

Poor

Photography-specific metric factoring cloud quality and golden hour potential for landscape shooters.

Light Windows Today

4 AM12 PM11 PM

Sunrise

6:12 AM

Golden: 47min

Sunset

7:02 PM

Golden: 47min

True Darkness

8:25 PM

Stars visible

Add to Calendar

Get reminders for golden hour and dark sky windows

Morning Golden Hour

5:58 AM - 6:44 AM

Evening Golden Hour

6:30 PM - 7:17 PM

Dark Sky Window

8:25 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

Class 1
DarkClass 5
SuburbanClass 9
City

Porto Alegre Classification

Poor for Astronomy

Bortle Class 9: Inner City Sky

Inner city sky

Visible Tonight

Entire sky brightly lit, only Moon, planets, and brightest stars visible

💡 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

73%

Heavy clouds - limited visibility and light

Morning

41%

Evening

86%

Overnight

88%

Precipitation

89%

Very likely

Wind

km/h avg

Gusts up to 39 km/h

🔴 Windy - Challenging conditions

Humidity

80%

High - May cause haze

Visibility

23.5

Excellent clarity

Temperature

29°C

High

23°C

Low

Seeing

/ 5

Fair - Atmospheric stability

Transparency

/ 5

Hazy - Air clarity

Conditions Summary

🌪️ Poor seeing - Stick to wide-field imaging or wait for better atmospheric stability

Nearby Dark Sky Locations

Within 100km

Estrela

Bortle

Dramatic improvement

220.4km·~2h 45min

Papanduva

Bortle

Dramatic improvement

419.6km·~5h 15min

💡 These locations have significantly darker skies (9 → 2). Expect 128x more visible stars.

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