Dark Sky Odds

Where and when is the sky darkest in Europe?

Of 465 International Dark Sky Places and national parks in Europe, Garajonay National Park has the most clear, moonless hours of full darkness among those darker than half of Europe’s land, 1,006 a year (ERA5, 2006–2025); the darkest sky we measured is at Coll, darker than 99.9% of Europe’s land (NASA VIIRS 2025).

How it works ↓

CollRùmNorth RonaldsayGotska Sandön National ParkSlītere National ParkFemundsmarka National ParkTöfsingdalen National ParkHardangervidda National ParkFulufjället National ParkGutulia National ParkKerryBardsey IslandCairngorms National ParkSonfjället National ParkConnemara National ParkGarajonay National ParkMonfragüe National ParkSamaria National ParkCabañeros National ParkSierra Nevada National and Natural ParkTablas de Daimiel National ParkAinos National ParkPantelleria National ParkCaldera de Taburiente National ParkSila National ParkGennargentu National ParkCabrera National ParkEvros Delta National ParkSkiritida forestPort-Cros National Park
Most clear dark hours a year (places darker than half of Europe) Darkest skies

Data updated: 31 December 2025 · Sources and licences

Calculated 5 November 2026 · cloud cover ERA5 2006–2025 · night lights NASA VIIRS 2025

You choose a stargazing spot by two numbers, and they often disagree. The first: clear moonless dark hours a year, when the Sun is below −18°, the Moon is below the horizon and cloud cover is no more than 20% (ERA5, 2006–2025). The second: light pollution, how much darker a place’s sky is than the rest of Europe’s land in NASA’s VIIRS night images from 2025. The calculation is described on the how we calculate page. The map and search on this page will show you the nearest places.

The south is clear, the north is dark

Garajonay National Park gets 1,006 clear dark hours a year, with August the best month, though it is darker than only 60% of Europe’s land. Monfragüe National Park has 778 hours. Coll is darker than 99.9% of Europe’s land, but there are just 80 clear dark hours a year, with April the best month. You can find places in your country on the United Kingdom and Germany pages.

Meteors and the Moon

For the Geminids on 14 December 2026, the Moon is 25% lit; for the Quadrantids on 4 January 2027, 12%. The Moon at 86% will get in the way of the Perseids on 13 August 2027. All meteor showers are listed on the meteor showers page. This is climate, not a forecast; check the weather forecast before you set off.

Countries

Most clear dark hours a year (places darker than half of Europe)

PlaceBest monthClear moonless dark hours a yearDarker than…Country
Garajonay National Park
national park
August1,00660%Spain
Monfragüe National Park
national park
August77874%Spain
Samaria National Park
national park
August75877%Greece
Cabañeros National Park
national park
August74781%Spain
Sierra Nevada National and Natural Park
national park
August73857%Spain
Tablas de Daimiel National Park
national park
August72757%Spain
Ainos National Park
International Dark Sky Park · national park
August72350%Greece
Pantelleria National Park
national park
August72154%Italy
Caldera de Taburiente National Park
national park
August70883%Spain
Sila National Park
national park
August70153%Italy
Gennargentu National Park
national park
August69772%Italy
Cabrera National Park
national park
August67778%Spain
Evros Delta National Park
national park
August67150%Greece
Skiritida forest
national park
August66456%Greece
Port-Cros National Park
national park
December66061%France

Darkest skies

PlaceBest monthClear moonless dark hours a yearDarker than…Country
Coll
International Dark Sky Community
April8099.9%United Kingdom
Rùm
International Dark Sky Sanctuary
March9799.9%United Kingdom
North Ronaldsay
International Dark Sky Community
March4999.9%United Kingdom
Gotska Sandön National Park
national park
March16799.8%Sweden
Slītere National Park
national park
March15098%Latvia
Femundsmarka National Park
national park
March7498%Norway
Töfsingdalen National Park
national park
March8698%Sweden
Hardangervidda National Park
national park
January8298%Norway
Fulufjället National Park
national park
March15697%Sweden
Gutulia National Park
national park
March9097%Norway
Kerry
International Dark Sky Reserve
March9897%Ireland
Bardsey Island
International Dark Sky Sanctuary
March14897%United Kingdom
Cairngorms National Park
national park
April3697%United Kingdom
Sonfjället National Park
national park
March14096%Sweden
Connemara National Park
national park
March8696%Ireland

Meteor showers

How we calculate