YozoraAtlas

How dark is the sky in Split-Dalmatia?

Sky darkness for 3 towns and parks in Split-Dalmatia, worked out from NASA satellite images of light at night (2025). 2 of them have skies of Bortle 4 or darker, where the Milky Way shows overhead. The darkest is Biokovo Nature Park (21.37, Bortle 4), the brightest Split (18.71, Bortle 7). Milky Way season in Split-Dalmatia runs April to August: on moonless nights the bright core stands clear of the horizon, climbing to about 18° at its highest.

19 Bortle class, 1 pristine to 9 city center park or dark-sky place city

Numbers like 21.95 or 16.97 are the brightness of the sky overhead on a clear, moonless night, in mag/arcsec². The scale runs backwards: a lower number means a brighter sky, from about 22 for a natural sky to about 17 in a city center.
How the readings are made

NASA satellite night-lights map of Split-Dalmatia with every place marked

Darkest skies in Split-Dalmatia

  1. Biokovo Nature ParkBortle 421.37
  2. JelsaBortle 420.97

Among the places on this site. Plenty of land between them is just as dark, with no town or park to name it by.

Brightest city skies in Split-Dalmatia

  1. SplitBortle 718.71

All 3 places in Split-Dalmatia

Amber names are parks and certified dark-sky places. The figure is the Bortle class: 1 darkest, 9 city center.
Biokovo Nature Park4Jelsa4Split7