Melnsils (Livonian: Mustānum) is a small village in Roja Parish, Talsi Municipality in the Courland region of Latvia.

Melnsils camping site is located right by the sea, just 10 km away from Kolka, near the Slītere National Park, the sea-cliffs, and fascinating walking paths in the woods.

Melnsils camping site is ideal for recreational activities and organization of sports events for up to 300 persons.

The continental climate prevails in the area.

The warmest month is August, when the average temperature is 17 °C, and the coldest is January, with -4 °C.