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Neoneo13 CC BY-SA 4.0 Wikimedia Commons

Mljet

Island

Mljet island contains Mljet National Park with salt lakes Veliko and Malo Jezero and a 12th‑century monastery on St. Mary islet. Visitors kayak, bike forest trails and stay in quiet villages beside pine‑lined shores.

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In this guide

Mljet essentials

Address: Mljet Island and Mljet National Park, Dubrovnik-Neretva County, Croatia
Website: np-mljet.hr
Hours: Island accessible year-round; national park seasonal opening hours apply
Admission: Park entrance free; boat to the island and national park permits vary-check official site for current fees

About Mljet

Mljet is an island in the Dubrovnik-Neretva archipelago noted for its wooded interior, saltwater lakes and coastal scenery. The island’s western shore contains two closely linked lakes and a small medieval monastery on an islet, which form the focal point for visitors.

The two lakes, Veliko Jezero and Malo Jezero, are linked to the sea and fringed by forested walking paths and viewpoints; a Benedictine monastery stands on a lake islet and is reached by short boat trips. The island includes villages and stretches of quieter coastline beyond the lakes, with walking, cycling and boating as common activities.

Mljet’s protected western area preserves its natural and cultural landscape and is managed to allow visitor access while conserving habitats and historical structures. The island is reached by ferry services from the mainland and nearby islands.

  • National Park: Parts of the island’s western lakes area are protected as a national park and access is managed to balance visitor use with conservation of the lakes and surrounding forest.

What to See#

  • Veliko and Malo Jezero: Veliko Jezero and Malo Jezero are two adjoining saltwater lakes on the island’s western side connected to the sea and surrounded by pine forest and walking trails.
  • St. Mary Islet and Monastery: A small Benedictine monastery and church located on an islet in Veliko Jezero that dates from the medieval period and is reached by boat.
When to Go

Best Time to Visit Mljet

May-September for water activities and full park services; shoulder seasons for quieter hiking and lower ferry traffic.

Late Spring-Early Autumn
May-September · 18-30°C (64-86°F)
Best for swimming, kayaking, and hiking; park services fully operational.
Shoulder Seasons
April, October · 12-22°C (54-72°F)
Quieter beaches and pleasant hiking weather; some guesthouses may reduce services.

Weather & Climate near Mljet

Climate

Mljet's climate is classified as Hot-Summer Mediterranean - Hot-Summer Mediterranean climate with warm summers (peaking in July) and cold winters (coldest in February). Temperatures range from 4°C to 28°C. Moderate rainfall (917 mm/year).

Air Quality: AQI 43 Good
Best Time to Visit
JulyAugustJune
Temperature & Rainfall
Temperature Range
32°
Warmest Month
-2°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Acceptable 5° - 10° 5° 96 mm partly cloudy 71% 4.1 m/s 0.2 low 9.3h
February Acceptable 5° - 10° 5° 86 mm partly cloudy 72% 4.4 m/s 0.4 low 10.4h
March Good 7° - 13° 8° 81 mm partly cloudy 74% 4.3 m/s 0.7 moderate 11.8h
April Very Good 10° - 16° 13° 73 mm partly cloudy 77% 3.8 m/s 1.1 high 13.2h
May Very Good 14° - 22° 18° 55 mm some cloud 76% 3.3 m/s 1.6 very high 14.4h
June Ideal 18° - 26° 22° 44 mm mostly sunny 74% 3.1 m/s 2.0 very high 15.1h
July Ideal 20° - 28° 24° 29 mm clear 69% 3.1 m/s 2.1 extreme 14.8h
August Ideal 20° - 28° 24° 44 mm clear 69% 3.0 m/s 1.8 very high 13.7h
September Excellent 16° - 24° 20° 73 mm some cloud 69% 3.3 m/s 1.1 high 12.3h
October Very Good 13° - 19° 16° 107 mm some cloud 73% 3.6 m/s 0.6 moderate 10.9h
November Acceptable 9° - 15° 12° 122 mm partly cloudy 73% 4.4 m/s 0.3 low 9.6h
December Acceptable 6° - 12° 7° 107 mm partly cloudy 70% 4.6 m/s 0.2 low 9.0h
Getting There & Around

How to Get to Mljet

Ferries and catamarans connect Mljet with Dubrovnik and other Dalmatian ports (seasonal schedules). The national park entrance and boat services are concentrated near Polače and Pomena.

Tips for Visiting Mljet

  • If visiting Mljet National Park, arrive early to rent bikes and tour the lakes before tourist boats arrive
  • Stay overnight on the island if possible-sunset along the salt lakes is quieter and unusually luminous
  • Bring insect repellent for shaded forest trails in summer