Unalaska Island

Island Aleutian island hosting the major Dutch Harbor port

Aleutian Island hosting Dutch Harbor, the region’s major fishing port; visitors come for commercial fishing history, WWII sites, seabird colonies and cold-water seafood. Access via Unalaska/Dutch Harbor airport and ferry connections.

Main image

Unalaska Island is part of the Aleutian island chain in Alaska and hosts the town of Unalaska and the port complex known as Dutch Harbor. The island is a principal centre for commercial fishing in the region and for Aleutian maritime operations.

Rocky coastlines, deep harbours and frequent maritime weather define the local landscape; significant features include the built harbour facilities and the volcanic cone of Makushin. The island supports fisheries infrastructure, cold-water marine wildlife and rugged coastal scenery visited by fishermen and seasonal tourists.

Dutch Harbor grew into a major fishing port in the 20th century and the island saw military activity and fortifications during World War II, including the June 1942 attack that marked the Aleutian campaign. The island’s economy has long been dominated by seafood harvesting and processing.

Unalaska Island lies in the eastern Aleutians between the Bering Sea and the North Pacific, administratively part of the Aleutians West region of Alaska. It is remote from Alaska’s main population centres and is accessed by air and sea services serving the Bering Sea fisheries.

  • Fishing industry: One of the busiest commercial fishing hubs in Alaska, with large crab and groundfish fleets operating from its harbours.
  • World War II history: Site of a Japanese attack in June 1942 during World War II; wartime fortifications and related sites remain of historical interest.

What to See #

  • Dutch Harbor: Major fishing port and harbour complex that handles large volumes of seafood, commonly referred to as Dutch Harbor by the fishing industry.
  • Unalaska town: Administrative centre and community on the island, with services, housing and transport links for the wider archipelago.
  • Makushin Volcano: Prominent volcanic massif on the island with visible fumarolic activity and a recognizable conical profile; a notable natural landmark on the island.
Unalaska Island
53.6733, -166.6483

How to Get to Unalaska Island #

Unalaska (Dutch Harbor) is reached by air from Anchorage; Alaska Airlines operates flights (schedules vary seasonally). There are no road connections off the island; ferries and freighters visit intermittently.

Tips for Visiting Unalaska Island #

  • If visiting Unalaska, book flights early - Alaska Airlines is the main carrier to Dutch Harbor and schedules can change with weather.
  • Pack waterproof gear; weather changes quickly and drizzle is common even in summer.
  • Respect local fishing operations and wildlife regulations - commercial fishing dominates the island economy and certain areas are restricted.

Best Time to Visit Unalaska Island #

Summer (June-August) is the best time for access and wildlife viewing; always expect sudden fog and wind.

Summer
June-August · 5-12°C
Relatively mild weather, long daylight and prime time for seabird and whale watching.
Spring/Autumn
May, September-October · 0-8°C
Shoulder seasons are quieter but weather turns stormy quickly.
Winter
November-March · -5-2°C
Harsh conditions, heavy seas and limited services; not recommended for casual visitors.

Weather & Climate near Unalaska Island #

Climate

Unalaska Island's climate is classified as Tundra - Tundra climate with cold summers (peaking in August) and freezing winters (coldest in March). Temperatures range from -5°C to 10°C. Abundant rainfall (1615 mm/year), wettest in October.

Temperature & Rainfall
Temperature Range
10°
Warmest Month
-5°
Coldest Month
Monthly Conditions

January

January is freezing with highs of 0°C and lows of -4°C. Significant rainfall (152 mm) and breezy conditions.

Comfort

-2°
Feels Like Freezing
-2°C
Temperature
-4°

Weather

152 mm
Rainfall
6.3 m/s
Wind
Breezy

February

February is freezing with highs of -1°C and lows of -4°C. Significant rainfall (166 mm) and breezy conditions.

Comfort

-3°
Feels Like Freezing
-3°C
Temperature
-5° -1°

Weather

166 mm
Rainfall
6.2 m/s
Wind
Breezy

March

March is the coldest month with highs of -2°C and lows of -5°C. Significant rainfall (132 mm).

Comfort

-3°
Feels Like Freezing
-3°C
Temperature
-5° -2°

Weather

132 mm
Rainfall
5.5 m/s
Wind
Light Breeze

April

April is freezing with highs of -1°C and lows of -4°C. Significant rainfall (106 mm).

Comfort

-3°
Feels Like Freezing
-3°C
Temperature
-4° -1°

Weather

106 mm
Rainfall
5.5 m/s
Wind
Light Breeze

May

May is freezing with highs of 2°C and lows of -2°C. Significant rainfall (116 mm).

Comfort

Feels Like Freezing
C
Temperature
-2°

Weather

116 mm
Rainfall
4.9 m/s
Wind
Light Breeze

June

June is cold with highs of 5°C and lows of 1°C. Regular rainfall (87 mm).

Comfort

Feels Like Cold
C
Temperature

Weather

87 mm
Rainfall
4.9 m/s
Wind
Light Breeze

July

July is cold with highs of 9°C and lows of 4°C. Moderate rainfall (69 mm).

Comfort

Feels Like Cold
C
Temperature

Weather

69 mm
Rainfall
4.8 m/s
Wind
Light Breeze

August

August is cold with highs of 10°C and lows of 5°C. Regular rainfall (80 mm).

Comfort

Feels Like Cold
C
Temperature
10°

Weather

80 mm
Rainfall
4.9 m/s
Wind
Light Breeze

September

September is cold with highs of 7°C and lows of 3°C. Significant rainfall (149 mm).

Comfort

Feels Like Cold
C
Temperature

Weather

149 mm
Rainfall
5.9 m/s
Wind
Light Breeze

October

October is cold with highs of 4°C and lows of -1°C. The wettest month with heavy rain (207 mm) and breezy conditions.

Comfort

Feels Like Cold
C
Temperature
-1°

Weather

207 mm
Rainfall
6.1 m/s
Wind
Breezy

November

November is freezing with highs of 2°C and lows of -3°C. Significant rainfall (179 mm) and breezy conditions.

Comfort

-1°
Feels Like Freezing
-1°C
Temperature
-3°

Weather

179 mm
Rainfall
6.6 m/s
Wind
Breezy

December

December is freezing with highs of 0°C and lows of -4°C. Significant rainfall (172 mm) and breezy conditions.

Comfort

-2°
Feels Like Freezing
-2°C
Temperature
-4°

Weather

172 mm
Rainfall
6.3 m/s
Wind
Breezy

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