Alexander Archipelago

Island Southeast Alaskan archipelago of densely forested, glaciated islands

Southeast Alaska’s Alexander Archipelago comprises thousands of forested islands and fjords; visitors travel by cruise or floatplane for wildlife, fishing lodges, kayaking and remote coastal communities.

Main image

The Alexander Archipelago is a large group of coastal islands in southeastern Alaska, consisting of roughly 1,000 to 1,100 islands that line the Alaska Panhandle. The islands are largely glaciated in origin and are covered by temperate rainforest, fjords and rugged mountains.

Major islands include Admiralty, Chichagof, Baranof and Prince of Wales, many of which host dense old-growth forest and critical salmon streams. The archipelago offers extensive wilderness, wildlife viewing for species such as brown bears and bald eagles, and marine navigation routes used by ferries and fishing vessels.

The islands are the traditional territories of Tlingit, Haida and Tsimshian peoples and later saw Russian and American activity during the fur trade and resource development eras. Much of the archipelago’s landscape was shaped by repeated glaciation and subsequent sea-level rise that drowned coastal valleys to form the current island chain.

Geographically the Alexander Archipelago runs along the southeastern Alaskan coast between the Gulf of Alaska and the Pacific, forming the inner and outer channels of the Alaska Panhandle. The group stretches for several hundred kilometres and lies adjacent to communities such as Juneau, Sitka and Ketchikan.

  • Scale: The archipelago comprises roughly 1,000 to 1,100 named islands, islets and rocks along southeastern Alaska's coast and forms part of the Alaska Panhandle.
  • Environment: Much of the land falls within the Tongass National Forest and consists of glaciated mountains, fjords, dense temperate rainforest and important salmon and wildlife habitat.

What to See #

  • Admiralty Island: Admiralty Island - a large, forested island known for dense brown bear populations and old-growth temperate rainforest; part of the Tongass National Forest.
  • Chichagof and Baranof Islands: Chichagof and Baranof Islands - among the largest in the group, featuring rugged coastlines, fjords, and extensive temperate rainforest typical of the archipelago.
  • Prince of Wales Island: Prince of Wales Island - one of the largest islands in the archipelago with rugged terrain, salmon streams and remote communities.
Alexander Archipelago
Alexander Archipelago, southeastern Alaska, United States (near Juneau, Ketchikan, Sitka)
56.6667, -134.0833

How to Get to Alexander Archipelago #

Regional airlines serve hub towns (Juneau, Ketchikan, Sitka) and the Alaska Marine Highway ferry system links many islands; private charters and fishing boat transfers are also common. Plan itineraries around ferry schedules, which vary seasonally.

Tips for Visiting Alexander Archipelago #

  • Travel between islands on the Alaska Marine Highway ferry system for the most practical access; schedules are highly seasonal.
  • Plan for limited services: many communities in the archipelago have small stores and few tourist facilities.
  • Bring rain gear and layers - the Alexander Archipelago's weather is maritime and often wet.

Best Time to Visit Alexander Archipelago #

Summer is prime for travel and wildlife viewing; shoulder seasons are quieter but require flexible schedules due to variable ferry services.

Summer
June-August · 8°C-18°C
Best time for sea-kayaking, wildlife viewing (bears and whales) and ferry travel.
Late spring and early autumn
May, September · 5°C-12°C
Fewer visitors and good chances for wildlife; some services begin to close in September.

Weather & Climate near Alexander Archipelago #

Climate

Alexander Archipelago's climate is classified as Oceanic - Oceanic climate with cool summers (peaking in August) and freezing winters (coldest in January). Temperatures range from -3°C to 16°C. Heavy rainfall (4207 mm/year), wettest in October.

Temperature & Rainfall
Temperature Range
16°
Warmest Month
-3°
Coldest Month
Monthly Conditions

January

January is the coldest month with highs of 2°C and lows of -3°C. Heavy rain (421 mm).

Comfort

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

Weather

421 mm
Rainfall
4.3 m/s
Wind
Light Breeze

February

February is cold with highs of 3°C and lows of -2°C. Heavy rain (340 mm).

Comfort

Feels Like Cold
C
Temperature
-2°

Weather

340 mm
Rainfall
4.2 m/s
Wind
Light Breeze

March

March is cold with highs of 4°C and lows of -2°C. Heavy rain (316 mm).

Comfort

Feels Like Cold
C
Temperature
-2°

Weather

316 mm
Rainfall
3.9 m/s
Wind
Light Breeze

April

April is cold with highs of 7°C and lows of 0°C. Heavy rain (262 mm).

Comfort

Feels Like Cold
C
Temperature

Weather

262 mm
Rainfall
3.7 m/s
Wind
Light Breeze

May

May is cold with highs of 10°C and lows of 4°C. Heavy rain (228 mm).

Comfort

Feels Like Cold
C
Temperature
11°

Weather

228 mm
Rainfall
3.3 m/s
Wind
Light Breeze

June

June is cool with highs of 14°C and lows of 7°C. Significant rainfall (185 mm).

Comfort

10°
Feels Like Cool
10°C
Temperature
14°

Weather

185 mm
Rainfall
3.0 m/s
Wind
Light Breeze

July

July is cool with highs of 15°C and lows of 9°C. Significant rainfall (183 mm).

Comfort

12°
Feels Like Cool
12°C
Temperature
15°

Weather

183 mm
Rainfall
2.7 m/s
Wind
Calm

August

August is cool with highs of 16°C and lows of 9°C. Heavy rain (263 mm).

Comfort

12°
Feels Like Cool
12°C
Temperature
16°

Weather

263 mm
Rainfall
2.8 m/s
Wind
Calm

September

September is cold with highs of 12°C and lows of 7°C. Heavy rain (447 mm).

Comfort

10°
Feels Like Cold
10°C
Temperature
12°

Weather

447 mm
Rainfall
3.2 m/s
Wind
Light Breeze

October

October is cold with highs of 8°C and lows of 4°C. The wettest month with heavy rain (639 mm).

Comfort

Feels Like Cold
C
Temperature

Weather

639 mm
Rainfall
3.9 m/s
Wind
Light Breeze

November

November is cold with highs of 4°C and lows of 0°C. Heavy rain (477 mm).

Comfort

Feels Like Cold
C
Temperature
-1°

Weather

477 mm
Rainfall
4.1 m/s
Wind
Light Breeze

December

December is cold with highs of 2°C and lows of -2°C. Heavy rain (446 mm).

Comfort

Feels Like Cold
C
Temperature
-2°

Weather

446 mm
Rainfall
4.4 m/s
Wind
Light Breeze

Nearby Attractions to Alexander Archipelago