Semichi Islands

Islands Aleutian island group in western Alaska, remote

The Semichi Islands in the Aleutians host dense seabird colonies and marine mammals; visitors reach them by expedition cruise or charter for wildlife photography and remote birding.

Main image
Semichi Islands
52.7326, 174.0111

How to Get to Semichi Islands #

Access is by small boat or charter aircraft from larger Aleutian hubs such as Adak or Unalaska; services are infrequent and weather-dependent-arrange with experienced local operators.

Tips for Visiting Semichi Islands #

  • If planning a visit, coordinate with local Aleut or tribal authorities and check wildlife advisories-avian and marine life are sensitive to disturbance.
  • Bring cold-weather gear even in summer-the Aleutian climate is unpredictable and can be harsh.
  • Most islands have no facilities; arrange self-sufficient transport and emergency communications.

Best Time to Visit Semichi Islands #

Best travelled in the short Alaskan summer when sea conditions are least severe and daylight is long; travel remains logistically challenging.

Summer
June-August · 5-12°C
Calmer seas and the most practicable time for inter-island travel and wildlife viewing.
Shoulder seasons
May, September · 0-10°C
Cooler with more variable weather; fewer visitors but increased risk of rough seas.

Weather & Climate near Semichi Islands #

Climate

Continental climate with cold summers (peaking in August) and cold winters (coldest in January). Temperatures range from -1°C to 11°C. Moderate rainfall (806 mm/year).

Temperature & Rainfall
Temperature Range
11°
Warmest Month
-1°
Coldest Month
Monthly Conditions

January

January is the coolest month with highs of 2°C and lows of -1°C. Moderate rainfall (63 mm) and breezy conditions.

Comfort

Feels Like Cold
C
Temperature
-1°

Weather

63 mm
Rainfall
9.1 m/s
Wind
Breezy

February

February is the coolest month with highs of 2°C and lows of -1°C. Moderate rainfall (49 mm) and breezy conditions.

Comfort

Feels Like Cold
C
Temperature
-1°

Weather

49 mm
Rainfall
9.1 m/s
Wind
Breezy

March

March is cold with highs of 2°C and lows of -1°C. Moderate rainfall (47 mm) and breezy conditions.

Comfort

Feels Like Cold
C
Temperature
-1°

Weather

47 mm
Rainfall
8.8 m/s
Wind
Breezy

April

April is cold with highs of 3°C and lows of 0°C. Moderate rainfall (45 mm) and breezy conditions.

Comfort

Feels Like Cold
C
Temperature

Weather

45 mm
Rainfall
8.0 m/s
Wind
Breezy

May

May is cold with highs of 5°C and lows of 2°C. Moderate rainfall (43 mm) and breezy conditions.

Comfort

Feels Like Cold
C
Temperature

Weather

43 mm
Rainfall
6.9 m/s
Wind
Breezy

June

June is cold with highs of 7°C and lows of 4°C. Moderate rainfall (44 mm) and breezy conditions.

Comfort

Feels Like Cold
C
Temperature

Weather

44 mm
Rainfall
6.1 m/s
Wind
Breezy

July

July is cold with highs of 9°C and lows of 7°C. Moderate rainfall (70 mm).

Comfort

Feels Like Cold
C
Temperature

Weather

70 mm
Rainfall
5.6 m/s
Wind
Light Breeze

August

August is cold with highs of 11°C and lows of 9°C. The wettest month with 99 mm of rain and breezy conditions.

Comfort

10°
Feels Like Cold
10°C
Temperature
11°

Weather

99 mm
Rainfall
6.0 m/s
Wind
Breezy

September

September is cold with highs of 11°C and lows of 7°C. Moderate rainfall (78 mm) and breezy conditions.

Comfort

Feels Like Cold
C
Temperature
11°

Weather

78 mm
Rainfall
6.7 m/s
Wind
Breezy

October

October is cold with highs of 8°C and lows of 4°C. Regular rainfall (96 mm) and breezy conditions.

Comfort

Feels Like Cold
C
Temperature

Weather

96 mm
Rainfall
8.0 m/s
Wind
Breezy

November

November is cold with highs of 5°C and lows of 1°C. The wettest month with 99 mm of rain and breezy conditions.

Comfort

Feels Like Cold
C
Temperature

Weather

99 mm
Rainfall
9.5 m/s
Wind
Breezy

December

December is cold with highs of 3°C and lows of 0°C. Moderate rainfall (73 mm) and breezy conditions.

Comfort

Feels Like Cold
C
Temperature

Weather

73 mm
Rainfall
9.2 m/s
Wind
Breezy

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