Alderney

Island Channel Island in the Bailiwick of Guernsey

Granite cliffs, WWII forts and small harbours characterise Alderney; visitors arrive for coastal walks, seabird colonies (including puffins), quiet beaches, cycling routes and locally caught seafood in a handful of cafés and pubs.

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Alderney is one of the Channel Islands in the English Channel and is administered as part of the Bailiwick of Guernsey. It is a small inhabited island noted for its coastal fortifications and birdlife.

The compact island offers a mix of sheltered harbours, sandy bays and a chain of Victorian and more recent fortifications, plus local museums and nature reserves. Short walks, seabird watching and exploring military architecture are common activities for visitors.

Alderney was strongly fortified in the 19th century and was occupied by German forces during World War II, during which the civilian population was evacuated and extensive defensive works were built. Postwar the island returned to civilian administration and developed modest tourism and local services.

Geographically Alderney sits in the northern group of the Channel Islands off the coast of Normandy and north of Guernsey, accessible by short flights and seasonal ferries from nearby islands and the UK. The landscape is low and windswept with protected harbours on the sheltered north shore.

  • Status and access: Part of the Crown dependency of the Bailiwick of Guernsey, with its own local government and limited seasonal transport links.
  • WWII heritage: The island has visible German World War II fortifications from the 1940-1945 occupation and an island-wide evacuation history worth planning time to explore.

What to See #

  • St Anne's (main harbour): Main settlement and harbour on the sheltered northern shore, serving ferries and the island's shops and services.
  • Victorian forts: A network of well-preserved Victorian forts and gun batteries around the coastline built in the 19th century to defend approaches to the English Channel.
  • Alderney Museum: Local museum documenting island history including occupation, evacuation and prehistory, located near the main village.
  • Longis Common and coastal reserves: A coastal heath and dune system on the island's eastern side noted for seabirds and rare plants.
Alderney
49.7158, -2.1982

How to Get to Alderney #

Alderney is reached by air or sea from neighbouring Channel Islands and the UK. Scheduled flights operate between Alderney and airports such as Guernsey and Southampton (short regional flights), and there are seasonal passenger ferries from Guernsey to Braye Harbour. On arrival the harbour/airfield are within a short taxi ride of island settlements; check seasonal schedules for ferry services.

Tips for Visiting Alderney #

  • Arrive by the Alderney ferry or short flights from Guernsey and plan to land at Braye Harbour; that's the practical arrival point and closest access to the main walking routes and town.
  • Use the island's compact coastal footpaths and the short Alderney Railway service seasonally to move between Braye and the interior - this helps you see WWII fortifications and cliff-top batteries that many visitors miss.
  • Visit in the shoulder months (late spring or early autumn) when seabird colonies and wildflowers are prominent and accommodation is easier to book: Alderney has limited rooms so reserve ahead for summer weekends.

Best Time to Visit Alderney #

Visit Alderney in late spring through summer (May-August) for the most reliable mild weather and island activity.

Summer (best for calm weather and events)
June-August · ~14-20°C
Milder, sunnier months with the most reliable conditions for walking, beaches and island events - also the busiest period.
Spring / autumn (shoulder seasons)
April-May & September-October · ~10-16°C
Pleasant, often breezy weather with fewer visitors - good for hiking and coastal walks while still reasonably mild.
Winter (quiet, wetter)
November-March · ~5-10°C
Cooler, wetter and windier with far fewer tourists; ferry service can be more weather-dependent.

Weather & Climate near Alderney #

Climate

Alderney's climate is classified as Oceanic - Oceanic climate with mild summers (peaking in August) and cold winters (coldest in February). Temperatures range from 5°C to 19°C. Moderate rainfall (890 mm/year).

Best Time to Visit
JulyAugustJune
Temperature & Rainfall
Temperature Range
24°
Warmest Month
Coldest Month
Monthly Conditions

January

January is cold with highs of 9°C and lows of 5°C. Significant rainfall (105 mm), mostly overcast skies, and breezy conditions.

38 Poor

Comfort

Feels Like Cold
C
Temperature
83%
Humidity
Very Humid

Weather

105 mm
Rainfall
8.9 m/s
Wind
Breezy
0.1
UV Index
Low
8.5h daylight

February

February is the coolest month with highs of 8°C and lows of 5°C. Moderate rainfall (78 mm), mostly overcast skies, and breezy conditions.

40 Poor

Comfort

Feels Like Cold
C
Temperature
83%
Humidity
Very Humid

Weather

78 mm
Rainfall
8.2 m/s
Wind
Breezy
0.2
UV Index
Low
9.9h daylight

March

March is cold with highs of 9°C and lows of 6°C. Moderate rainfall (76 mm), mostly overcast skies, and breezy conditions.

50 Acceptable

Comfort

Feels Like Cold
C
Temperature
84%
Humidity
Very Humid

Weather

76 mm
Rainfall
7.4 m/s
Wind
Breezy
0.5
UV Index
Low
11.7h daylight

April

April is cold with highs of 11°C and lows of 7°C. Moderate rainfall (53 mm), partly cloudy skies, and breezy conditions.

58 Acceptable

Comfort

Feels Like Cold
C
Temperature
11°
85%
Humidity
Very Humid

Weather

53 mm
Rainfall
6.7 m/s
Wind
Breezy
0.9
UV Index
Moderate
13.6h daylight

May

May is cool with highs of 14°C and lows of 9°C. Moderate rainfall (52 mm), partly cloudy skies, and breezy conditions.

60 Good

Comfort

11°
Feels Like Cool
11°C
Temperature
14°
87%
Humidity
Very Humid

Weather

52 mm
Rainfall
6.1 m/s
Wind
Breezy
1.3
UV Index
High
15.2h daylight

June

June is cool with highs of 16°C and lows of 12°C. Moderate rainfall (48 mm) and partly cloudy skies.

70 Very Good

Comfort

14°
Feels Like Cool
14°C
Temperature
12° 16°
88%
Humidity
Very Humid

Weather

48 mm
Rainfall
5.6 m/s
Wind
Light Breeze
1.6
UV Index
Very High
16.0h daylight

July

July is cool with highs of 18°C and lows of 14°C. Moderate rainfall (41 mm) and partly cloudy skies.

74 Very Good

Comfort

16°
Feels Like Cool
16°C
Temperature
14° 18°
88%
Humidity
Very Humid

Weather

41 mm
Rainfall
5.6 m/s
Wind
Light Breeze
1.6
UV Index
Very High
15.6h daylight

August

August is cool with highs of 19°C and lows of 14°C. Moderate rainfall (50 mm) and partly cloudy skies.

72 Very Good

Comfort

16°
Feels Like Cool
16°C
Temperature
14° 19°
86%
Humidity
Very Humid

Weather

50 mm
Rainfall
5.6 m/s
Wind
Light Breeze
1.3
UV Index
High
14.2h daylight

September

September is cool with highs of 17°C and lows of 13°C. Moderate rainfall (71 mm), partly cloudy skies, and breezy conditions.

68 Good

Comfort

15°
Feels Like Cool
15°C
Temperature
13° 17°
83%
Humidity
Very Humid

Weather

71 mm
Rainfall
6.5 m/s
Wind
Breezy
0.8
UV Index
Moderate
12.4h daylight

October

October is cool with highs of 15°C and lows of 11°C. Regular rainfall (95 mm), mostly overcast skies, and breezy conditions.

52 Acceptable

Comfort

13°
Feels Like Cool
13°C
Temperature
11° 15°
82%
Humidity
Very Humid

Weather

95 mm
Rainfall
7.8 m/s
Wind
Breezy
0.4
UV Index
Low
10.6h daylight

November

November is cold with highs of 12°C and lows of 8°C. The wettest month with heavy rain (112 mm), mostly overcast skies, and breezy conditions.

48 Poor

Comfort

10°
Feels Like Cold
10°C
Temperature
12°
82%
Humidity
Very Humid

Weather

112 mm
Rainfall
8.4 m/s
Wind
Breezy
0.1
UV Index
Low
8.9h daylight

December

December is cold with highs of 10°C and lows of 6°C. Significant rainfall (109 mm), mostly overcast skies, and breezy conditions.

46 Poor

Comfort

Feels Like Cold
C
Temperature
10°
82%
Humidity
Very Humid

Weather

109 mm
Rainfall
8.7 m/s
Wind
Breezy
0.1
UV Index
Low
8.0h daylight

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