Inishmore

Island Largest Aran Island with prehistoric forts and cliffs

The largest Aran Island, Inishmore features the cliff-top fort Dún Aonghasa, limestone pavements and Irish-speaking villages. Visitors cycle, explore archaeological sites and reach the island by ferry.

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Inishmore (Inis Mór) is the largest of the Aran Islands off County Galway, Ireland, and a focal point for cultural heritage and prehistoric sites. It is the most visited of the Aran Islands and is known for its strong Gaelic traditions and stone-built landscape.

The island’s signature site is the cliff-top prehistoric fort Dún Aonghasa, set on limestone cliffs about 100 metres above the Atlantic, with concentric defensive walls. Visitors also explore karst pavement, small beaches and coastal features such as the tidal pool known as Poll na bPéist.

Inishmore contains a dense array of archaeological remains spanning the Bronze Age to early medieval periods; stone forts, field walls and early Christian sites document long-term human settlement and land use. The island’s cultural landscape has been shaped by pastoral farming and maritime links to the mainland.

Located off the west coast of County Galway, the island is accessed by ferry services from Rossaveal and Doolin; the crossing time varies by route and weather. Inishmore sits west of Galway city within the Atlantic-facing shelf of Connemara.

  • Getting around: Bicycle rentals are a common way to explore the island's network of low-traffic lanes and stone walls; the main circular road around the island is roughly 12 kilometres long.

What to See #

  • Dún Aonghasa: Dún Aonghasa is a prehistoric stone fort perched on a limestone cliff roughly 100 metres above the Atlantic, notable for its concentric dry-stone walls and cliff-edge setting.
  • Poll na bPéist (Wormhole): Poll na bPéist (the Wormhole) is a narrow, naturally carved tidal pool on the island's rugged west coast that is a distinctive coastal feature visited by walkers.

How to Get to Inishmore #

Inishmore (Inis Mór) is reached by passenger ferries from Rossaveal (Ros a’ Mhíl) in Connemara and by services from Doolin in County Clare; both piers have direct sailings to the island’s main harbor. Rossaveal is the ferry terminal serving Galway - it lies roughly 25-35 km west of Galway city - and ferries from Rossaveal land at the island pier (a very short walk to the village). Ferries from Doolin land at the island’s harbour as well and are the other common option from the Clare coast.

Tips for Visiting Inishmore #

  • Choose a morning arrival (ferries from Rossaveal year‑round; passenger service from Doolin is seasonal) so you can cycle or take the island bus to key sites before coach visitors arrive.
  • Rent a bicycle or book a local minibus at Kilronan harbour-most people start from the harbour, and a clockwise loop around the island is practical for managing the prevailing winds and seeing main sites efficiently.
  • Visit Dún Aonghasa early or late in the day to avoid the largest crowds at the cliff fort and to get better light for photos; consider exploring quieter eastern forts and coastal walks afterward.

Best Time to Visit Inishmore #

Visit in late spring to early autumn for the most reliable crossings and the mildest, sunniest conditions.

Summer
June-August · ~13-18°C
Mild temperatures and longest daylight - best time for boat crossings, walking the island and Cliffs of Moher/Ring forts access; busiest months.
Spring and early autumn
April-May, September-October · ~8-13°C
Cooler and breezier with fewer tourists; good for quieter walks and wildlife watching though weather can change quickly.
Winter
November-March · ~4-8°C
Cold, wet and windy with shorter daylight and reduced ferry services; not ideal for casual sightseeing.

Weather & Climate near Inishmore #

Climate

Inishmore's climate is classified as Oceanic - Oceanic climate with mild summers (peaking in August) and cold winters (coldest in February). Temperatures range from 4°C to 18°C. Abundant rainfall (1329 mm/year), wettest in December.

Best Time to Visit
JuneJulyAugust
Temperature & Rainfall
Temperature Range
23°
Warmest Month
Coldest Month
Monthly Conditions

January

January is cold with highs of 9°C and lows of 4°C. Significant rainfall (147 mm), mostly overcast skies, and breezy conditions.

46 Poor

Comfort

Feels Like Cold
C
Temperature
84%
Humidity
Very Humid

Weather

147 mm
Rainfall
6.4 m/s
Wind
Breezy
0.0
UV Index
Low
7.9h daylight

February

February is the coolest month with highs of 9°C and lows of 4°C. Regular rainfall (95 mm), mostly overcast skies, and breezy conditions.

50 Acceptable

Comfort

Feels Like Cold
C
Temperature
84%
Humidity
Very Humid

Weather

95 mm
Rainfall
6.3 m/s
Wind
Breezy
0.1
UV Index
Low
9.6h daylight

March

March is cold with highs of 10°C and lows of 4°C. Regular rainfall (100 mm), mostly overcast skies, and breezy conditions.

48 Poor

Comfort

Feels Like Cold
C
Temperature
10°
84%
Humidity
Very Humid

Weather

100 mm
Rainfall
6.2 m/s
Wind
Breezy
0.4
UV Index
Low
11.7h daylight

April

April is cold with highs of 12°C and lows of 5°C. Moderate rainfall (70 mm) and mostly overcast skies.

54 Acceptable

Comfort

Feels Like Cold
C
Temperature
12°
84%
Humidity
Very Humid

Weather

70 mm
Rainfall
5.2 m/s
Wind
Light Breeze
0.8
UV Index
Moderate
13.8h daylight

May

May is cool with highs of 14°C and lows of 8°C. Regular rainfall (83 mm) and mostly overcast skies.

54 Acceptable

Comfort

11°
Feels Like Cool
11°C
Temperature
14°
84%
Humidity
Very Humid

Weather

83 mm
Rainfall
5.1 m/s
Wind
Light Breeze
1.2
UV Index
High
15.7h daylight

June

June is cool with highs of 16°C and lows of 10°C. Moderate rainfall (77 mm) and mostly overcast skies.

60 Good

Comfort

13°
Feels Like Cool
13°C
Temperature
10° 16°
84%
Humidity
Very Humid

Weather

77 mm
Rainfall
4.9 m/s
Wind
Light Breeze
1.4
UV Index
High
16.7h daylight

July

July is cool with highs of 18°C and lows of 12°C. Regular rainfall (85 mm) and mostly overcast skies.

60 Good

Comfort

15°
Feels Like Cool
15°C
Temperature
12° 18°
85%
Humidity
Very Humid

Weather

85 mm
Rainfall
4.8 m/s
Wind
Light Breeze
1.2
UV Index
High
16.2h daylight

August

August is cool with highs of 18°C and lows of 12°C. Significant rainfall (103 mm) and mostly overcast skies.

58 Acceptable

Comfort

15°
Feels Like Cool
15°C
Temperature
12° 18°
85%
Humidity
Very Humid

Weather

103 mm
Rainfall
4.7 m/s
Wind
Light Breeze
1.0
UV Index
Moderate
14.6h daylight

September

September is cool with highs of 16°C and lows of 10°C. Significant rainfall (126 mm) and mostly overcast skies.

58 Acceptable

Comfort

13°
Feels Like Cool
13°C
Temperature
10° 16°
84%
Humidity
Very Humid

Weather

126 mm
Rainfall
5.3 m/s
Wind
Light Breeze
0.7
UV Index
Moderate
12.5h daylight

October

October is cool with highs of 13°C and lows of 8°C. Significant rainfall (140 mm) and mostly overcast skies.

50 Acceptable

Comfort

11°
Feels Like Cool
11°C
Temperature
13°
84%
Humidity
Very Humid

Weather

140 mm
Rainfall
5.8 m/s
Wind
Light Breeze
0.3
UV Index
Low
10.4h daylight

November

November is cold with highs of 11°C and lows of 6°C. Significant rainfall (151 mm) and mostly overcast skies.

46 Poor

Comfort

Feels Like Cold
C
Temperature
11°
83%
Humidity
Very Humid

Weather

151 mm
Rainfall
5.8 m/s
Wind
Light Breeze
0.1
UV Index
Low
8.4h daylight

December

December is cold with highs of 10°C and lows of 5°C. The wettest month with heavy rain (152 mm), mostly overcast skies, and breezy conditions.

44 Poor

Comfort

Feels Like Cold
C
Temperature
10°
84%
Humidity
Very Humid

Weather

152 mm
Rainfall
6.1 m/s
Wind
Breezy
0.0
UV Index
Low
7.3h daylight

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