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Dún Laoghaire

Town · Dublin, 🇮🇪 Ireland
Population 23,857
Area 28 km²
Time zone Europe/Dublin
Official website www.dun-laoghaire.com
Dún Laoghaire

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William Murphy / CC BY-SA 2.0

Dún Laoghaire Essentials

Dún Laoghaire’s identity is defined by its massive Victorian harbor, anchored by the East and West Lighthouses. This selection highlights the town's maritime heritage at the National Maritime Museum and its architectural evolution, from the 13th-century Monkstown Castle to the modern dlr LexIcon library. The list features the intricate Celtic Revival art of the Oratory, the Victorian bandstand in People’s Park, and historic granite monuments marking royal visits to this coastal landmark.

12 places
Lord Monkstown / Public domain

Dún Laoghaire Essentials

Dún Laoghaire is a coastal town south of Dublin defined by its Victorian heritage and maritime history. This selection includes the National Maritime Museum, housed in the 19th-century Mariners' Church, and the medieval ruins of Monkstown Castle, established by Cistercian monks. The town's elegant 19th-century urban design is reflected in its public spaces, ranging from the formal People's Park with its Victorian bandstand to the residential garden squares of Clarinda and Crosthwaite Parks.

6 places

Maritime Heritage

Dún Laoghaire’s identity is defined by its massive 19th-century granite harbor. This collection highlights the town's nautical evolution, from the Victorian-era West and East Lighthouses that guide vessels into the deep-water port to the National Maritime Museum, housed in the 1837 Mariners' Church. The list also includes active sailing institutions like the Motor Yacht Club and specialized training schools, reflecting the harbor's dual role as a historic monument and a contemporary center for Irish maritime sports.

6 places

Dún Laoghaire — Map

Dún Laoghaire — Map

Climate & when to visit

Select a month

Typical weather in January

Poor
  • 8° (feels like 3°) · extremes 0°–12°
  • 5° at night
  • 15 rainy days
  • 1 sunny day
  • 2 hours of sunshine per day
  • Dry air
  • Light breeze
  • 9°C · too cold to swim
  • UV index 0 · low

Typical weather in February

Poor
  • 8° (feels like 3°) · extremes 1°–12°
  • 5° at night
  • 14 rainy days
  • 2 sunny days
  • 3 hours of sunshine per day
  • Dry air
  • Light breeze
  • 8°C · too cold to swim
  • UV index 1 · low

Typical weather in March

Poor
  • 10° (feels like 5°) · extremes 1°–13°
  • 5° at night
  • 14 rainy days
  • 4 sunny days
  • 4 hours of sunshine per day
  • Dry air
  • Light breeze
  • 8°C · too cold to swim
  • UV index 2 · low

Typical weather in April

Poor
  • 11° (feels like 7°) · extremes 2°–15°
  • 6° at night
  • 15 rainy days
  • 5 sunny days
  • 6 hours of sunshine per day
  • Dry air
  • Light breeze
  • 9°C · too cold to swim
  • UV index 3 · moderate

Typical weather in May

Fair
  • 14° (feels like 11°) · extremes 5°–18°
  • 9° at night
  • 15 rainy days
  • 5 sunny days
  • 7 hours of sunshine per day
  • Dry air
  • Light breeze
  • 10°C · too cold to swim
  • UV index 5 · moderate

Typical weather in June

Good
  • 17° (feels like 14°) · extremes 9°–20°
  • 12° at night
  • 14 rainy days
  • 3 sunny days
  • 6 hours of sunshine per day
  • Dry air
  • Light breeze
  • 12°C · too cold to swim
  • UV index 5 · moderate

Typical weather in July

Good
  • 18° (feels like 16°) · extremes 11°–22°
  • 13° at night
  • 17 rainy days
  • 2 sunny days
  • 6 hours of sunshine per day
  • Dry air
  • Light breeze
  • 14°C · too cold to swim
  • UV index 5 · moderate

Typical weather in August

Good
  • 18° (feels like 16°) · extremes 11°–21°
  • 13° at night
  • 15 rainy days
  • 2 sunny days
  • 5 hours of sunshine per day
  • Dry air
  • Light breeze
  • 15°C · too cold to swim
  • UV index 4 · moderate

Typical weather in September

Fair
  • 16° (feels like 14°) · extremes 9°–20°
  • 12° at night
  • 14 rainy days
  • 3 sunny days
  • 5 hours of sunshine per day
  • Dry air
  • Light breeze
  • 15°C · too cold to swim
  • UV index 3 · moderate

Typical weather in October

Poor
  • 14° (feels like 10°) · extremes 6°–17°
  • 10° at night
  • 16 rainy days
  • 2 sunny days
  • 3 hours of sunshine per day
  • Dry air
  • Light breeze
  • 14°C · too cold to swim
  • UV index 2 · low

Typical weather in November

Poor
  • 10° (feels like 6°) · extremes 3°–14°
  • 7° at night
  • 16 rainy days
  • 2 sunny days
  • 2 hours of sunshine per day
  • Dry air
  • Light breeze
  • 12°C · too cold to swim
  • UV index 1 · low

Typical weather in December

Poor
  • 9° (feels like 4°) · extremes 1°–13°
  • 5° at night
  • 15 rainy days
  • 0 sunny days
  • 2 hours of sunshine per day
  • Dry air
  • Light breeze
  • 11°C · too cold to swim
  • UV index 0 · low

Climate data: NASA POWER + Copernicus ERA5-Land and ERA5 · 1996–2025

Practical information

Currency
Euro EUR € · Card payments · Widely accepted
Emergency numbers
112
Electricity
Type G
230 V · 50 Hz
Languages
English, Irish
Tap water
Safe to drink
Driving side
Left
Calling code
+353
Learn more

Tours & Activities

National Maritime Museum of Ireland
Walk
People's Park
Walk
Dun Laoghaire East Lighthouse

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