Clifden (Connemara) weather in August

August in Clifden: cool, rainy, with clean air — fine if you can take 20 rainy days.

Updated September 2026 · climate normals from ERA5 reanalysis

Clifden🇮🇪 Ireland · British Isles · Trekking79
  1. 58Jan
  2. 60Feb
  3. 70Mar
  4. 82Apr
  5. 87May
  6. 85Jun
  7. 84Jul
  8. 79Aug
  9. 77Sep
  10. 67Oct
  11. 62Nov
  12. 54Dec

#5 of 12 months in Clifden · #712 of 1413 destinations to visit in August · comfort 79/100 (tier B)

Days
17°C
Nights
13°C
Wet days
20
Sun
9.4 h
Humidity
83%
Daylight
15 h
Clifden, Ireland
Photo: Daniel Wells · Pexels

Traveller notes on Clifden in August

Clifden-forum threads on August weather and packing are consistent that Connemara stays genuinely unpredictable even at the height of summer, real odds of rain on any given day alongside stretches of proper sunshine, sometimes within the same afternoon. A light waterproof coat and sensible walking shoes are the standing packing essentials regardless of the forecast before the trip. Posters describe the town as easily worth several days on its own, plenty of shops and restaurants to fall back on if a wet spell sets in, with the wider Connemara countryside the real draw once conditions clear. Regulars visiting repeatedly in August describe genuinely enjoying the month despite the unreliable weather. Wind off the Atlantic is a near-constant feature worth factoring into any coastal walk. The record: 17.3C days feeling like 15C, 13.4C nights, an extraordinarily high 126mm across over 20 days, a 16.6C sea and 83 percent humidity.
ClifdenAugustRegular · August · 1 month ago · Read more on Tripadvisor ↗

Other months in Clifden

Clifden-forum threads on an end-of-March visit describe weather as genuinely iffy this time of year, posters planning a Connemara stay while asking specifically about ferry service to Inishbofin given the uncertain conditions. Regulars call driving in from Shannon Airport and covering Roundstone along the way a real standard route, several posters planning exactly this itinerary for a March arrival. Posters recommend Kylemore Abbey as a genuine highlight regardless of exact March weather, considered worthwhile even on a grey day. Regulars call jacket requirements a real recurring question this time of year, several threads specifically discussing what to pack for a March Connemara trip. Posters recommend building real flexibility into a March itinerary, ferry and outdoor plans here capable of shifting based on the day's conditions. The record: 9.7C days feeling like 8C, 5.2C nights, an extraordinarily high 105.2mm across over 17 days and 82 percent humidity.
ClifdenMarchRegular · March · 1 month ago · Read more on Tripadvisor ↗
Clifden-forum threads on winter travel to Connemara describe the weather as genuinely far from warm and sunny, posters calling the wider region beautiful but capable of feeling wild and isolated this time of year. Regulars call Clifden a real exception, a genuinely year-round, living town that makes a solid winter mini-break base regardless of the surrounding weather. Posters recommend a light waterproof coat and sensible shoes as the minimum outdoors. Regulars call the weather the biggest obstacle to hiking plans, flexible scheduling considerably more useful than a fixed itinerary. Posters describe the coastal ferry services as running year-round but weather dependent, checking current status before relying on one worthwhile. Regulars call January conditions capable of disrupting a well-planned day, real backup options worth having regardless of forecast. The record: 8.6C days feeling like 4C, 5C nights, an extraordinarily high 117.9mm across nearly 18 days and 82 percent humidity.
ClifdenJanuaryRegular · January · 1 month ago · Read more on Tripadvisor ↗
Clifden-forum threads on visiting Connemara call June a genuinely strong month for daylight, posters describing real light lasting until nearly nine in the evening for extended exploring. Regulars call the weather here fundamentally unpredictable regardless of season, a light waterproof jacket and sensible shoes standing advice on any given day. Posters describe July as typically the wetter of the two peak summer months, June comparatively the safer bet though far from guaranteed. Regulars recommend basing in Clifden itself for exploring the wider Connemara region, the town a genuinely convenient hub for the Sky Road and nearby beaches. Posters call the Sky Road loop worth doing even under a grey sky, the coastal views holding up regardless of weather. Regulars recommend real flexibility in any day's plan, a forecast here rarely holding for the full day. The record: 16.1C days feeling like 14C, 11.5C nights, an extraordinarily high 89.6mm across over 16 days and 81 percent humidity.
ClifdenJuneRegular · June · 1 month ago · Read more on Tripadvisor ↗
Clifden-forum threads on hiking trails around Connemara are direct weather is a genuinely major factor in planning any outing, posters consistent that conditions can shift from clear to a real downpour within the same walk. Regulars recommend sticking to established, well-marked trails given how quickly conditions can turn, proper waterproof layers non-negotiable regardless of forecast. Posters call nearby Inishbofin genuinely worth the ferry crossing, though flag it as an island with few indoor fallback options, meaning reasonable conditions really matter for that day trip. Regulars describe a full week as easily filled around Clifden without covering all of Connemara, the coastline and Sky Road drive both rewarding on a cloudy day. Posters recommend a specialist local forecast rather than a generic app given how localized conditions run here. The record: 15.9C days feeling like 13C, 11.8C nights, an extraordinarily high 113mm across nearly 18 days and 82 percent humidity.
ClifdenSeptemberRegular · September · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Clifden's card on the map.

Clifden climate normals — August

Daytime high17°C / 63°F🙂 cool
Nighttime low13°C / 56°F
Feels like (high)15°C / 59°F
Sea temperature17°C / 62°F🧊 bracing
Rainfall126 mm / 5 in🌧 rainy
Rainy days20 days
Humidity83%💦 very humid
Dew point13°C / 55°F
Sunshine9.4 h/day
Daylight14.7 h
Wind27 km/h / 17 mph
Air quality (US AQI)45🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Clifden in August

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

Peak crowdsConnemara Pony Show, Summer holidays in Ireland, school holidays in 7 of the markets that fill it(estimated)

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Peak crowdsBusyShoulder seasonQuiet

Best months for Clifden's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Fair weatherClifden's weather peaks May–July.

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Best weatherFair weatherToughest weather

What's on in Clifden in August

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Season

    Connemara walking season

    15 Apr – 10 Oct · usuallyTrail season

    Diamond Hill in the national park, the Sky Road and the Twelve Bens are at their most reliable from mid-spring to early autumn. Outside that the bog paths hold water and the light runs out mid-afternoon. Source ↗

  • Season

    Midge season

    25 May – 15 Sep · usuallyInsects & disease

    Still evenings near bog and water are the problem, not the days. Anything with an Atlantic breeze on it stays clear, which is most of the coast road and none of the inland lakes. Source ↗

  • Festival

    Connemara Pony Show

    15–24 Aug · usuallyMajor festivalCrowdedBook early

    The world's main gathering of Connemara ponies takes over the showgrounds and the town for the best part of a week each August. Every bed in Clifden is gone months ahead of it. Source ↗

What's on around the world in August →

Nearby, and something's on

Within 300 km of Clifden — a day trip or a short hop — with something on this month. Never part of the comfort score.

Where is Clifden?

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Clifden in August — FAQ

Is August a good time to visit Clifden?
August in Clifden: cool, rainy, with clean air — fine if you can take 20 rainy days. It ranks #5 of 12 months for Clifden on SeasonMap's comfort score (79/100).
What is the weather like in Clifden in August?
In August, Clifden averages a daily high of 17.3°C and a low of 13.4°C, with about 125.9 mm of rain over roughly 20.3 rainy days.
What is the air quality in Clifden in August?
Clifden has a mean US Air Quality Index of about 45 in August.

Within 300 km: Dingle's Blasket Islands boats around 1 Apr – 30 Sep, and Belfast's Belfast Mela on 22–30 Aug.