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Bhalash CC BY-SA 4.0 Wikimedia Commons

Lough Mask

Lake

On the Mayo-Galway border, Lough Mask draws anglers for trout and salmon fishing, offers boat trips to island ruins and crannogs, and sits amid low drumlin hills frequented by wild swimmers.

Lough Mask LimerickGalwayWestport, County MayoEnnisShannon, County ClareKing John's Castle (Limerick)ConnemaraAchill IslandLough Mask

Lough Mask essentials

Address: Lough Mask, County Mayo / County Galway border, Connacht, Ireland
Hours: Open access (no set hours)
Admission: Free (open lake); fishing and some activities require permits from local angling clubs

About Lough Mask

Lough Mask is a large freshwater lake in the west of Ireland, straddling counties Mayo and Galway, known for its fisheries and clear, limestone-influenced waters.

Lough Mask has long been integrated into local rural life, supporting fishing, small-scale transport and local agriculture; human settlement and activity around the lake date back many centuries.

The lake lies inland in the west of Ireland, spanning parts of County Mayo and County Galway, set within a rural landscape of lakeshore villages, drumlins and farmland.

  • Fishing: Renowned among anglers for trout and pike, the lake supports a long-established recreational fishery with boat and shore fishing widely practised.
When to Go

Best Time to Visit Lough Mask

Visit from late spring to summer for the best boating and angling conditions and the warmest weather.

Late spring and summer
May-Sep · 12-22°C
Warmest and best time for boating and trout fishing; water activities and angling are at their peak.
Autumn
Sep-Nov · 6-15°C
Cooler and quieter with good colours; fishing remains possible but conditions are more changeable.
Winter
Dec-Feb · 0-10°C
Colder and wetter; fewer recreational services and less comfortable for boating.

Weather & Climate near Lough Mask

Climate

Lough Mask's climate is classified as Oceanic - Oceanic climate with mild summers (peaking in August) and cold winters (coldest in February). Temperatures range from 3°C to 18°C. Abundant rainfall (1128 mm/year), wettest in November.

Air Quality: AQI 26 Good
Best Time to Visit
JuneJulyAugust
Temperature & Rainfall
Temperature Range
29°
Warmest Month
-7°
Coldest Month
Monthly Conditions
Month Comfort Temp Feels Rain Sky Humidity Wind UV Daylight
January Poor 3° - 8° 3° 122 mm overcast 92% 4.7 m/s 0.0 low 7.9h
February Poor 3° - 8° 2° 82 mm overcast 92% 4.7 m/s 0.1 low 9.6h
March Acceptable 4° - 9° 4° 91 mm overcast 89% 4.7 m/s 0.4 low 11.7h
April Acceptable 5° - 11° 6° 61 mm overcast 85% 4.0 m/s 0.8 moderate 13.8h
May Acceptable 7° - 14° 11° 71 mm overcast 82% 4.0 m/s 1.2 high 15.7h
June Good 10° - 16° 13° 66 mm overcast 82% 3.8 m/s 1.4 high 16.7h
July Good 12° - 18° 15° 68 mm overcast 84% 3.7 m/s 1.2 high 16.2h
August Good 12° - 18° 15° 91 mm overcast 85% 3.6 m/s 1.0 moderate 14.6h
September Good 10° - 16° 13° 101 mm overcast 87% 3.9 m/s 0.7 moderate 12.5h
October Acceptable 8° - 13° 11° 124 mm overcast 90% 4.2 m/s 0.3 low 10.4h
November Poor 6° - 11° 6° 127 mm overcast 92% 4.1 m/s 0.1 low 8.4h
December Acceptable 5° - 9° 4° 124 mm overcast 93% 4.4 m/s 0.0 low 7.3h
Getting There & Around

How to Get to Lough Mask

Lough Mask is in the west of Ireland between County Mayo and County Galway. The lake is reachable by car via the N84 to Ballinrobe and then by regional roads (for example the R300/R345 corridors) to various access points; Ballinrobe and the village of Cong are common bases for visiting the lake.

Public bus services to the immediate shoreline are limited, so private car or local taxi transfers from Ballinrobe or Galway are the most practical options-Galway city is approximately a 40-60 minute drive depending on route and traffic.

Tips for Visiting Lough Mask

  • If you plan to fish, secure a local angling permit in advance from nearby towns and ask local shops about current boating and angling rules; Lough Mask is renowned for trout and pike.
  • Use established public slipways and local boat‑hire operators rather than informal launch points, and choose calm weather and early-morning outings for the best water conditions and visibility.