Weather in Galway in August

Shoulder season. August is shoulder season in Galway — cheaper, quieter, and a genuine gamble. You should expect rain on 20 days of the month, which is more days wet than dry.

August ranks 4 of 12 in Galway: past the worst of the year but short of June, which is the month to book if the dates are open.

Rain on 20 of the month's 31 days, 2 of them heavy. At that frequency a wet-weather backup is not a contingency, it is the itinerary — book the indoor things first and treat the clear days as the bonus. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average August reaches 30 °C. Across the twenty years measured, the hottest August day reached 29.7 °C and the coldest night fell to 6.3 °C, and the wettest single day dropped 30 mm — roughly 29% of the month's rain in one day.

August is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest August on record still delivered 175 mm against 23 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 105 mm average is a reasonable planning figure, not a promise.

Wind is light at 12 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 83%, high enough to notice on the warm days without dominating them.

How August sits in the year

Temperatures hold steady either side: 19.8 °C in July, 19.1 here, 17.3 in September. Nothing about the timing within the month matters much.

Daylight in August

14.9 hours of daylight, losing 1.9 hours across the month. That is between Galway's extremes of 16.9 and 7.6 hours, so days are long enough not to constrain the plan.

An inland climate

Despite being inland, the year stays fairly even: 17.1 °C between the year's warmest afternoons and coldest nights.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead. If the dates are flexible, April is the trade worth considering — 14 points weaker on weather, and materially quieter.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

August in Galway versus nearby

If Galway is one option among several, the nearby comparison is worth making. Cork is close enough to be a coin toss — within a degree on temperature, 2 days less rain. Dublin is close enough to be a coin toss — within a degree on temperature, 3 days less rain.

So: August is effectively as good as it gets here — 4 points behind June, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Galway

See all twelve months in Galway, or where else to go in August.