Dalkey Weather in August
August in Dalkey averages 19°C (66°F) during the day and 13°C (55°F) at night. Quite a bit of rainfall is typical this month, with around 83 mm (3.3 in) on average. An umbrella is a good idea.
Rainfall in Dalkey in August
Historically, approximately 16 days this month are expected to have rain, averaging 83 mm (3.3 in). Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.
Temperature in Dalkey in August
In August, Dalkey gets pleasant temperatures, with highs of 19°C (66°F). Nights cool to around 13°C (55°F). This month falls in the summer season. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 13°C (55°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep. On average, it sees the highest temps of the year.
Sunshine in Dalkey in August
The area enjoys a moderate level of sunlight, with around 157 hours. It's a good balance between sunny and cloudy days.
Wind Speed in Dalkey in August
Wind speeds average 4 m/s (8 knots) during August. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.
Average water temperature in August
With water at 15°C (59°F), it's on the cooler side. Keen swimmers won't be put off, but those who prefer warm water may find it less enjoyable.If you're inclined towards comfortable temperatures and drier conditions, August is a good time to visit Dalkey.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Ireland, check out our Dalkey's climate page.
Dalkey Temperature in August
Min Temperature
13°C (55°F)
Max Temperature
19°C (66°F)
Water Temperature
15°C (59°F) *
Chance of Rain
52%
Precipitation
83 mm (3.3 in)
Rainy days
16 days
Humidity
69% *
Windspeed
4 m/s (8 knots) *
Sunshine
157 hours *
Percentage Sunshine
35% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Dalkey typically stay consistent throughout August, with daily highs averaging around 19°C (66°F). Nights are cool, with lows typically ranging from 10°C (50°F) to 13°C (55°F).
Average temperatures in August
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for Dalkey in August
Browse day-by-day weather records for Dalkey spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Dalkey historical weather extremes in August
Based on weather observations in Dalkey between 1976 and 2025, these are the recorded extremes during August.
- The warmest day in August was on August 2, 1990, with a maximum of 28°C (82°F).
- The lowest daytime temperature in August was 12°C (54°F), recorded on August 26, 1986.
- Dalkey registered its coldest August night on August 31, 2010, with temperatures dropping to 3°C (37°F).
- The wettest day in August Dalkey was on August 2, 2014 with 52 mm (2 in) of precipitation.
Best Places in Ireland in August
Find out more about the weather in Ireland and which places have the best travel conditions in this month. See all of Ireland in August →
perfect weather
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tolerable
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What to Wear in Dalkey in August
For Dalkey in August, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. With water temperatures around 15°C (59°F), the water is quite cold for swimming. You can skip the swimwear unless you're particularly tough. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Dalkey in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Ireland, check out our Dalkey's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Dalkey climate overview or explore weather in Ireland.
