Waterville Weather in August
With daytime temperatures of 18°C (64°F) and nighttime lows of 13°C (55°F), August in Waterville brings pleasant temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 115 mm (4.5 in) falls on average.
Rainfall in Waterville in August
The climate data from previous years indicates about 21 days of rain, averaging 115 mm (4.5 in) for the month. This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.
Temperature in Waterville in August
Daytime temperatures in Waterville reach 18°C (64°F) in August, dropping to 13°C (55°F) at night. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. At 13°C (55°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping. On average, it has the peak temperatures of the year.
Sunshine in Waterville in August
The area experiences a moderate amount of sunshine, with approximately 139 hours of sunlight expected. This means a decent mix of sun and overcast.
Wind Speed in Waterville in August
August sees wind speeds averaging 4 m/s (8 knots). You'll experience variable conditions with moderate winds that create small waves on water and keep branches moving. Conditions range from light winds to moderate breezes throughout the month.
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 your ideal day consists of dry skies and pleasant temperatures, May, June, July and August typically offer the best circumstances for Waterville.
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 Waterville's climate page.
Waterville Temperature in August
Min Temperature
13°C (55°F)
Max Temperature
18°C (64°F)
Water Temperature
15°C (59°F) *
Chance of Rain
68%
Precipitation
115 mm (4.5 in)
Rainy days
21 days
Humidity
78% *
Windspeed
4 m/s (8 knots) *
Sunshine
139 hours *
Percentage Sunshine
33% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Waterville typically stay consistent throughout August, with daily highs averaging around 18°C (64°F). Nights are cool, with lows around 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 Waterville in August
Browse day-by-day weather records for Waterville spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Waterville historical weather extremes in August
Our historical data for Waterville spans 1976 to 2025, revealing these weather extremes.
- On August 17, 1995, temperatures climbed to 28°C (82°F), marking the warmest August day on record.
- The lowest daytime temperature in August was 13°C (55°F), recorded on August 28, 1986.
- The lowest overnight temperature recorded in August was 4°C (39°F) (August 31, 1986).
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
pleasant
tolerable
unpleasant
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What to Wear in Waterville in August
Comfortable temperatures call for an easy wardrobe in August. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. The water temperature sits at about 15°C (59°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Waterville 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 Waterville's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Waterville climate overview or explore weather in Ireland.
