Portmarnock Weather in August

August in Portmarnock typically sees daytime highs of 19°C (66°F) and nighttime lows of 13°C (55°F). Rainfall is also possible this month, so it's worth packing an umbrella. It falls within the summer season.

Rainfall in Portmarnock in August

Typically, about 16 days will experience rainfall, with an average of 82 mm (3.2 in) for the month. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in Portmarnock in August

If you're visiting Portmarnock in August, expect highs of 19°C (66°F) and overnight lows around 13°C (55°F). This month falls in the summer season. Even when the weather is stable, mornings and evenings can still feel distinctly cool. 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 Portmarnock 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 Portmarnock 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.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. July and August typically offer the best weather for Portmarnock.