Portmarnock Weather in October

Portmarnock in October averages 15°C (59°F) during the day and 9°C (48°F) at night. Keep in mind that quite a bit of rainfall is expected this month.

Rainfall in Portmarnock in October

Typically around 17 days of rainfall are expected, averaging 87 mm (3.4 in) for the month. Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.

Temperature in Portmarnock in October

Daytime highs in Portmarnock in October reach 15°C (59°F), with nights around 9°C (48°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 9°C (48°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in Portmarnock in October

With limited sunshine this month, there are about 97 hours of sun. It's ideal for those who prefer a cooler, cloudier climate.

Wind Speed in Portmarnock in October

October has wind speeds averaging 5 m/s (10 knots). You can expect gentle to moderate winds that move small trees and make flags wave steadily on typical days. Conditions typically range from light breezes to moderate winds.

Average water temperature in October

With water at 14°C (57°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 prefer dry days with pleasant temperatures, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.