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Sea temperatures, water sports and vacation activities near Castleknock, Ireland

Water temperatures throughout the year and general information about Castleknock...

Castleknock is a coastal city in Ireland. It is a quite little city close to the water with a population of 8301 people. The water temperature around Castleknock has moderate variability year round. The temperature ranges from 6.9°C (44.5°F) in March up to 14.3°C (57.8°F) in the month of August, as illustrated below. The average water temperature throughout the year is 11°C (51°F) and the best time for water activities is late summer, since Castleknock is located in the northern hemisphere.

Hover over the bars to see temperature for each month in Celsius and Fahrenheit.

What is the current water temperature near Castleknock?

The current water temperature in the month of July near Castleknock is about:
13°C (56°F)

Are there surf spots near Castleknock?

There are not too many surf spots close to Castleknock. A spot, which is not too far away, is Clogherhead, which is about 33.8km (52.2miles) away from Castleknock. Click here for directions and for more information on Clogherhead and its water temperature. Other surfspots near Castleknock are Hells Mouth, which is approximately 84.1km (52.2miles) away, and Tramore, located ca 90.3km (56.1miles) from Castleknock.

Are there beaches close by?

Yes, there are some gorgeous beaches in proximity to Castleknock. The closest one is Sandymount Strand, which is only 7.4km (4.6miles) away from Castleknock. Another beach near Castleknock is Merrion Strand, which is 7.4km (4.6miles) away.

Which wetsuit thickness is recommended for Castleknock?

The water temperature around Castleknock is pretty cold, reaching up to 14°C (58°F) in the months of July, August, and September. During this time, in the late summer, a 3-4mm wetsuit is recommended to be able to stay in the water for more than half an hour, but some might even be ok with a good 2/3mm suit for surfing, swimming, snorkelling, or scuba diving around Castleknock. However, during February, March, and April, temperatures reach lows of nearly 7°C (44°F). During these months, a 4-5mm wetsuit is required to feel not too cold, but some might even be ok with a very high-quality 4/3mm suit for short amounts of time . For very chilly conditions and cold mornings/evenings, it might be recommended to carry a pair of boots, a hoodie and a gloves.

How is the scuba diving and fishing close to Castleknock?

Due to comparatively large temperature changes during the year, scuba diving and fishing conditions vary a lot depending on the time of the year. The temperature ranges from 7 to 12°C (44-53°F) during spring. Haddock, Pollock, and Atlantic Cod can usually be found in waters of this temperature range. Nevertheless, the conditions typically change during July, August, and September when temperatures range from 9 to 14°C (49-58°F). Fish that like to swim in waters of this temperature range include: Atlantic Mackerel, Winter Flounder, and Tautog.

Directions to Castleknock: How do I get there?

Please follow the directions in the map below.

Some fun facts about Castleknock...

Do you know what the the city Windeby in Germany, the city Sasel in Germany, and the island Ronde in Grenada have in common with Castleknock? Click on the links to find out...