Ballycastle Water Temperature and Wetsuit Guide

Very cold water temperature (7 °C / 46 °F) at Ballycastle. Despite the sunshine, even with a thick winter wetsuit, neoprene hood, gloves and boots it will be difficult to stay comfortable in the sea for long today.

Map of current Ireland Surface Water Temperatures based on measurements from oceanographic satellites

Map of current Ireland Sea Water Temperature Anomalies (compared with long term averages at this time of year)

(click thumbnails to expand)

Below is a graph of Historical Sea Surface Temperature for Ballycastle. This has been derived from analysis of two decades of oceanographic satellite measurements of nearby open water. We have calculated the average water temperature variation around the year as well as the extremes that have been observed on each date.

All of the graphs for the surf breaks presented on Surf-Forecast.com are on the same scale to enable comparison between locations around the world.

Ballycastle sea water temperatures peak in the range 13 to 16°C (55 to 61°F) on around the 12th of August and are at their coldest on about the 28th of February, in the range 6 to 9°C (43 to 48°F). The warmest sea water temperatures at Ballycastle in the second week of August are ideally suited to a 4/3mm wetsuit + 3mm boots, although a 5/3mm wetsuit may be preferable for longer sessions and cold windy days. The coldest sea water temperatures at Ballycastle mean that you will need a flexible 6/5/4mm wetsuit or a well fitting 5/4mm wetsuit with gloves and 5mm neoprene booties and a hood to surf here in the fourth week of February.

Actual sea surface water temperatures close to shore at Ballycastle can vary by several degrees compared with these open water averages. This is especially true after heavy rain, close to river mouths or after long periods of strong offshore winds. Offshore winds cause colder deep water to replace surface water that has been warmed by the sun. Air temperature, wind-chill and sunshine should also be considered before deciding on the kind of wetsuit needed to stay warm when surfing at Ballycastle. Refer to our detailed weather forecasts for this information.

Latest surface water temperature for the entire globe. Click the image to view a larger version.