Rossnowlagh Water Temperature and Wetsuit Guide
Today's Rossnowlagh sea temperature is 9.6 °C.
Statistics for 30 Apr (1981–2005) – mean: 10.1 °C, range: 9.1 °C to 11.3 °C
The water temperature (9 °C) at Rossnowlagh is very cold. Despite the sun, surfers will need plenty of neoprene. Wear a quality winter wetsuit, a neoprene hood, gloves and boots. A windchill factor of (7 °C).
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 Rossnowlagh. 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.
Rossnowlagh sea temperatures peak in the range 13 to 17°C (55 to 63°F) on around the 16th of August and are at their lowest on about the 2nd of March, in the range 8 to 10°C (46 to 50°F). The warmest sea temperatures at Rossnowlagh in the middle 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 lowest sea temperatures at Rossnowlagh 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 early March.
Actual sea surface water temperatures close to shore at Rossnowlagh 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 Rossnowlagh. Refer to our detailed weather forecasts for this information.