Today's Portstewart Strand sea temperature is 12.6 °C
(Slightly warmer than usual)
| Mean: | 11.7 °C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Range: | 10.8 °C to 13.0 °C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statistics for 09 Jun (1981–2005) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Today, many surfers would wear a winter wetsuit, a neoprene hood, gloves and boots.
The water temperature (12 °C) at Portstewart Strand is fairly cold. Surfers will need a quality steamer wetsuit, a neoprene hood, gloves and boots because it will be cloudy with an effective air temperature of (9 °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 Portstewart Strand. 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.
Portstewart Strand water temperatures peak in the range 13 to 16°C (55 to 61°F) on around the 13th of August and are at their coldest on about the 25th of February, in the range 7 to 9°C (45 to 48°F). The highest water temperatures at Portstewart Strand in the third 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 water temperatures at Portstewart Strand 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 late February.
Actual sea surface water temperatures close to shore at Portstewart Strand 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 Portstewart Strand. Refer to our detailed weather forecasts for this information.
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