Today's Johnshaven sea temperature is 14.2 °C
(Normal for this time of year (within 0.2° of average))
| Mean: | 14.0 °C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Range: | 12.5 °C to 15.5 °C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statistics for 05 Aug (1981–2005) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Today, many surfers would wear a spring wetsuit.
The water temperature (14 °C) at Johnshaven is quite cool. If the sun shines as we have forecast, it should feel warm enough to surf in a good spring wetsuit. Effective windchill factor of (16 °C) will make the air and water feel about the same temperature.
 Map of current United Kingdom Surface Water Temperatures (based on measurements from oceanographic satellites) |  Map of current United Kingdom 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 Johnshaven. 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.
Johnshaven sea temperatures peak in the range 12 to 16°C (54 to 61°F) on around the 10th of August and are at their lowest on about the 23rd of February, in the range 5 to 8°C (41 to 46°F). The maximum sea temperatures at Johnshaven in early to mid 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 Johnshaven 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 Johnshaven 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 Johnshaven. Refer to our detailed weather forecasts for this information.
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