Today's Benllech Bay sea temperature is 13.6 °C
(1.4°C warmer than normal for this time of year)
| Mean: | 12.2 °C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Range: | 11.0 °C to 13.4 °C | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statistics for 09 Jun (1981–2005) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Today, many surfers would wear a spring wetsuit, a neoprene hood and gloves.
The water temperature (13 °C) at Benllech Bay is quite cool. You will need a quality spring wetsuit, and maybe neoprene hood because it will be cloudy with an effective air temperature of just (9 °C). Gloves are a good idea, neoprene boots optional.
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Below is a graph of Historical Sea Surface Temperature for Benllech Bay. 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.
Benllech Bay sea water temperatures peak in the range 14 to 17°C (57 to 63°F) on around the 15th of August and are at their lowest on about the 24th of February, in the range 5 to 9°C (41 to 48°F). The warmest seasonal sea water temperatures at Benllech Bay in mid August lend themselves to a 4/3mm wetsuit or a 3/2mm suit and 3mm neoprene boots. The lowest sea water temperatures at Benllech Bay 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 Benllech Bay 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 Benllech Bay. Refer to our detailed weather forecasts for this information.


