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Hells Mouth (Porth Neigwl) water temperature
Hells Mouth (Porth Neigwl) ratings
Quality on a good day: 4.2
Consistency of Surf: 3.8
Difficulty Level: 1.8
Wind and Kite Surfing: 4.0
Crowds: 2.8

Overall: 3.6

See all 18 ratings

Based on 6 votes. Vote


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Hells Mouth (Porth Neigwl) Water Temperature and Wetsuit Guide

(Lleyn Peninsula, UK)

Today's Hells Mouth (Porth Neigwl) sea temperature is 9.7 °C.

Statistics for 21 Apr (1981–2005) – mean: 9.0 °C, range: 7.3 °C to 9.8 °C

The water temperature (9 °C) at Hells Mouth (Porth Neigwl) is very cold. Despite the sun, surfers will need to wear a good steamer wetsuit, a neoprene hood, gloves and boots. Relatively mild air temperatures and a windchill factor of (13 °C).

United Kingdom Sea Water Temperature

Map of current United Kingdom
Surface Water Temperatures
based on measurements from oceanographic satellites
United Kingdom Water Temperature Anomaly

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 Hells Mouth (Porth Neigwl). 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.

Hells Mouth (Porth Neigwl) Water Temperature Graph

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.

Hells Mouth (Porth Neigwl) sea temperatures peak in the range 14 to 18°C (57 to 64°F) on around the 12th of August and are at their lowest on about the 28th of February, in the range 5 to 9°C (41 to 48°F). The highest seasonal sea temperatures at Hells Mouth (Porth Neigwl) in the second week of August lend themselves to a 4/3mm wetsuit or a 3/2mm suit and 3mm neoprene boots. The lowest sea temperatures at Hells Mouth (Porth Neigwl) 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 Hells Mouth (Porth Neigwl) 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 Hells Mouth (Porth Neigwl). Refer to our detailed weather forecasts for this information.