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Downhill water temperature
Downhill ratings
Quality on a good day: 2.0
Consistency of Surf: 3.0

Overall: 3.3

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Downhill Water Temperature and Wetsuit Guide

(Londonderry, Ireland)

Today's Downhill sea temperature is 10.0 °C.

Statistics for 25 May (1981–2005) – mean: 10.9 °C, range: 9.2 °C to 12.3 °C

The water temperature (10 °C) at Downhill is quite cold. If the sun shines as forecast, it should feel warm enough to get away with a good sealed spring wetsuit but you won't overheat in a winter wetsuit, gloves boots and a hood. Effective windchill factor of (12 °C).

Ireland Sea Water Temperature

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

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 Downhill. 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.

Downhill 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.

Downhill water temperatures peak in the range 13 to 16°C (55 to 61°F) on around the 13th of August and are at their lowest on about the 25th of February, in the range 7 to 9°C (45 to 48°F). The warmest water temperatures at Downhill 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 lowest water temperatures at Downhill 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 Downhill 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 Downhill. Refer to our detailed weather forecasts for this information.