Viana do Castelo Water Temperature and Wetsuit Guide

The water temperature (13 °C / 56 °F) at Viana do Castelo is fairly cool. Despite the sun, a windchill factor of (7 °C / 45 °F) means that surfers will need a good quality spring wetsuit, a neoprene hood. Some surfers would wear gloves and boots.

Map of current Portugal Surface Water Temperatures based on measurements from oceanographic satellites

Map of current Portugal 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 Viana do Castelo. 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.

Viana do Castelo sea temperatures peak in the range 18 to 21°C (64 to 70°F) on around the 14th of August and are at their lowest on about the 29th of February, in the range 13 to 14°C (55 to 57°F). The warmest Viana do Castelo sea temperatures in mid August require something like a 3/2mm fully sealed wetsuit. The lowest sea temperatures at Viana do Castelo in late February 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.

Actual sea surface water temperatures close to shore at Viana do Castelo 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 Viana do Castelo. Refer to our detailed weather forecasts for this information.

Latest surface water temperature for the entire globe. Click the image to view a larger version.