uk es it fr pt nl
Viana do Castelo ratings
Quality on a good day: 2.7
Consistency of Surf: 2.3
Difficulty Level: 1.3
Wind and Kite Surfing: 4.0
Crowds: 1.3

Overall: 3.3

See all 18 ratings

Based on 4 votes. Vote


Surf Report Feed

Viana do Castelo Swell Statistics, July: Surf with Light or Offshore Winds

This image shows only the swells directed at Viana do Castelo that coincided with light winds or offshore conditions over a normal July. It is based on 2976 predictions, one every 3 hours. The direction of the spokes show where quality surf generating swell comes from. Five colours show increasing wave sizes. The smallest swells, less than 0.5m (1.5 feet), high are coloured blue. Green and yellow represent increasing swell sizes and red illustrates largest swells greater than >3m (>10ft). In both graphs, the area of any colour is proportional to how commonly that size swell happens.

The diagram implies that the dominant swell direction, shown by the longest spokes, was WNW, whereas the the most common wind blows from the NW. The chart at the bottom shows the same thing but without direction information. For example, swells larger than 1.5 feet (0.5m) coincided with good wind conditions 42% of the time, equivalent to 13 days. Open sea swells exceeding >3m (>10ft) are unlikely to arise in a normal July but 19% of the time you can expect swell in the range 1.3-2m (4-6.5ft) 19%, equivalent to (6 days). Taking into account the proportion of these swells that coincided with forecast offshore winds, and given the fact that Viana do Castelo is exposed to open water swells, we estimate that clean surf can be found at Viana do Castelo about 42% of the time and that surf is messed up by onshore wind 53% of the time. This is means that we expect 29 days with waves in a typical July, of which 13 days should be surfable.

IMPORTANT: Beta version feature! Swell heights are open water values from NWW3. There is no attempt to model near-shore effects. Coastal wave heights will generally be less, especially if the break does not have unobstructed exposure to the open ocean.