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Utua Mamao (Atafu) ratings
Quality on a good day: 3.0
Difficulty Level: 1.0
Crowds: 5.0

Overall: 3.5

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Surf Report Feed

Utua Mamao (Atafu) Swell Statistics, August: Surf with Light or Offshore Winds

This image shows only the swells directed at Utua Mamao (Atafu) that coincided with light winds or offshore conditions through a typical August. 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 illustrate increasing wave sizes. Blue shows the smallest swells, less that 0.5m (1.5 feet) high. Green and yellow illustrate increasing swell sizes and red illustrates biggest swells greater than >3m (>10ft). In either graph, the area of any colour is proportional to how commonly that size swell occurs.

The diagram implies that the dominant swell direction, shown by the longest spokes, was SE, whereas the the prevailing wind blows from the E. 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 1.7% of the time, equivalent to 1 days. Open sea swells exceeding >3m (>10ft) are unlikely to happen in a normal August. Taking into account the ratio of these swells that coincided with forecast offshore winds we think that that clean surf can be found at Utua Mamao (Atafu) about 1.7% of the time and that surf is messed up by onshore wind 26% of the time. This is means that we expect 9 days with waves in a typical August, of which 1 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.