uk es it fr pt nl
Utua Mamao (Atafu) ratings
Quality on a good day: 3.0
Difficulty Level: 1.0
Crowds: 5.0

Overall: 3.5

See all 18 ratings

Based on 1 vote. Vote


Surf Report Feed

Utua Mamao (Atafu) Swell Statistics, Autumn: 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 southern hemisphere autumn. It is based on 8052 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 illustrate increasing swell sizes and red illustrates largest swells greater than >3m (>10ft). In both graphs, the area of any colour is proportional to how often that size swell occurs.

The diagram indicates that the prevailing swell direction, shown by the biggest spokes, was SSE, whereas the the most common wind blows from the ENE. 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 2% of the time, equivalent to 2 days. Open sea swells exceeding >3m (>10ft) are unlikely to happen in a normal southern hemisphere autumn. Taking into account the ratio of these swells that coincided with expected offshore winds we estimate that clean surf can be found at Utua Mamao (Atafu) about 2% of the time and that surf is blown out by onshore wind 11% of the time. This is means that we expect 12 days with waves in a typical southern hemisphere autumn, of which 2 days should be clean enough to surf.

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.