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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

See all 18 ratings

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Surf Report Feed

Utua Mamao (Atafu) Swell Statistics, All Year: 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 year. It is based on 34628 predictions, one every 3 hours. The direction of the spokes show where quality surf generating swell comes from. Five colours represent increasing wave sizes. Very small swells of less than 0.5m (1.5 feet) high are shown in blue. Green and yellow represent increasing swell sizes and red illustrates largest swells greater than >3m (>10ft). In each graph, the area of any colour is proportional to how frequently that size swell occurs.

The diagram suggests that the most common swell direction, shown by the largest 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 1.6% of the time, equivalent to 6 days. Open sea swells exceeding >3m (>10ft) are unlikely to happen in a normal year but 0.5% of the time we expect swell in the range 2-3m (6.5-10ft) 0.5%, equivalent to (2 days). Taking into account the fraction of these swells that coincided with expected offshore winds we estimate that clean surf can be found at Utua Mamao (Atafu) about 1.6% of the time and that surf is messed up by onshore wind 12% of the time. This is means that we expect 51 days with waves in a typical year, of which 6 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.