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Nungwi Reefs ratings
Quality on a good day: 2.0
Consistency of Surf: 3.0
Difficulty Level: 1.0
Crowds: 5.0

Overall: 2.6

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Surf Report Feed

Nungwi Reefs Swell Statistics, June: Surf with Light or Offshore Winds

This image shows only the swells directed at Nungwi Reefs that coincided with light winds or offshore conditions through a typical June. It is based on 2306 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 represent increasing swell sizes and red shows highest swells greater than >3m (>10ft). In either graph, 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 largest spokes, was ESE, whereas the the dominant wind blows from the S. 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 75% of the time, equivalent to 22 days. Open sea swells exceeding >3m (>10ft) are unlikely to happen in a normal June but 11% of the time we expect swell in the range 2-3m (6.5-10ft) 11%, equivalent to (3 days). Taking into account the fraction of these swells that coincided with expected offshore winds, and given the fact that Nungwi Reefs is exposed to open water swells, we think that that clean surf can be found at Nungwi Reefs about 75% of the time and that surf is spoilt by onshore wind 15% of the time. This is means that we expect 27 days with waves in a typical June, of which 22 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.