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Zanzibar ratings
Quality on a good day: 3.0
Consistency of Surf: 1.0
Difficulty Level: 3.0
Crowds: 4.0

Overall: 3.2

See all 18 ratings

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Surf Report Feed

Zanzibar Swell Statistics, December: Surf with Light or Offshore Winds

This image shows only the swells directed at Zanzibar that coincided with light winds or offshore conditions through a typical December and is based upon 2457 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 show increasing swell sizes and largest swells greater than >3m (>10ft) are shown in red. In both graphs, the area of any colour is proportional to how often that size swell was forecast.

The diagram indicates that the dominant swell direction, shown by the biggest spokes, was N, 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 1.3% of the time, equivalent to 0 days. Open sea swells exceeding >3m (>10ft) are unlikely to occur in a normal December. Taking into account the fraction of these swells that coincided with expected offshore winds, and given the fact that Zanzibar is quite sheltered from open water swells, we think that that clean surf can be found at Zanzibar about 1.3% of the time and that surf is blown out by onshore wind -0% of the time. This is means that we expect 0 days with waves in a typical December, of which 0 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.