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Ampang ratings
Quality on a good day: 3.0
Consistency of Surf: 2.0
Difficulty Level: 3.0
Crowds: 2.0

Overall: 3.2

See all 18 ratings

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Surf Report Feed

Ampang Swell Statistics, April: Surf with Light or Offshore Winds

This image shows only the swells directed at Ampang that coincided with light winds or offshore conditions through a typical April. It is based on 2640 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 represent increasing swell sizes and red represents largest swells greater than >3m (>10ft). In both graphs, the area of any colour is proportional to how frequently that size swell happens.

The diagram suggests that the most common swell direction, shown by the biggest spokes, was SSW, whereas the the most common wind blows from the ESE. 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 23% of the time, equivalent to 7 days. Open sea swells exceeding >3m (>10ft) are unlikely to arise in a normal April but 19% of the time you can expect swell in the range 1.3-2m (4-6.5ft) 19%, equivalent to (6 days). Taking into account the ratio of these swells that coincided with predicted offshore winds, and given the fact that Ampang is slightly protected from open water swells, we calculate that clean surf can be found at Ampang about 23% of the time and that surf is blown out by onshore wind 37% of the time. This is means that we expect 18 days with waves in a typical April, of which 7 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.