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Kahalu'u Beach Park ratings
Quality on a good day: 4.0
Consistency of Surf: 3.5
Difficulty Level: 2.5
Crowds: 4.0
Accommodation: 5.0

Overall: 3.9

See all 18 ratings

Based on 2 votes. Vote


Surf Report Feed

Kahalu'u Beach Park Swell Statistics, October: All Swell – Any Wind

This picture shows the range of swells directed at Kahalu'u Beach Park through a typical October, based on 2480 NWW3 model predictions since 2006 (values every 3 hours). The wave model does not forecast wind and surf right at the coast so we have chosen the most applicable grid node based on what we know about Kahalu'u Beach Park. In the case of Kahalu'u Beach Park, the best grid node is 9 km away (6 miles).

The rose diagram illustrates the distribution of swell sizes and directions, while the graph at the bottom shows the same thing but lacks direction information. Five colours show increasing wave sizes. The smallest swells, less than 0.5m (1.5 feet), high are coloured blue. These occurred only 34% of the time. Green and yellow show increasing swell sizes and red illustrates biggest 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 dominant swell direction, shown by the longest spokes, was SW, whereas the the prevailing wind blows from the NW. Because the wave model grid is out to sea, sometimes a strong offshore wind blows largest waves away from Kahalu'u Beach Park and offshore. We lump these in with the no surf category of the bar chart. To keep it simple we don't show these in the rose graph. Because wind determines whether or not waves are clean enough to surf at Kahalu'u Beach Park, you can select a similar diagram that shows only the swells that were expected to coincide with glassy or offshore wind conditions. Over an average October, swells large enough to cause surfable waves at Kahalu'u Beach Park run for about 66% of the time.

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.