uk es it fr pt nl
Benllech Bay ratings
Quality on a good day: 1.0
Consistency of Surf: 1.5
Difficulty Level: 1.0
Wind and Kite Surfing: 3.0
Crowds: 1.0

Overall: 2.7

See all 18 ratings

Based on 2 votes. Vote


Surf Report Feed

Benllech Bay Swell Statistics, December: All Swell – Any Wind

The rose diagram shows the range of swells directed at Benllech Bay through a typical December and is based upon 2455 NWW3 model predictions since 2008 (values every 3 hours). The wave model does not forecast wind or surf right at the coastline so we have chosen the best grid node based on what we know about Benllech Bay, and at Benllech Bay the best grid node is 25 km away (16 miles).

The rose diagram describes the distribution of swell directions and swell sizes, while the graph at the bottom shows the same thing but lacks direction information. Five colours represent increasing wave sizes. Very small swells of less than 0.5m (1.5 feet) high are shown in blue. These happened only 72% of the time. Green and yellow represent 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 occurs.

The diagram suggests that the dominant swell direction, shown by the largest spokes, was NW, whereas the the prevailing wind blows from the WSW. Because the wave model grid is away from the coast, sometimes a strong offshore wind blows largest waves away from Benllech Bay and out to sea. We group these with the no surf category of the bar chart. To simplify things we don't show these in the rose diagram. Because wind determines whether or not waves are surfable at Benllech Bay, you can load a different image that shows only the swells that were predicted to coincide with glassy or offshore wind conditions. Over an average December, swells large enough to cause good for surfing waves at Benllech Bay run for about 14% 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.