uk es it fr pt nl
Winthrop Jetty ratings
Quality on a good day: 2.3
Consistency of Surf: 2.0
Difficulty Level: 2.8
Wind and Kite Surfing: 1.2
Crowds: 2.4

Overall: 2.0

See all 18 ratings

Based on 25 votes. Vote


Surf Report Feed

Winthrop Jetty Swell Statistics, August: Surf with Light or Offshore Winds

This image shows only the swells directed at Winthrop Jetty that coincided with light winds or offshore conditions through a typical August and is based upon 2975 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 show increasing swell sizes and largest swells greater than >3m (>10ft) are shown in red. In each graph, the area of any colour is proportional to how commonly that size swell happens.

The diagram implies that the dominant swell direction, shown by the biggest spokes, was ESE, whereas the the most common wind blows from the SW. 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 27% of the time, equivalent to 8 days. Open sea swells exceeding >3m (>10ft) are unlikely to arise in a normal August. Taking into account the proportion of these swells that coincided with expected offshore winds, and given the fact that Winthrop Jetty is exposed to open water swells, we calculate that clean surf can be found at Winthrop Jetty about 27% of the time and that surf is blown out by onshore wind 28% of the time. This is means that we expect 17 days with waves in a typical August, of which 8 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.