Peru Swell Patterns
There is a winter and summer swell pattern, most notable in the north of the country, but the staple diet is a reliable, almost constant supply of S to SW swells arriving from the Roaring Forties latitudes between New Zealand and the tip of Chile at Cape Horn. This swell train runs on tracks serviced by the mighty Humboldt Current and the deep corridor of the Peru-Chile Trench, drawing in the energy to the coast with a dominant southerly theme. Size ranges from 2-15ft (0.6-5m) on the swell models, but certain breaks will have double that in wave face height. From April to September, there are a high percentage of days over 6ft (2m), plus the wave period tends toward the teens, with occasional forays up to the 20sec mark. The much rarer summer NW swells that herald from the Aleutian lows, way up north in the Pacific, are also super-long period, since there is a lot of decay on the 5-7 day journey and long lulls are part of the deal. Only the real heart of the season from Nov-Feb will have any consistency on the NW-facing Piura coastline, with up to 8ft (2.5m) swell height, but remember the NW days will be outnumbered by the S-SW swell days by 5 to 1. NW swells will struggle to make it further down the coast to the capital and beyond, but when they do, a few choice rights will be on offer for the regular footers at beaches and reefs that usually don't warrant a check.
The winds for the bulk of the coast are also predominantly from the south for around 50% of the time, showing a habit of being SE in the morning (20%), before swinging SW in the afternoon (20%). This leaves very little option for any other wind directions besides glassy conditions and wind strength remains moderate (10-20mph/16-32kmh), year-round. Right up north in Piura and Tumbes, there is less wind speed, especially in summer, along with more W in the winds, but the coastal angle offsets this.
© ~Low Pressure~