Lower Trestles Surf Season
California, USA · part of the Lower Trestles spot guide
Lowers is a genuine two-season wave. Its prime runs roughly April through October on Southern Hemisphere and SoCal-summer south swell — the WSL Finals window is deliberately set in September to catch late-summer energy — but it works year-round because winter west-to-northwest swell arrives more directly on the southwest-facing break. October is a statistical sweet spot, catching tail-end south, early northwest and autumn Santa Ana offshores at once.
It runs on three engines: distant Southern Ocean storms near New Zealand and off Antarctica for long-period south groundswell; eastern Pacific hurricanes off Baja and Mexico from July through October for shorter-fuse, angle-sensitive south-southeast pulses; and the North Pacific for the winter west-to-northwest backbone.
Where the swell comes from
The money-maker is long-period south to south-southwest groundswell from the Southern Ocean, refracting cleanly into the peak from April through October. Tropical systems off Mexico add power in late summer but are angle-sensitive, and North Pacific west-to-northwest swell keeps it alive all winter.
Historic swells at Lower Trestles
Hurricane Marie
A Category-5 eastern Pacific hurricane delivered one of SoCal’s biggest hurricane-surf events in decades; south-facing shores saw faces to around 20 ft, and Trestles was a prime standout on the long-period south pulse.
Hurricane Hilary
A very extreme southeast swell angle made it feast-or-famine — much of San Diego was shadowed while North Orange County saw head-high to double-overhead standouts, a textbook lesson in Lowers’ angle sensitivity.
The first WSL Finals
The inaugural world-title decider ran in a pumping 6-to-8-foot south swell, crowning Carissa Moore and Gabriel Medina — the clean, head-high, long-period south that shows Lowers at its ideal.
Finals day, classic Lowers
Filipe Toledo took his first title and Stephanie Gilmore a record eighth in classic late-summer south — the contest-documented state the wave is famous for.