How to Read a Surf Forecast (And Actually Catch More Waves)

Most people paddle out and react.

The best sessions come when you have a plan. When you know your forecast, your lineup markers, your peaks, and the one thing you're working on.

I've surfed El Porto more times than I can remember. Small days, weird days, days where the lineup is moving the whole time and nothing really stands out. And the through line I always come back to is this: the surfers catching waves in those sessions were not the most talented ones. They were the most locked in. They had learned to read the patterns, so they weren't fighting for waves. They were adapting to variables.

You can't predict the ocean. But you can prepare for it.

Here's what to actually look at.

Swell height

Swell height describes the swell, not a guaranteed breaking-wave height at your spot. This is the number everyone looks at and the one that tells you the least on its own.

Swell period

This is the one that matters more than people realize. Period tells you how much power is behind the swell.

As a rough guide, periods around 9 seconds and below often mean shorter, closely spaced wind-swell lines. Period alone doesn't tell you exactly where a swell formed.

Longer periods mean more time between waves. They can bring more powerful surf at the same swell height, but how that energy breaks depends on your spot and its sandbars. Ten seconds isn't a hard dividing line between wind swell and ground swell.

Same wave height, completely different session.

Swell direction

Direction tells you which breaks will turn on. The geography of your local spot can light up on certain swell angles or be completely blocked and flat on others.

In my experience, the 240 to 280 degree window is worth watching at El Porto. Southern swells can be affected by sheltering from Palos Verdes and Catalina, which is one reason a swell that's firing in Orange County may look very different here. Treat that window as a starting point, not a guarantee.

Learn your spot's window. It's the single highest leverage piece of local knowledge you can have.

Multiple swells

Learn how different swells interact. At El Porto, short period wind swell mixing with a long period south swell can create really fun peaky conditions. The two swells stack on each other and you get wedges and peaks that neither one would produce alone.

This is also why the forecast can say two feet and the ocean can hand you something much better than two feet.

Tide

High tide or low tide can completely change your session at the same spot on the same day. At a beach break, tide changes how the sandbar is working, which changes where the wave breaks and how steep it is when it does.

Track it. Write down what the tide was doing when it was good.

Wind

Offshore wind blows from land toward the ocean and can help clean up wave faces. Check the wind direction against the coastline at your exact spot, rather than assuming one compass direction is offshore across the whole South Bay.

One thing I learned the hard way: the day after a big swell often has local wind. A storm pattern moving closer to land creates its own local weather. I once drove to Newport at 4:30am chasing a day-after session and got side onshore mush, then drove two more hours to Malibu to save the day. Check the wind charts before you leave the house.

Your break

Every spot has its own patterns. The forecast gives you numbers. Your break turns those numbers into waves.

Spend time learning the translation and journal it. Screenshot your forecast before a session, then write down how the session actually felt afterward. That's how you build awareness. That's how you build your own local surf IQ.

Pick two peaks before you paddle out

Here's the practical version of all of this.

Before you get in the water, pick a Peak 1 and a Peak 2.

Peak 1 might be your outside spot for the set waves. Most consistent, best wave.

Peak 2 might have fewer of the best waves but lots of pieces of good ones.

Having both keeps you active. It stops you from just sitting there hoping something comes your way, and it gives you somewhere to go when Peak 1 gets crowded.

In 30 minutes you can get a ton of work done if you paddle out with intention.

Your challenge this week

Plan your session before you paddle out. Pick your peaks. Track your forecast. Track your results.

See how much more productive your next 30 minutes in the water can be.

Let's keep building.