St Agnes Surf Forecast and Surf Report

Alright, grab your wettie, let’s see what St Agnes has got for us over the next couple of weeks. It’s a bit of a mixed bag, to be honest. The start of this run, right through Friday, is straight-up messy. We’ve got a solid looking 8ft of west swell pushing in, but that WNW wind is howling at 19 mph, making it cross-onshore and lumpy. It’s just not worth paddling out into that. The energy is moderate, at 766, but it’s all over the shop. Save your energy.

Saturday starts to show a bit of life, though. The swell drops to a more manageable 5ft, still from the WNW, and the wind goes light. It’s still a bit cross-on in the morning, but by Saturday afternoon, the wind swings to the SW at a gentle 9 mph, turning it cross-offshore. The wave comment says “expect good surf conditions,” and with a 11-second period, it’ll have some push to it. This is the first window where you’re not fighting it. The energy is moderate at 432, but it’s cleaner. This is looking like your first real chance at a wave.

Sunday morning, the wind goes offshore from the SSE, and it’s clean, but the swell has backed off to a weak 3ft with a short, weak 9-second period. The energy is a poor 119. It’s surfable, but super ordinary. Not a standout.

Now here’s where it gets interesting for the long-range. Monday the 7th of September, a proper pulse of swell shows up. We’re talking 8ft of pure west groundswell with a long 13-second period. The energy reads as a strong 1759. This is the biggest, most powerful swell of the window. But—and it’s a big but—the wind is straight out of the WNW at 12 mph, making it cross-on and choppy. It’s a lot of water moving, and it’s messy. It’s a “marginal” call at best. If you’re an experienced surfer who knows the break, it could be on, but it’s not the clean pick.

After that, we drop right back off. Tuesday and Wednesday are back to onshore slop with the swell fading. The energy drops to 700 and then 293, but the wind is still crap. Not worth it.

Thursday the 10th brings another push of 8ft, but it’s from the WSW and short-period (8 seconds), meaning it’s going to be lumpy and closed-out. The energy is moderate at 773, but the wind is cross-shore and picking up. This is not a surf day; 8ft at 8 seconds is a washing machine.

Friday the 11th is a full-on onshore mess, strong NNW wind and a short-period wave. Completely blown out.

Now, here’s the standout that you should circle on your calendar. The weekend of the 12th and 13th of September. Saturday the 12th, the wind drops to a glassy SSE at just 3 mph in the morning, and the swell is a clean 3ft from the west with a 10-second period. The wave comment says “expect good surf conditions.” The energy is moderate at 275. Then Saturday afternoon, it goes cross-offshore at just 6 mph, making it clean with a 4ft west swell. Sunday the 13th is similar—light cross-offshore winds from the ESE and a clean, smaller wave at 2ft. This is your window for the glassy, fun, user-friendly waves without the hassle. It’s not huge, but it’s clean, and it’s the most inviting conditions we see in the whole run.

After that, it goes flat and quiet. The 14th, 15th, and 16th are all small or onshore junk. The energy drops to as low as 31, which is weak as it gets.

We get one more push of swell around Thursday the 17th of September, with 7ft from the WNW at a 10-second period, and a moderate energy of 817. The wind is cross-shore in the morning, but it’s not ideal. Friday the 18th has the same size at 7ft, but the wind is cross-on in the afternoon. The last few days of the window see that swell hanging around at 7ft plus, but the wind is always on it. It’s a lot of water, but it’s never clean.

So, the long and short of it is: the first few days are a write-off. Your best bets are the clean, glassy windows on Saturday the 12th and Sunday the 13th of September. That’s the pick of the bunch for a proper, enjoyable surf. The other big swells on the 7th and 10th are just too messy. It’s about picking your moment here.

The water is running at a touch warmer than normal for this time of year, which is a nice bonus when you do get out.

Stay stoked.

Rusty

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