Mawgan Porth Surf Forecast and Surf Report

Alright, let’s break it down for Mawgan Porth. It’s a river mouth spot, open to west-northwest swells, and it’s fairly consistent, so we usually get a bit of action. The water temperature is about normal for the season.

The first week is a bit of a bust. The 2nd, 3rd, and 4th of September are all onshore or cross-onshore, with swell heights from 3 ft to 7 ft, but the wind is trashing it. The wave energy is moderate to strong (values between 108 and 562), but it’s all lumpy and choppy. Not worth getting wet.

The 5th looks a little more promising. A light north wind at 3 mph, with a 4 ft swell from the WNW and a 10-second period. The energy is moderate (356), but it’s a cross-shore, so the surface is just okay. It’s marginal. The afternoon drops off.

Sunday the 6th is tiny, with 2 ft and 2 ft swells, clean but weak (energy down to 85 and 58). Not worth the effort.

Then we get a big energy spike on the 7th and 8th. The 7th morning has a 5 ft swell with a very long 13-second period, and energy at a strong 899. The 7th afternoon hits 7 ft with a 12-second period and a massive 1113 energy reading. But the wind is cross-on or onshore, so it’s a blown-out mess. That’s a real bummer, because that’s proper groundswell power. The 8th is similar, with moderate energy (524, 325) but still onshore.

The rest of the week into the 10th is a mix of onshore wind and moderate swell, all poor. The 11th and 12th drop right off, with tiny 2 ft to 2 ft swells and very low energy, down to 46 on the 12th afternoon. A real flat spell.

Here’s the standout. Sunday, 13th September morning – that’s the one. The wind swings to a light 6 mph north-northeasterly, giving us a clean, cross-offshore breeze. The swell is 5 ft from the west, with an 8-second period. The energy is moderate (273), and the conditions are clean. That’s the best of the whole run. It’s a good size for most, and the wind will keep it tidy. Crowds can be a thing here, so expect a few people out.

Then we go quiet again. The 14th and 15th are tiny, with swells under 2 ft and energy barely registering – 85 and 27. The 16th morning is glassy, with a 2 ft, 10-second period swell, but it’s very small (energy 82). The 16th afternoon has a 4 ft, 12-second long-period swell, but it’s cross-shore, so it’s a marginal call.

The final highlight is Thursday, 17th September morning. A clean, cross-offshore wind from the northeast at 6 mph, with a 5 ft swell from the west, 10-second period, and moderate energy (541). That’s another decent session, but it’s a long way out, so keep an eye on it.

So, overall, a rough first week, a flat spell mid-month, and then two clean windows around the 13th and 17th. The 13th is the real pick of the bunch.

Rusty.

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