Sandy Mouth Surf Forecast and Surf Report

Alright, Rusty here again. Let’s break this down in feet and miles per hour for those who think that way.

Right off the bat, I’ll be straight with you – this outlook is a rough one for Sandy Mouth. We’ve got a long 16-day stretch, but truth be told, there’s hardly anything to get excited about. The first real surf we see is a tiny blip on Friday the 31st of July, and even then, it’s more of a "maybe if you’re desperate" kind of morning.

The overall pattern is dominated by messy, onshore winds and weak, short-period windswell. The water temp is sitting at 63°F, which is a touch warmer than normal for this time of year, so at least you won't be freezing your toes off if you do decide to sit out there.

The first possible paddle is on Friday morning, 31 July. The combined swell energy is weak (58), with a tiny 3ft swell from the WNW, a period of 7 seconds. The wind is glassy from the NNW, so it will look clean. The report says surfable waves but very ordinary conditions. It’s something, but honestly, it’s barely enough to get on a foamie.

From there, we walk into a desert. Saturday the 1st of August through to the following weekend is all poor surf conditions – cross-onshore winds, bumpy water, and tiny waves. The swell stays weak, mostly under 3ft, with combined energy values in the low double or triple digits (like 154 on Saturday afternoon). The winds are howling at 15 to 25 mph, making a mess of any small bump that tries to form.

Looking at Monday the 3rd and Tuesday the 4th of August, we see the swell period bumping up to 10 seconds, which hints at a little more energy, but the wave height is pitiful (2ft to 2ft) and the winds are cross-onshore. Not happening.

Then there’s a real gap of several days from around the 5th of August to the 8th of August where it’s basically flat or close to it. The swell heights drop to 0.6ft to 1ft. You won’t even get a ripple.

Now, there is one notable spike at the very end of the forecast period. On Sunday morning, 9 August, we see a 5ft swell from the WNW with a period of 7 seconds. The combined energy hits 247, which is moderate. The wind is a moderate cross-onshore from the NW at 15 mph, so it will be a bit bumpy. The same goes for Sunday afternoon – 6ft and 295 energy. But here’s the catch: it’s still just a short-period windswell, and with the onshore wind, it’s going to be lumpy and messy. This setup at a beach like Sandy Mouth, with those junky winds, looks far more interesting for a kite surfer than a paddle surfer.

So, what’s the best on offer in this whole 16-day window? I’d have to say the Sunday morning, 9 August session. It’s the biggest swell of the whole period, but it’s also deep in the second week, so treat it as promising but less certain. It’s an exposed break, so it will get the size, but the short period (7 seconds) and the cross-onshore wind mean it’s not going to be a gem.

Honestly, for any beginner, anything over 5ft starts to get heavy, and this 5ft to 6ft is right on that edge – with the onshore chop, it won’t be friendly.

To sum it up: we’ve got a long dry spell. A tiny clean morning on the 31st is your only real chance for a clean wave, but it’s tiny. The only other pulse of size comes in the second week, but it’s wind-affected and rough. If you’re desperate, bring a kite.

Rusty.

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