Viana do Castelo Surf Forecast and Surf Report

Alright, let’s get into it. This is Rusty.

First up, the outlook for the next couple of weeks here is a bit of a mixed bag. There’s a long gap of poor conditions right at the start, so don’t get your hopes up for the next few days. The first real surf on offer doesn’t show until Friday the 28th of August, but that comes with some serious size and caveats. After that, things get cleaner and more promising, with a true standout for the experts showing up in the second week.

We’re looking at a river break here, Viana do Castelo, and it’s exposed to the west swell. The water temp is running unusually cold for this time of year, about 62°, which is about 5° below the norm. That’s a notable chill, so a decent wetsuit is non-negotiable.

The first few days are a washout. Monday the 24th has rain showers, an onshore SW wind at 16 mph, and a messy 7ft SSW swell with a short 8-second period. Combined wave energy is moderate at 654, but the wind and conditions are just poor. Tuesday and Wednesday don’t get any better with onshore and cross-onshore winds, small swell, and more rain. Honestly, not worth paddling out.

Thursday the 27th stays poor with cross-onshore winds and a choppy 5ft to 4ft swell. Nothing to write home about.

Now, here’s where it gets interesting. Friday the 28th of August morning is a real standout. The wind drops to dead glassy, calm conditions, with a clean 7ft WNW groundswell rolling in with a 10-second period. The combined energy is strong at 952. This is the best looking session in the entire forecast. However, the swell is over 5ft and pushing 7ft, so it’s getting into the "too big for beginners" territory. For intermediate and above, with glassy conditions and that WNW direction lining up well with the optimum, this is your window. Keep in mind it’s a river break, so with that period and size, it could be a bit straight, but the clean conditions make it worth a look. Crowds are possible here, so expect company.

The afternoon on Friday gets a bit choppier as a cross-shore breeze picks up, and the conditions go marginal.

Saturday the 29th morning is also glassy but with a much smaller 4ft NW swell at 8 seconds. It’s surfable, but very ordinary. The energy is low at 167. Not a standout, but if you’re desperate for a paddle, it’s clean.

The following week, from Sunday the 30th of August through to Saturday the 5th of September, is largely made up of clean, cross-offshore winds, but with small swell ranging from 3ft to 5ft and periods between 8 and 10 seconds. The energy levels are moderate. A few of these sessions are described as "expect good surf conditions" or "marginal," but nothing really jumps out as epic. The Monday the 31st morning is the pick of this stretch, with a clean 4ft WNW swell at 10 seconds, cross-offshore N winds, and a solid 246 energy reading. It’s consistent and rideable, but not the headline act.

Now, for the true standout of the entire outlook, you have to look ahead to Sunday the 6th of September morning. This is a beauty. Clean, cross-offshore winds with barely a breeze, and a solid 6ft NW groundswell with an 11-second period. The combined energy jumps to 737, which is strong. The conditions are expected to be very good. This is the best option if you’ve got the patience to wait. But then, hold on.

Monday the 7th of September is for the experts only. The morning brings a 5ft W swell with a massive 21-second period – that’s a very long period groundswell. The combined energy is huge: 2639. Conditions are clean with cross-offshore wind. This is excellent for experienced surfers, but for a river break, that super long period can make the waves break a bit too straight. The afternoon is even bigger, with an 8ft W swell at 19 seconds and an energy reading of 5375. It’s too big for this break, so only the most skilled should even consider it.

Tuesday the 8th of September is also too big for the break, with an 12ft WNW swell at 14 seconds and wind and tide favorable, but that’s serious, serious size. Experts only, and with caution.

So to sum it up: sit through the early junk. The real action starts on Friday the 28th of August morning with that glassy, solid 7ft swell. The next big one to circle on your calendar is Sunday the 6th of September morning for clean, strong groundswell. The biggest and most powerful swells hit on the 7th and 8th, but those are only for the brave and the skilled. If you’re a beginner, stay clear of anything over 5ft, and especially stay away from the 7th and 8th.

Rusty.

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