Viana do Castelo Surf Forecast and Surf Report

Alright, mates, Rusty here. Let's chew the fat on what the river at Viana do Castelo is gonna serve up over the next couple of weeks. It's a proper game of patience, with some absolute crackers mixed in with some real do-nothing days.

The big picture is a series of NW pulses, but the wind is the boss here. This river break cops it raw from the Atlantic, so when the breeze is bad, it's a total write-off. The water temp is nothing special, just your standard August warmth.

Right now, Thursday the 13th, forget it. Cross-onshore wind and a limp, weak swell (266). It's a mess. Friday the 14th morning gets clean but the swell is tiny, just waist-high from the WNW (116). It's surfable but nothing to get excited about. Friday afternoon gets a little bigger, but the period drops to a shocking 6 seconds, so it's all bump and close-out.

Then we get the first real highlight. Saturday morning, the 15th of August. A solid 7 to 7-foot swell from the NW is on the cards with good energy (530), and the wind is a clean cross-offshore. Now, I gotta be straight with you—at this size on a river mouth, this is a big, dangerous wave. It's for experts only. The currents will be ripping, and the banks will be closing out hard. If you don't have the experience, stay on the sand. For the crew that do, it's a serious session.

Sunday the 16th morning is the one for the rest of us. The swell drops to a much friendlier 5 feet from the NNW (299) with a light offshore breeze. This is clean, punchy, and perfectly manageable for a solid intermediate. That's your best bet of the weekend. The afternoon gets cross-shore and lumpy, so get in early.

Early next week is quiet. Monday the 17th and Tuesday the 18th offer clean but tiny waves in the morning (168 and 118). Tuesday morning is actually glassy—dead calm—but the swell is only about 3 feet. A log or a fish session, at best. Wednesday the 19th is a total loss.

Now, for the second big swing. Thursday, the 20th of August. This is the big one. A long-period groundswell from the NW rolls in. Thursday morning is *glassy* with waves pushing 7 feet and a massive energy reading of 946. The period is a full 11 seconds. This is a true groundswell. But again, at 7 feet in a river mouth, this is only for the highly skilled. The power, the current, the shifting peaks—it's a beast. The afternoon holds the size but gets a cross-shore chop, so the window is tight.

Friday the 21st morning is the payoff. The swell backs off to a still-strong 5 feet, the wind is clean cross-offshore (421), and the energy is still pumping. This is the session you want to aim for. It's got the power from the day before but without the terrifying intensity. It's a proper, well-shaped groundswell.

After that, the second week is a real snooze. Saturday the 22nd morning is a small-wave clean-up (293), fine for a gentle paddle. Then from the 23rd through to the 28th, the wind turns onshore or cross-onshore, the swell gets inconsistent, and the energy drops right off. There's a glassy morning on the 27th of August with clean 4-foot waves (268) that might be worth a look if you're jonesing, but the power is low.

The bottom line: this fortnight is all about two windows. The first is Sunday morning, the 16th for the regular crew, and the big, expert-only action is Thursday morning, the 20th. The best all-rounder, though, is Friday morning, the 21st—big, clean, and powerful without being terrifying. After that, the surf pretty much rolls over and dies.

Rusty, signing off.

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