Viana do Castelo Surf Break

Lat Long: 41.69° N 8.85° W

Viana do Castelo Surf Forecast and Surf Report

Issued: 6 pm 13 Sep 2026 (local time)

Forecast update in  hr  min

Today's Viana do Castelo sea temperature is
16.9°C
1.9° 

Viana do Castelo surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Viana do Castelo surf forecast from 13 Sep 2026:

  • Best quality surf: Tuesday 15 Sep, 10PM (local time) - 7.5ft (2.3m), 7s period, NNW swell with cross-offshore winds.
  • Most powerful swell: Friday 18 Sep, 10PM (local time) - 10ft (3.0m), 14s period, NW swell with 3,067 kJ wave energy.
  • Next surfable swell (1★+): Monday 14 Sep, 1AM (local time) - 4ft (1.2m), 11s period with NW swell.

Best Forecast Surf Conditions for Viana do Castelo this week:

The surf forecast for Viana do Castelo over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 14) at 1AM. The primary swell is predicted to be 1.2m and 11s period with a secondary swell of 0.5m and 10s. The wind is predicted to be offshore as the swell arrives.

The most powerful waves expected at Viana do Castelo in the next 16 days are 3.0m 14s and forecast to arrive on Friday (Sep 18) at 10PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Tuesday (Sep 15) at 4PM.

Wave TypeTime (WEST) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Mon 14th Sep)4ft (1.2m) 11s
Best Surf10PM (Tue 15th Sep)7.5ft (2.3m) 7s
Most Powerful10PM (Fri 18th Sep)10ft (3.0m) 14s

Table - best surf conditions forecast for Viana do Castelo over the next 16 days.


The Lowdown

Alright folks, Rusty here. Let’s take a long, hard look at what’s coming up for the next couple of weeks at Viana do Castelo. We’ve got a classic river-mouth setup here, exposed to the west, so it’s all about picking the right windows when the wind plays ball and the swell isn't just raw power.

First things first, the water’s sitting at 62.4°, which is a noticeable 3.4° cooler than average for this time of year. You’ll want a good 4/3, maybe even booties if you’re feeling the cold.

Right off the bat, Sunday the 13th isn’t your day. We’ve got a 4.6ft NW swell, but the cross-shore wind and marginal conditions mean it’s a hard pass. You’re better off waiting.

Monday the 14th is where it starts to get interesting. The morning is a real gem – glassy conditions with a light southerly breeze, and a clean 2.6ft NW swell rolling in. The energy is moderate at 229, but with that glassy surface, it’s going to be fun, user-friendly waves. This is the pick of the first few days for a relaxed session. The afternoon turns cross-on and drops off, so get it while it’s good.

Tuesday the 15th is a write-off. The morning has tiny, weak 1.6ft surf (energy 116), and the afternoon gets hammered by a fresh 22 mph NNW breeze. That’s kite-surfing weather, not paddle-surfing.

Wednesday the 16th sees the swell jump up. Morning is a powerful 6.6ft NNW swell, but the period is a short, weak 8 seconds, and with 19 mph winds, it’s going to be a messy, blown-out mess. The afternoon is bigger at 7.5ft and even windier. That’s too much juice for this spot, and the forecast agrees – this is expert-only territory at best.

Now we’re talking. Thursday the 17th morning is a standout. We’ve got a clean 6.2ft NW swell with a moderate 10-second period, and here’s the kicker – a 9 mph NNE offshore wind. That’s going to groom the waves beautifully. The energy is solid at 678. This is the best session of the first week, no question. Get out there. The afternoon, however, gets blown out again by that fresh NNW wind and the swell pushes over 6.9ft – too big and messy.

Friday the 18th morning is salvageable with a clean 5.6ft NW swell and light winds, but the afternoon is another no-go. That 7.5ft NW swell with a 15-second period has a massive 2827 energy reading, but the 16 mph cross-off wind and the sheer size make it a beast for experts only. That long period will make it wall up at a river mouth, so it might be a bit straight.

Saturday the 19th morning is glassy, with a 6.9ft NW groundswell (13-second period, 1425 energy). It sounds incredible, but the forecast is clear: it’s too big for this break. A real shame. The afternoon cleans up a bit but the energy is still high.

Sunday the 20th morning is another absolute beauty. Glassy conditions, a clean 4.9ft NW swell with a 10-second period, and moderate energy at 512. This is a proper, clean, fun-size wave. The afternoon turns cross-off but remains clean.

And then we hit the sweet spot. Monday the 21st is the absolute highlight of the whole outlook. Morning is glassy, 6.6ft NW groundswell with a 13-second period and a whopping 1387 energy reading. The forecast calls it excellent for experienced surfers. This is a serious, powerful, well-shaped wave with no wind. The afternoon is just as good – 5.9ft, 14-second period, 1215 energy, and clean. If you can only pick one day, this is it. Just be warned, it’s a step up in size and power.

Tuesday the 22nd morning is another glassy, very good session with a 4.9ft NW swell. After that, things taper off fast. The rest of the week and into the next sees tiny, weak swell and poor conditions. There’s a long gap of ordinary to poor surf from the afternoon of the 22nd all the way through to the morning of the 28th. That’s nearly six days of nothing special.

Finally, on Monday the 28th, we get a small bump of hope. Morning sees a clean 3.6ft WNW swell with a 9-second period and light cross-off winds. It’s not big, but it’s clean and surfable after a long flat spell. The afternoon gets hammered by 25 mph rain and onshore wind, so don’t bother.

So, to sum it up: Monday the 21st is your absolute standout – two sessions of excellent, powerful, glassy groundswell for experienced surfers. Thursday the 17th morning is your best bet for the first week with that offshore wind and solid 6.2ft swell. And if you want a more relaxed, fun-sized wave, Monday the 14th morning and Sunday the 20th morning are your glassy, clean options. The rest is either too small, too windy, or too

Short Range Forecast

Mostly dry. Warm (max 30°C on Sun afternoon, min 17°C on Tue night). Winds increasing (calm on Sun night, fresh winds from the NNW by Tue afternoon).

Days 5-7 Weather Summary

Mostly dry. Warm (max 28°C on Sat morning, min 14°C on Wed night). Winds decreasing (fresh winds from the N on Wed afternoon, calm by Sat morning).

Sun
13
Monday
14
Tuesday
15
Wednesday
16
Thursday
17
Friday
18
Saturday
19
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
2
2
1
1
1
0
!
1
!
!
3
!
1
2
!
!
!
2
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.4
NW
12
1.2
NW
11
0.8
NW
11
0.8
NW
11
0.6
NW
10
0.4
NW
12
0.7
WNW
11
2.3
NW
7
2
NNW
8
2.3
NNW
8
2.4
NW
10
1.9
NW
10
2.1
NW
10
1.7
NNW
7
1.7
NW
9
2.3
NW
15
2.5
NW
14
2.1
NW
13
1.8
NW
13
1.6
NW
12
Wave Graph
Metric surfscale
Energy kJ
533
369
165
137
77
40
103
569
508
666
1288
678
815
277
481
2326
2570
1417
990
711
Wind (km/h)
10
NW
5
ENE
5
S
10
WNW
5
NNW
10
NNW
35
NNW
30
N
30
N
35
NNW
20
NNE
15
NNE
35
NNW
25
N
10
NNE
25
NNW
10
NNE
5
ENE
15
NNW
10
ENE
Wind State
cross
off
glassy
cross-on
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross-off
off
glassy
cross-off
cross-off
High Tide
5:10PM3.47m
5:30AM3.34m
5:42PM3.31m
6:01AM3.21m
6:15PM3.11m
6:33AM3.04m
6:49PM2.89m
7:09AM2.85m
7:28PM2.65m
7:51AM2.67m
8:22PM2.44m
8:54AM2.51m
9:48PM2.29m
Low Tide
11:16PM0.55m
11:29AM0.69m
11:46PM0.70m
12:02PM0.84m
00:17AM0.90m
12:36PM1.03m
00:49AM1.11m
1:14PM1.23m
1:27AM1.33m
2:04PM1.43m
2:19AM1.54m
3:24PM1.58m
3:50AM1.68m
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:13
7:13
7:15
7:16
7:16
7:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:49
7:46
7:45
7:44
7:42
7:39
7:37
 mm
Temp °C
30
27
28
27
22
24
24
19
23
25
18
21
23
18
24
26
23
28
28
26
Feels °C
28
26
27
26
22
21
19
15
17
18
12
17
17
13
21
21
19
25
24
23
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Viana do Castelo Surf forecast

The above surf forecast table for Viana do Castelo provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Viana do Castelo can be found by selecting the local surf guide option on the grey menu. Our Viana do Castelo surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Viana do Castelo) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Viana do Castelo may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Viana do Castelo is 3 km (2 miles) from Viana do Castelo. If you plan a holiday in Douro and Minho, look for hotels and other accommodation in Viana do Castelo. Viana do Castelo has rooms for a wide range of budgets as well as car hire and transport links.

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