Viana do Castelo Surf Break

Lat Long: 41.69° N 8.85° W

Viana do Castelo Surf Forecast and Surf Report

Issued: 6 pm 05 Sep 2026 (local time)

Forecast update in  hr  min

Today's Viana do Castelo sea temperature is
19.7°C
0.8° 

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 5 Sep 2026:

  • Best quality surf: Monday 7 Sep, 4AM (local time) - 5ft (1.5m), 13s period, W swell with cross-offshore winds.
  • Most powerful swell: Monday 7 Sep, 7AM (local time) - 6ft (1.9m), 13s period, WNW swell with 1,121 kJ wave energy.
  • Next surfable swell (1★+): Sunday 6 Sep, 1AM (local time) - 4.5ft (1.4m), 12s 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 Sunday (Sep 06) at 1AM. The primary swell is predicted to be 1.4m and 12s period with a secondary swell of 0.6m and 9s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Viana do Castelo in the next 16 days are 1.9m 13s and forecast to arrive on Monday (Sep 07) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Thursday (Sep 10) at 7PM.

Wave TypeTime (WEST) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Sun 6th Sep)4.5ft (1.4m) 12s
Best Surf 4AM (Mon 7th Sep)5ft (1.5m) 13s
Most Powerful 7AM (Mon 7th Sep)6ft (1.9m) 13s

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


The Lowdown

Alright lads, Rusty here. Let’s break down the surf at Viana do Castelo for the next couple of weeks.

First off, don’t bother with Saturday afternoon. It’s a weak 4ft NW swell with a cross-on breeze – messy and marginal. The energy is low (625) and it’s just not worth paddling out.

Sunday morning is cleaner with a cross-off wind, but the swell is still only 4ft. Water temp is 68°F, which is standard for this time of year – nothing weird. The real standout is Monday, September 7th. Monday morning is the best of the first week. We’ve got a solid 6ft WNW groundswell (period 12 seconds) with a clean cross-off wind. The energy is pumping (1101) – strong stuff. This is excellent surf for experienced surfers. At 6ft, it’s too big for beginners. The river mouth will handle the long period well, shaping up clean waves. Monday afternoon gets windier, so get out early.

Tuesday the 8th drops to 4ft, still clean in the morning. Wednesday the 9th is a write-off – the swell is 6ft but the wind is up to 22 mph, just making a mess. Thursday the 10th is marginal. By Friday the 11th, the swell dies to 2ft and 1ft – tiny leftovers. That flat spell runs through the weekend, with a small bump on Sunday the 13th (3ft, longer period 11 seconds) but it’s still not great.

Then we get a bit of hope. Monday the 14th is glassy in the morning with a 5ft NW swell. That’s a clean session, though the energy is moderate (393). Not a standout, but a solid session. Tuesday the 15th is glassy again but only 2ft – too small. The real second-week highlight is Wednesday, September 16th morning. That’s glassy, 3ft NW swell with a very long period of 13 seconds. The energy is strong (571) and the conditions are set for a very good session. The long period will make the river mouth waves peel nicely.

After that, it’s a slow fade back to small, clean but unremarkable surf through the 19th and 20th. Mostly 4ft days with glassy or light winds – fine for a longboard.

If you’re picking one session, it’s Monday morning, September 7th – that’s the one. The Wednesday 16th morning is a solid backup, but it’s a long way out. Viana do Castelo gets crowded often on the good days, so set your alarm early.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 26°C on Sat afternoon, min 16°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Light rain (total 2mm), mostly falling on Tue afternoon. Warm (max 24°C on Fri morning, min 14°C on Tue night). Winds increasing (light winds from the WNW on Tue afternoon, fresh winds from the NNW by Wed afternoon).

Sat
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
Thursday
10
Friday
11
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
3
2
1
3
4
2
2
2
0
1
1
0
2
2
0
0
1
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.2
NW
13
1.4
NW
12
1.2
NW
11
1
NW
10
1.4
WNW
14
1.9
WNW
12
1.6
WNW
12
1.7
WNW
11
1.3
WNW
10
0.8
NW
9
1.6
NW
8
1.8
NW
8
1.9
NW
8
1.6
NNW
7
1.5
NNW
10
1.4
NNW
10
0.3
W
7
0.6
NW
9
0.3
W
7
0.1
W
13
Wave Graph
Metric surfscale
Energy kJ
495
555
332
212
811
1002
718
627
325
109
327
398
434
257
471
356
9
49
8
3
Wind (km/h)
5
WNW
0
ENE
10
NNW
20
NNW
15
N
15
NNW
25
NNW
15
NNW
10
NNW
10
WNW
25
N
20
N
35
NNW
20
N
15
N
30
NNW
15
N
15
N
30
NNW
20
N
Wind State
cross-on
glassy
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-on
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
10:52PM2.60m
11:36AM2.81m
00:27AM2.70m
12:57PM2.98m
1:37AM2.92m
1:56PM3.21m
2:29AM3.14m
2:44PM3.40m
3:11AM3.31m
3:25PM3.54m
3:49AM3.42m
4:02PM3.59m
Low Tide
4:32PM1.31m
5:07AM1.34m
6:10PM1.20m
6:35AM1.21m
7:21PM0.98m
7:39AM1.00m
8:14PM0.75m
8:28AM0.80m
8:57PM0.56m
9:10AM0.64m
9:36PM0.45m
9:48AM0.55m
10:11PM0.41m
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
light rain
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:05
7:05
7:07
7:07
7:09
7:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:02
8:00
7:59
7:57
7:55
7:53
7:52
 mm
2
Temp °C
26
23
23
22
19
24
22
18
21
20
19
21
23
18
21
21
18
24
26
22
Feels °C
25
23
23
21
18
22
20
17
20
21
20
16
17
14
17
16
15
20
22
19
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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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