Viana do Castelo Surf Break

Lat Long: 41.69° N 8.85° W

Viana do Castelo Surf Forecast and Surf Report

Issued: 12 am 08 Sep 2026 (local time)

Forecast update in  hr  min

Today's Viana do Castelo sea temperature is
19.4°C
0.5° 

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 8 Sep 2026:

  • Best quality surf: Saturday 12 Sep, 10PM (local time) - 2.5ft (0.8m), 14s period, NW swell with cross-offshore winds.
  • Most powerful swell: Sunday 13 Sep, 10AM (local time) - 5ft (1.6m), 12s period, NW swell with 741 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 8 Sep, 4AM (local time) - 5ft (1.5m), 10s period with WNW 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 Tuesday (Sep 08) at 4AM. The primary swell is predicted to be 1.5m and 10s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Viana do Castelo in the next 16 days are 1.6m 12s and forecast to arrive on Sunday (Sep 13) at 10AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 5s period and expected on Thursday (Sep 10) at 7PM.

Wave TypeTime (WEST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Tue 8th Sep)5ft (1.5m) 10s
Best Surf10PM (Sat 12th Sep)2.5ft (0.8m) 14s
Most Powerful10AM (Sun 13th Sep)5ft (1.6m) 12s

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


The Lowdown

Alright, let’s get into it.

The next couple of days are going to be a bit of a waiting game. There’s a little pulse of energy but it’s not quite coming together. We’ve got a couple of days of small, fussy surf before things start to clean up and fill in.

Monday afternoon will be surfable but nothing to write home about. There’s a 5ft WNW swell at 12 seconds, but the cross-off wind is going to put some texture on it. It’s clean but a bit of a mess. The energy is moderate (780).

Tuesday morning is where you want to be. The wind drops to glass, and we get a clean 4ft WNW swell at 10 seconds. This is going to be your best bet for a fun, clean session in the short term. The energy is moderate (305). The water temp is 67°F, which is about average for this time of year. That’ll be the pick of the first half of the week.

After that it gets a bit ordinary. Wednesday has some size, but the wind gets up, and the period is short, which is going to make things messier. Thursday is a step down too. Friday and Saturday are pretty weak; the swell drops right off. There’s a bit of a lull here for a few days.

Now, the standout window. Keep your eyes on Sunday the 13th. The morning looks like the gold. We get a clean 4ft NW groundswell at 12 seconds, with a gentle cross-off breeze. This is going to be proper. The energy is strong (577), and the waves should have some real push to them. This is the one to circle.

Monday the 14th is also worth a paddle early. Glassy conditions with a 3ft NW swell. It’s smaller but clean, and should be fun on the banks.

Then we hit another few days of small, poor conditions. Not much doing from the 15th to the 20th. The swell drops right out, and what’s there is short-period and weak.

But hold on, there’s a big one brewing for the end of the window. Monday the 21st is looking like the best day of the whole forecast. The morning has a 5ft NW swell at 10 seconds, glassy wind, and very strong energy (1305). This is a serious pulse. The afternoon bumps up to a 6ft NW swell, but the wind will be a bit more cross. The morning is the one to be there for. It’s a week and a half out, so don’t book the day off yet, but it’s got serious potential.

Tuesday the 22nd keeps the size with a 6ft NNW swell and offshore morning winds. Another solid option.

So, for the whole forecast, don’t waste your time on the small days. The two standouts are Sunday morning the 13th and Monday morning the 21st. The 21st has more size and power, so that’s the big one to hope for.

This spot, Viana do Castelo, is a river break, so the long-period swells on the 13th could be a little straight, but the clean conditions should make it worth it. It’s fairly consistent, but don’t expect perfection on the small days.

Rusty.

Short Range Forecast

Light rain (total 5mm), mostly falling on Tue afternoon. Warm (max 22°C on Wed afternoon, min 15°C on Tue night). Winds increasing (calm on Tue afternoon, fresh winds from the NNW by Wed afternoon).

Days 4-6 Weather Summary

Mostly dry. Warm (max 31°C on Sun morning, min 17°C on Thu night). Winds decreasing (fresh winds from the NNW on Fri afternoon, calm by Sun morning).

Tuesday
8
Wednesday
9
Thursday
10
Friday
11
Saturday
12
Sunday
13
Monday
14
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
1
1
0
2
2
1
0
0
0
2
1
1
3
3
3
2
1
1
1
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.3
WNW
10
0.8
W
9
1.7
NW
8
1.3
NNW
8
1.4
NNW
8
1.6
NW
8
1.3
NNW
10
1.3
NNW
10
0.7
NNW
9
0.6
NW
8
1.4
NW
7
1.6
NW
7
1
NNW
7
0.6
NW
11
1.1
NW
13
1.6
NW
12
1.5
NW
12
1.3
NW
12
1.1
NW
11
0.8
NW
11
0.6
NW
10
Wave Graph
Metric surfscale
Energy kJ
305
103
389
237
248
283
333
301
75
54
171
233
96
97
398
741
666
455
292
162
77
Wind (km/h)
5
NW
5
SW
20
N
15
NNE
30
NNW
15
N
10
NNW
25
NNW
15
N
20
N
30
NNW
15
NNE
5
NE
15
NNW
10
NE
5
ENE
15
NW
10
E
5
SE
5
WSW
5
SSE
Wind State
cross
on
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
off
cross-off
off
glassy
cross-off
cross-off
cross
cross-on
glassy
High Tide
1:56PM3.21m
2:29AM3.14m
2:44PM3.40m
3:11AM3.31m
3:25PM3.54m
3:49AM3.42m
4:02PM3.59m
4:25AM3.46m
4:37PM3.56m
4:58AM3.43m
5:10PM3.47m
5:30AM3.34m
5:42PM3.31m
Low Tide
7:39AM1.00m
8:14PM0.75m
8:28AM0.80m
8:57PM0.56m
9:10AM0.64m
9:36PM0.45m
9:48AM0.55m
10:11PM0.41m
10:23AM0.53m
10:44PM0.45m
10:56AM0.58m
11:16PM0.55m
11:29AM0.69m
11:46PM0.70m
part cloud
light rain
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
7:07
7:07
7:09
7:09
7:11
7:11
7:13
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:57
7:55
7:53
7:52
7:51
7:49
7:46
 mm
5
Temp °C
21
19
19
21
22
19
21
21
17
25
27
23
28
28
26
31
31
28
30
29
24
Feels °C
22
21
19
17
16
17
19
17
14
22
23
20
27
25
25
30
29
26
27
26
23
  • Map Icons:
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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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