Viana do Castelo Surf Break

Lat Long: 41.69° N 8.85° W

Viana do Castelo Surf Forecast and Surf Report

Issued: 12 am 16 Sep 2026 (local time)

Forecast update in  hr  min

Today's Viana do Castelo sea temperature is
18.0°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 16 Sep 2026:

  • Best quality surf: Wednesday 16 Sep, 1PM (local time) - 7ft (2.1m), 8s period, NNW swell with cross-offshore winds.
  • Most powerful swell: Friday 18 Sep, 7PM (local time) - 8ft (2.5m), 14s period, NW swell with 2,944 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 16 Sep, 1PM (local time) - 7ft (2.1m), 8s period with NNW 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 Wednesday (Sep 16) at 1PM. The primary swell is predicted to be 2.1m and 8s period with a secondary swell of 0.9m and 10s. Another secondary swell of 0.3m and 13s is also forecast. 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 2.5m 14s and forecast to arrive on Friday (Sep 18) at 7PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Friday (Sep 18) at 4AM.

Wave TypeTime (WEST) & Date Wave Height & Period
Next good surf (1 star+) 1PM (Wed 16th Sep)7ft (2.1m) 8s
Best Surf 1PM (Wed 16th Sep)7ft (2.1m) 8s
Most Powerful 7PM (Fri 18th Sep)8ft (2.5m) 14s

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


The Lowdown

G’day, Rusty here checking out the Viana do Castelo stretch. We’ve got a slow start, but there’s a couple of proper days coming up if you play it smart.

The first real surf is on Thursday the 17th. Wednesday is a bust – too much cross-off wind and messy short-period swell. Thursday morning has a clean 1.8m from the NW at 10 seconds, with a light cross-off breeze. Combined energy is moderate at 680. It’s surfable, but not exciting. Morning is the call.

Now Friday the 18th is a proper standout. We’ve got 1.8m from the NW, but the period jumps to 13 seconds – that’s real groundswell. The energy is strong at 1191, and we’ve got a light offshore from the NNE. The waves will have real shape and power. The long period might make it a bit straight at this river break, but with that offshore wind, it’s going to be clean. This is the pick of the early days.

Saturday the 19th is almost as good. 2.0m from the NW at 13 seconds, energy at 1334. Another light offshore in the morning. A great session for the experienced crew. Sunday the 20th still has some size at 1.6m, but the afternoon gets a little messy. Morning is still good.

Then it fades through Monday afternoon and Tuesday the 22nd. Swell drops to under a metre. No power. Not worth it.

Here’s the big one – Wednesday the 23rd. The swell builds back to 1.9m from the WNW, period goes up to 14 seconds, and the energy is a strong 1455. The wind is dead calm – glassy. That’s a magic morning. Big, clean, powerful waves, but only for experts. Get out early before the breeze picks up.

We’re on the downslide Thursday the 24th at 1.4m, and then it goes flat for a few days through the 26th and 27th. Tiny, powerless waves.

But hold on – Monday the 28th. The swell is back at 1.5m from the WNW with a huge 16-second period. The energy is massive at 1837. And it’s glassy. That’s a rare combination of size, power, and perfect conditions. The super long period might make it break a bit straight at the river mouth, but with that glass, it’s going to be an epic session. The afternoon is a no-go though – it jumps to 2.4m, and that’s too big for this break. The sandbar just won’t hold.

Tuesday the 29th is onshore junk at 2-1.8m. Not great. Then Wednesday the 30th is too big again at 2.1m. And October 1st is a mess – 2.2m from the W, pushing hard. Skip those.

So if you want the best two sessions, it’s Friday the 18th morning and Wednesday the 23rd morning. Those are the standouts. The water temp is about normal for this time of year, nothing crazy.

Keep your wits about you, and don’t get caught on the inside when the big sets roll through.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 24°C on Wed afternoon, min 14°C on Wed night). Winds decreasing (fresh winds from the NNW on Wed afternoon, light winds from the NNE by Fri morning).

Days 4-6 Weather Summary

Mostly dry. Warm (max 31°C on Sun morning, min 19°C on Fri night). Wind will be generally light.

Wednesday
16
Thursday
17
Friday
18
Saturday
19
Sunday
20
Monday
21
Tuesday
22
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
!
3
1
1
4
!
!
4
4
3
3
0
2
3
1
2
2
2
4
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
2
NNW
8
2.5
NW
8
2.4
NW
11
1.8
NW
10
2
NW
10
1.1
NW
9
1.8
NW
13
2.1
NW
12
2.5
NW
14
2
NW
13
1.8
NW
13
1.8
NW
12
1.6
NW
11
1.4
NW
11
1.2
NW
10
1.5
NW
12
1.3
NW
12
1.3
NW
12
1.1
NW
12
0.8
WNW
18
1.5
WNW
16
Wave Graph
Metric surfscale
Energy kJ
502
794
1338
680
753
183
1162
1276
2534
1326
1006
880
574
449
290
614
486
469
349
368
1136
Wind (km/h)
30
N
40
NNW
25
NNE
15
NNE
35
NNW
25
N
10
NNE
25
NNW
15
N
5
NE
15
NW
10
ENE
5
E
15
NW
10
NE
5
SE
15
NW
10
NE
5
ESE
10
NW
5
NE
Wind State
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
cross-off
cross-off
off
cross-off
cross-off
cross-off
cross
off
cross-off
cross
off
glassy
cross
off
High Tide
6:33AM3.04m
6:49PM2.89m
7:09AM2.85m
7:28PM2.65m
7:51AM2.67m
8:22PM2.44m
8:54AM2.51m
9:48PM2.29m
10:30AM2.45m
11:38PM2.32m
12:03PM2.55m
00:51AM2.49m
1:03PM2.75m
1:36AM2.70m
Low Tide
12:36PM1.03m
00:49AM1.11m
1:14PM1.23m
1:27AM1.33m
2:04PM1.43m
2:19AM1.54m
3:24PM1.58m
3:50AM1.68m
5:18PM1.57m
5:40AM1.63m
6:36PM1.41m
6:47AM1.44m
7:24PM1.20m
clear
clear
part cloud
part cloud
clear
clear
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>
7:15
7:16
7:16
7:18
7:20
7:20
7:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:44
7:42
7:39
7:37
7:37
7:35
7:32
 mm
Temp °C
23
24
19
21
22
18
23
24
21
27
26
27
31
30
28
31
29
27
30
29
26
Feels °C
17
17
14
17
16
13
20
19
18
25
23
24
29
26
25
29
25
24
28
26
24
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Viana do Castelo:

join our community of surf reporters

FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Viana do Castelo surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.


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.

Nearest locationNearest