Viana do Castelo Surf Break

Lat Long: 41.69° N 8.85° W

Viana do Castelo Surf Forecast and Surf Report

Issued: 12 am 27 Aug 2026 (local time)

Forecast update in  hr  min

Today's Viana do Castelo sea temperature is
17.1°C
2.0° 

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 27 Aug 2026:

  • Best quality surf: Friday 28 Aug, 4AM (local time) - 7ft (2.2m), 11s period, W swell with onshore winds.
  • Most powerful swell: Friday 28 Aug, 1PM (local time) - 10ft (3.0m), 11s period, WNW swell with 1,807 kJ wave energy.
  • Next surfable swell (1★+): Friday 28 Aug, 4AM (local time) - 7ft (2.2m), 11s period with W 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 Friday (Aug 28) at 4AM. The primary swell is predicted to be 2.2m and 11s period. The wind is predicted to be onshore as the swell arrives.

The most powerful waves expected at Viana do Castelo in the next 16 days are 3.0m 11s and forecast to arrive on Friday (Aug 28) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 4s period and expected on Monday (Aug 31) at 7PM.

Wave TypeTime (WEST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Fri 28th Aug)7ft (2.2m) 11s
Best Surf 4AM (Fri 28th Aug)7ft (2.2m) 11s
Most Powerful 1PM (Fri 28th Aug)10ft (3.0m) 11s

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


The Lowdown

Alright, folks, let’s get into it. We’re looking at Viana do Castelo, a river mouth setup that’s exposed to the west. Water temps are feeling about average for the time of year, nothing wild there.

The next few days are a bit of a write-off, to be honest. Thursday the 27th is a complete no-go with heavy rain, cross-on wind, and poor surf, so don’t even bother. Friday the 28th actually has some serious swell rolling in – we’re talking 10ft from the WNW with a solid 11-second period, and the combined energy is pumping hard at 1785. But here’s the catch: that’s too big for this river break, so it’s really only for the experienced crew, and even then, it’s going to be a beast. The wind is light cross-onshore, so it’s not completely blown out, but expect a challenge. Saturday the 29th drops right back down to weak, marginal surf, and Sunday the 30th stays in that same mediocre zone with cross-shore winds.

Now, Monday the 31st morning is where things start to look interesting. The swell is a clean 5ft from the NW at 9 seconds, with a cross-offshore breeze from the north. That’s clean, workable surf with moderate energy (646), and the wave comment says “expect good surf conditions.” That’s your best bet early in the week. Tuesday the 1st of September stays clean but the swell is a little smaller, still surfable.

After that, we hit a bit of a lull from Wednesday the 2nd through Thursday the 3rd, with small, weak, ordinary waves. Friday the 4th afternoon has a small, clean 2ft swell from the NW with a longer 10-second period, giving you clean waves, but it’s small.

Here’s the real standout: Saturday the 5th of September. Morning and afternoon both look firing. Swell is 5ft from the NW with a long 12-second period, giving it real push and shape. The combined energy is solid at 668 and 534. And the wind? Glassy. Both sessions are glassy. That’s the pick of the entire forecast – clean, lined-up waves for everyone. The longer period means it’ll be a bit more powerful, but that’s a good thing. Keep an eye on it.

The following week offers a few more promising windows. Monday the 7th morning has glassy 4ft swell from the NW, and then Thursday the 10th morning looks very good: 5ft from the NW at 10 seconds, clean cross-offshore wind, and energy at 651. That’s another session to circle. The 11th of September Friday morning is also clean and surfable.

So, if you’re looking for the best of the bunch, lock in Saturday the 5th of September. That’s the one. Viana do Castelo will be clean, with a solid, long-period NW swell. Get on it.

Rusty.

Short Range Forecast

Heavy rain (total 47mm), heaviest during Thu morning. Warm (max 21°C on Fri afternoon, min 15°C on Wed night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 24°C on Tue afternoon, min 15°C on Mon night). Wind will be generally light.

Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
Wednesday
2
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
1
!
!
3
1
0
1
2
1
2
2
2
2
1
0
1
1
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.1
W
7
1
W
8
1.1
W
10
3
WNW
11
2.5
WNW
10
2
WNW
9
1.4
NW
8
1.3
WNW
8
1.4
WNW
8
1.7
NW
10
1.5
NW
10
1.3
WNW
9
1.5
NW
9
1.8
NW
10
1.8
NW
9
1.6
NW
9
1.7
NW
8
1.7
NW
7
1.2
NW
7
1.1
NW
7
1.5
NNW
7
Wave Graph
Metric surfscale
Energy kJ
121
122
259
1785
1490
651
268
198
242
557
398
270
373
614
573
376
398
318
156
136
211
Wind (km/h)
15
SSW
15
SW
15
SSW
10
WNW
10
WNW
5
ESE
10
SSE
10
WSW
5
S
5
NW
10
NW
10
NNE
15
N
25
NNW
20
N
15
N
25
NNW
20
N
10
NNE
20
NNW
10
NE
Wind State
cross-on
on
cross-on
cross-on
cross-on
cross-off
cross
on
cross-on
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
off
High Tide
3:28PM3.31m
3:48AM3.18m
4:00PM3.44m
4:19AM3.30m
4:32PM3.52m
4:52AM3.38m
5:06PM3.53m
5:26AM3.40m
5:42PM3.47m
6:03AM3.36m
6:21PM3.33m
6:45AM3.25m
7:05PM3.14m
Low Tide
9:12AM0.85m
9:38PM0.69m
9:45AM0.70m
10:09PM0.57m
10:18AM0.59m
10:41PM0.50m
10:52AM0.54m
11:14PM0.48m
11:28AM0.56m
11:50PM0.54m
12:07PM0.65m
00:29AM0.66m
12:52PM0.81m
1:14AM0.85m
heavy rain
rain showers
rain showers
rain showers
part cloud
clear
clear
clear
part cloud
clear
clear
part cloud
cloud
clear
part cloud
part cloud
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:56
6:56
6:58
6:58
7:00
7:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:16
8:15
8:14
8:12
8:10
8:08
8:07
 mm
21
2
8
3
Temp °C
16
18
18
20
21
19
20
20
19
20
20
18
21
20
17
22
24
19
27
29
27
Feels °C
14
16
17
20
20
20
19
20
21
20
19
17
19
17
15
19
20
16
25
26
25
  • Map Icons:
  • Break
  • 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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