Viana do Castelo Surf Break

Lat Long: 41.69° N 8.85° W

Viana do Castelo Surf Forecast and Surf Report

Issued: 12 pm 26 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 26 Aug 2026:

  • Best quality surf: Friday 28 Aug, 7AM (local time) - 8ft (2.5m), 11s period, WNW swell with cross-onshore winds.
  • Most powerful swell: Friday 28 Aug, 1PM (local time) - 10ft (3.0m), 11s period, WNW swell with 2,200 kJ wave energy.
  • Next surfable swell (1★+): Friday 28 Aug, 7AM (local time) - 8ft (2.5m), 11s 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 Friday (Aug 28) at 7AM. The primary swell is predicted to be 2.5m and 11s period. The wind is predicted to be cross-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 1.0m 5s period and expected on Monday (Aug 31) at 7PM.

Wave TypeTime (WEST) & Date Wave Height & Period
Next good surf (1 star+) 7AM (Fri 28th Aug)8ft (2.5m) 11s
Best Surf 7AM (Fri 28th Aug)8ft (2.5m) 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, Rusty here. Let's break down what's on the menu for the Viana do Castelo stretch over the next couple of weeks.

First up, the water is a bit cooler than usual for this time of year, sitting at 63°F, which is a couple of degrees off the mark. We've got a bit of a slow start, with a few days of pretty ordinary conditions. Wednesday the 26th and Thursday the 27th are a write-off, with messy, onshore winds and weak, choppy surf. Nothing to get excited about there.

Then things get interesting. Friday the 28th is the real standout. The morning brings a solid 8ft WNW groundswell, with a period of 10 seconds, and the wind goes glassy. That's a rare combo for this spot. The combined energy is strong, hitting 1450, so there's plenty of push. Just keep in mind, this is a river break, so a long-period swell like this can sometimes make it a bit wonky, but the glassy conditions might just make it perfect for the experienced crew. The afternoon holds similar size but goes cross-shore. Friday morning is the pick of the whole forecast.

Saturday the 29th is a total letdown after that. The swell drops right off, with a tiny 4ft in the morning. The glassy conditions are nice, but 4ft with an 8-second period is just weak. It's a classic case of "all show, no go."

The next real glimmer of hope comes on Monday the 31st of August. We've got a clean 6ft to 6ft NW swell rolling in, with a moderate cross-offshore breeze. The energy is solid, around 647 to 677. It's a consistent, surfable wave, good for a range of abilities. The morning session looks better.

After that, the surf drops off again. Tuesday the 1st of September is smaller, and the wind picks up. The trend is a general decline, with a few tiny, weak days, but the clean offshore winds are a nice touch for the kite surfers looking for a session.

Looking further ahead, there's a promising pulse on the horizon. Saturday the 5th of September shows a clean 6ft NW swell with a 12-second period and a nice cross-offshore breeze. The energy is back up to 1019, which is strong. That's one for the experienced surfers, as it'll be a bit punchy. The next morning, Sunday the 6th, is also very clean at 5ft, and Monday the 7th has a super long-period groundswell coming in at 4ft with a 15-second period. That's a real treat for the points and reefs, but might be a bit too straight for the river mouth. The glassy conditions on Monday morning make it a must-check.

The second week looks a bit more ordinary, with smaller swells and less consistent energy. The solid pulses are mostly in the first 10 days, so make the most of that Friday the 28th and the start of the following week.

Rusty.

Short Range Forecast

Heavy rain (total 66mm), heaviest during Thu morning. Warm (max 21°C on Fri afternoon, min 15°C on Wed night). Winds decreasing (fresh winds from the S on Wed morning, calm by Fri night).

Days 4-6 Weather Summary

Mostly dry. Warm (max 22°C on Sun morning, min 15°C on Mon night). Wind will be generally light.

Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
1
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
0
1
0
0
!
!
3
2
0
2
2
1
2
2
2
2
1
0
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
S
5
1.7
SW
7
1.4
WSW
7
1.3
WSW
7
0.8
NW
8
1.8
W
10
3
WNW
10
3
WNW
10
2
WNW
9
1.3
WNW
8
1.2
NW
8
1.4
NW
8
1.7
NW
10
1.6
NW
10
1.4
NW
9
1.6
NW
10
1.7
NW
10
1.8
NW
9
1.4
NW
9
1.6
NW
9
1.7
NNW
8
Wave Graph
Metric surfscale
Energy kJ
48
246
171
147
80
666
2006
1708
618
219
173
238
580
441
294
476
535
561
321
359
339
Wind (km/h)
25
SSE
25
W
15
SSE
10
SW
15
SW
25
SSW
15
WNW
10
WNW
5
NE
5
SE
10
WNW
5
ESE
5
SSE
10
WNW
15
N
15
N
25
NNW
15
N
15
N
30
NNW
20
N
Wind State
cross
cross-on
cross-on
on
on
cross-on
cross-on
cross
glassy
glassy
cross
glassy
cross
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
2:56PM3.15m
3:17AM3.02m
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
Low Tide
9:07PM0.85m
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
rain showers
thunderstorm
heavy rain
heavy rain
rain showers
rain showers
rain showers
part cloud
clear
clear
clear
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:54
6:54
6:56
6:56
6:58
6:58
7:00
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:19
8:16
8:15
8:14
8:12
8:10
8:08
 mm
7
5
11
26
4
12
1
Temp °C
18
19
17
16
18
18
20
21
19
20
20
19
22
22
18
20
21
17
21
21
19
Feels °C
15
16
17
13
17
16
19
20
19
19
20
21
23
22
17
17
18
15
17
17
16
  • 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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