Viana do Castelo Surf Break

Lat Long: 41.69° N 8.85° W

Viana do Castelo Surf Forecast and Surf Report

Issued: 12 am 29 Jul 2026 (local time)

Forecast update in  hr  min

Today's Viana do Castelo sea temperature is
20.6° C
1.9° 

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 29 Jul 2026:

  • Best quality surf: Wednesday 29 Jul, 4AM (local time) - 2.5ft (0.8m), 9s period, NW swell with cross-offshore winds.
  • Most powerful swell: Monday 3 Aug, 4PM (local time) - 3ft (0.9m), 9s period, W swell with 137 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 29 Jul, 4AM (local time) - 2.5ft (0.8m), 9s 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 Wednesday (Jul 29) at 4AM. The primary swell is predicted to be 0.8m and 9s period with a secondary swell of 0.3m and 11s. 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 0.9m 9s and forecast to arrive on Monday (Aug 03) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 6s period and expected on Friday (Jul 31) at 10PM.

Wave TypeTime (WEST) & Date Wave Height & Period
Next good surf (1 star+) 4AM (Wed 29th Jul)2.5ft (0.8m) 9s
Best Surf 4AM (Wed 29th Jul)2.5ft (0.8m) 9s
Most Powerful 4PM (Mon 3rd Aug)3ft (0.9m) 9s

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


The Lowdown

Alright folks, Rusty here. Let’s look at what the next couple of weeks are shaping up like for Viana do Castelo.

Right off the bat, I gotta be honest with you – the first week or so is pretty flat and tired. The swell is tiny, the period is short, and most of the time there’s a cross or cross-onshore breeze messing things up. The early part of the window is a real struggle. We’re looking at a lot of days where the waves are just knee-high and gutless, with combined swell energy barely cracking 100 (57–206 range). The water is sitting at 69°F, which is a touch warmer than normal for this time of year, so that’s one small comfort if you’re just floating around.

The first real glimmer of hope comes on the morning of Thursday the 30th of July. The wind goes glassy, and we’ve got a tiny 2 ft swell from the WNW with a 10-second period. It’s not gonna win any awards, but it’s clean and surfable. Same story on the morning of Friday the 31st of July – glassy again, little 1 ft waves. Really just a longboard or a foiler kind of session.

There’s a bit of a lull over the weekend and into early next week, but keep an eye on the morning of Monday the 3rd of August. Glassy conditions again, with a 2 ft swell from the west. The energy is low (89), but it’s clean. Same deal on the morning of Tuesday the 4th of August – glassy, 3 ft west swell.

Now, the real standout comes later. The morning of Wednesday the 12th of August is looking promising. Glassy conditions, a 4 ft swell from the WNW with a 9-second period, and combined energy of 197 (moderate). That’s a solid little bump. The water is still that same nice temperature. Then the afternoon of the 12th of August is the best of the entire forecast. The swell picks up to 5 ft from the WNW, still 9-second period, and the energy jumps to 281 (moderate). The wind is a clean cross-offshore from the NW, and the report says “expect good surf conditions.” That’s the one to circle.

For the rest of the second week, we’ve got a few mornings with clean cross-offshore winds (like the 8th, 10th, and 11th of August), but the swell is small, between 2 ft and 4 ft, and the period is short (6-8 seconds). The energy is mostly weak (57–183). It’s rideable, but nothing special.

Oh, and Friday the 7th of August afternoon? That’s a raw 6 ft NNW swell with a 6-second period and 354 energy (strong), but it’s coming in with onshore wind and the report says poor surf. That’s a messy, choppy, close-out situation. Kite surfers might be getting excited, but for paddle surfing, it’s a no-go.

So, my pick of the whole 16 days is the afternoon of Wednesday the 12th of August. That’s the one with the best combo of size, clean wind, and decent energy. The morning of the 12th is a solid backup.

Viana do Castelo is a river break, so it’s exposed to the west swell, and the optimum direction is west. The swell we’re seeing is mostly from the WNW and NW, which is close enough to do the job. It’s fairly consistent, but beginners should be careful when it gets over 5 ft. Crowds are often an issue here, so get out early if you can.

Rusty signing off.

Short Range Forecast

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

Days 4-6 Weather Summary

Mostly dry. Warm (max 22°C on Sat morning, min 16°C on Sat night). Wind will be generally light.

Wednesday
29
Thursday
30
Friday
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
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
1
0
1
1
0
1
0
0
1
1
0
1
0
0
1
0
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)
0.8
NW
9
0.7
NW
8
0.5
WNW
10
0.5
WNW
10
0.5
WNW
10
0.9
NW
6
0.4
WNW
9
0.4
WNW
9
1.2
NNW
6
0.7
W
9
0.7
W
9
0.7
W
9
0.7
W
9
0.7
W
9
0.8
W
9
0.8
W
10
0.9
W
9
0.5
W
9
0.7
W
9
0.7
W
8
0.6
W
9
Wave Graph
Metric surfscale
Energy kJ
107
69
55
52
51
50
26
26
90
73
71
76
73
78
95
117
137
42
76
69
53
Wind (km/h)
5
NW
15
WNW
10
N
5
WSW
15
WNW
5
ESE
10
NNW
20
NW
5
NNE
5
SSW
5
WNW
5
S
5
W
15
NW
5
NE
10
SSE
10
WSW
5
ESE
5
SSW
10
W
10
N
Wind State
cross
cross
cross-off
glassy
cross
cross-off
cross-off
cross
cross-off
cross-on
cross-on
glassy
glassy
cross
glassy
cross-on
cross-on
glassy
cross-on
cross-on
cross-off
High Tide
3:52PM3.23m
4:14AM3.02m
4:25PM3.32m
4:46AM3.11m
4:57PM3.39m
5:18AM3.16m
5:31PM3.41m
5:52AM3.19m
6:06PM3.38m
6:30AM3.18m
6:45PM3.29m
7:12AM3.12m
7:29PM3.16m
Low Tide
9:34AM0.95m
10:03PM0.81m
10:07AM0.85m
10:35PM0.72m
10:40AM0.77m
11:08PM0.66m
11:15AM0.72m
11:41PM0.64m
11:50AM0.73m
00:18AM0.66m
12:30PM0.78m
00:57AM0.73m
1:14PM0.89m
1:42AM0.85m
clear
part cloud
part cloud
part cloud
cloud
clear
clear
part cloud
part cloud
clear
part cloud
clear
clear
clear
part cloud
cloud
clear
clear
part cloud
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:26
6:26
6:28
6:28
6:28
6:30
6:31
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:57
8:55
8:54
8:52
8:52
8:51
8:50
 mm
Temp °C
21
21
17
21
20
17
22
21
19
22
22
18
21
21
18
21
22
19
22
22
19
Feels °C
21
21
17
21
19
17
21
19
20
22
23
19
20
20
18
21
23
21
23
22
20
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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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