Viana do Castelo Surf Break

Lat Long: 41.69° N 8.85° W

Viana do Castelo Surf Forecast and Surf Report

Issued: 6 am 31 Jul 2026 (local time)

Forecast update in  hr  min

Today's Viana do Castelo sea temperature is
19.1° C
0.3° 

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 31 Jul 2026:

  • Best quality surf: Friday 31 Jul, 10PM (local time) - 2ft (0.6m), 10s period, W swell with cross-offshore winds.
  • Most powerful swell: Monday 3 Aug, 7PM (local time) - 4ft (1.2m), 8s period, W swell with 172 kJ wave energy.
  • Next surfable swell (1★+): Friday 31 Jul, 10PM (local time) - 2ft (0.6m), 10s 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 (Jul 31) at 10PM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.2m and 9s. 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 1.2m 8s and forecast to arrive on Monday (Aug 03) at 7PM. 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+)10PM (Fri 31st Jul)2ft (0.6m) 10s
Best Surf10PM (Fri 31st Jul)2ft (0.6m) 10s
Most Powerful 7PM (Mon 3rd Aug)4ft (1.2m) 8s

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


The Lowdown

Alright, let’s break it down. Your local surf reporter Rusty here, looking at the next couple of weeks.

Right off the bat, I’ll be straight with you – there’s no real standout swell on the cards. The whole 16-day window is a pretty flat run, with only small, often weak pulses of energy. The first few days are a write-off for anything decent, and it stays that way right through.

We’re looking at Viana do Castelo, a river break that’s exposed to the west. It’s fairly consistent, but for most of this period, the wave heights are tiny – from 1ft to barely 4ft. The energy is weak, with combined swell energy often in the low double digits (40–54) for the first few days, and only occasionally bumping into the 100–200 range (like 126 on Saturday morning, 1 August, or 173 on Monday afternoon, 3 August). But even then, the period is short, mostly 8 or 9 seconds, so it’s not muscle-y groundswell.

The real killer is the wind. On Friday morning, 31 July, we get a little 1ft WNW swell with 5 km/h cross-offshore wind from the NNW, so it’s clean, but that’s about it. The water temperature is 66°F, which is just about normal for the time of year, so no drama there.

The only morning that gives me a little hope is Sunday morning, 9 August. We’ve got 3ft from the WNW, with a period of 8 seconds, and the wind is glassy from the SW at 5 km/h. That’s the best you’ll see – clean, small, but surfable. So if you’re desperate, mark that date. But it’s still only 3ft, and the energy is 145, so it’s ordinary.

For the rest of the window, it’s a mix of onshore and cross-shore winds, often moderate to fresh breezes (20–30 km/h), which will chop up the surface. The swell never gets above 4ft, and most days are cross-off or cross-shore, not truly offshore. So it’s more of a longboard or funboard kind of affair, if you’re lucky.

Given the very small size and the persistent wind, this setup looks more interesting for kite surfing than paddle surfing, especially on the afternoons with stronger NW winds.

So, honestly, there’s no big swell, no epic conditions, no must-surf day. If you’re a beginner, the small waves are fine, but the wind is a problem. The best you’ll do is a clean 2ft–3ft morning. It’s a long gap of mediocrity. Forecasts can change, but as it stands, keep your expectations low.

Rusty.

Short Range Forecast

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

Days 4-6 Weather Summary

Light rain (total 2mm), mostly falling on Mon night. Warm (max 23°C on Mon afternoon, min 16°C on Wed night). Wind will be generally light.

Friday
31
Saturday
1
Sunday
2
Monday
3
Tuesday
4
Wednesday
5
Thursday
6
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
0
0
0
1
0
1
0
0
1
0
0
1
1
0
0
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)
0.4
WNW
9
0.4
WNW
9
1.2
NW
6
0.7
W
9
0.6
W
9
0.8
NNW
7
0.6
W
9
0.7
W
10
0.7
W
9
0.8
W
9
1.1
W
8
1.1
W
8
0.9
W
9
0.9
W
8
0.8
W
8
0.6
W
7
0.8
NW
8
0.5
W
10
0.6
W
10
0.8
NW
9
0.5
W
10
Wave Graph
Metric surfscale
Energy kJ
26
26
112
73
60
61
61
89
81
101
167
141
117
109
82
39
93
51
71
97
46
Wind (km/h)
5
NNW
20
NW
5
NE
10
SSW
10
WNW
5
S
5
WSW
15
WNW
5
NE
10
S
15
SSW
5
SSE
5
W
10
WSW
10
N
15
NNW
25
NW
20
N
20
NNW
30
NNW
15
N
Wind State
cross-off
cross
off
cross-on
cross
cross-on
glassy
cross
glassy
cross-on
on
glassy
cross-on
cross-on
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
High Tide
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
8:01AM3.03m
8:22PM2.99m
9:00AM2.92m
9:28PM2.82m
Low Tide
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
2:06PM1.03m
2:36AM1.00m
3:12PM1.17m
3:46AM1.14m
clear
part cloud
clear
clear
clear
clear
part cloud
clear
part cloud
part cloud
part cloud
rain showers
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:28
6:28
6:28
6:30
6:31
6:31
6:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:54
8:52
8:52
8:51
8:50
8:49
8:47
 mm
2
Temp °C
21
21
20
22
22
18
21
21
18
22
23
21
23
23
20
22
21
18
25
24
22
Feels °C
20
20
21
23
22
20
21
21
19
21
23
23
23
23
21
20
18
16
21
20
19
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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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