Viana do Castelo Surf Break

Lat Long: 41.69° N 8.85° W

Viana do Castelo Surf Forecast and Surf Report

Issued: 12 pm 13 Aug 2026 (local time)

Forecast update in  hr  min

Today's Viana do Castelo sea temperature is
19.7° C
0.6° 

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 13 Aug 2026:

  • Best quality surf: Saturday 15 Aug, 7AM (local time) - 7ft (2.1m), 8s period, NW swell with cross-offshore winds.
  • Most powerful swell: Saturday 15 Aug, 7PM (local time) - 10ft (3.0m), 8s period, NNW swell with 874 kJ wave energy.
  • Next surfable swell (1★+): Friday 14 Aug, 1AM (local time) - 3ft (0.9m), 9s 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 14) at 1AM. The primary swell is predicted to be 0.9m and 9s period. 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 3.0m 8s and forecast to arrive on Saturday (Aug 15) 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 1.3m 6s period and expected on Friday (Aug 14) at 4PM.

Wave TypeTime (WEST) & Date Wave Height & Period
Next good surf (1 star+) 1AM (Fri 14th Aug)3ft (0.9m) 9s
Best Surf 7AM (Sat 15th Aug)7ft (2.1m) 8s
Most Powerful 7PM (Sat 15th Aug)10ft (3.0m) 8s

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


The Lowdown

Alright, Rusty here again, givin' it to you in feet and miles per hour.

We're lookin' at Viana do Castelo, a river mouth setup. Water temp is about 68°F, right where it should be for this time of year. The pattern is a slow burner.

Thursday the 13th starts weak. We got a 4ft W swell with a 10-second period, but a light cross-on breeze messes it up. The wave energy is weak, don't even bother. Thursday afternoon is even worse with a cross-shore chop.

Friday the 14th morning cleans up with a light cross-off wind, but the swell drops to 3ft from the WNW, period at 9 seconds, and energy is just moderate. Surfable, but ho-hum.

Now, Saturday the 15th morning pumps up to 7ft from the NW, but with a short 8-second period. The energy is getting there (moderate), and the wind is clean. But the warning is loud and clear: this is too big for this break. Over 7ft is expert-only territory, and the short period will make it dumpy. Afternoon gets bigger and windier, a no-go.

Sunday the 16th morning is your best early bet: 5ft from the NNW, short period, but light cross-off wind means clean waves. This is a fun size for most surfers. The afternoon gets blown out again.

Then we hit a real flat patch from the 19th to the 22nd. The second week's highlight is Monday the 24th morning. We get a clean 5ft NW swell, 8-second period, moderate energy, and light cross-off wind. That’s the session to aim for.

Finally, on Friday the 28th morning, we get glassy conditions with a 3ft WNW swell, a longer 11-second period, and moderate energy. The glassy wind is a big plus for the river mouth.

The pick of the whole run is Sunday the 16th morning and Monday the 24th morning. Clean, good size for the spot, and manageable. The rest is pretty patchy. Don’t plan a trip around it, but you’ll find a couple windows.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 27°C on Sat afternoon, min 18°C on Thu night). Winds increasing (light winds from the W on Thu morning, strong winds from the NNW by Sat afternoon).

Days 4-6 Weather Summary

Mostly dry. Warm (max 33°C on Tue afternoon, min 20°C on Sun night). Winds increasing (light winds from the N on Sun morning, fresh winds from the NNW by Mon afternoon).

Thursday
13
Friday
14
Saturday
15
Sunday
16
Monday
17
Tuesday
18
Wednesday
19
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
1
0
0
!
0
1
2
1
2
1
0
1
1
0
1
1
0
0
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
10
1.1
WNW
10
0.9
WNW
9
0.9
WNW
9
0.8
WNW
9
2
NNW
7
2.1
NW
8
2.5
NNW
8
2
NNW
8
1.3
NNW
7
1.4
NNW
8
1.8
NNW
8
1.1
NNW
8
1
NNW
8
1.3
NNW
8
0.7
NNW
6
0.7
NNW
8
0.7
NNW
8
0.7
NW
6
0.9
NNW
7
1.9
NNW
7
Wave Graph
Metric surfscale
Energy kJ
250
250
153
116
90
372
532
750
441
183
213
392
157
133
226
28
55
51
32
93
335
Wind (km/h)
5
W
20
NW
10
N
10
NNW
25
NNW
25
N
20
N
40
NNW
20
N
10
N
25
NNW
15
N
10
N
25
NNW
20
NNE
10
N
20
NW
10
NE
10
N
25
NNW
30
N
Wind State
cross-on
cross
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross-off
cross
off
cross-off
cross-off
cross-off
High Tide
4:25PM3.65m
4:51AM3.42m
5:05PM3.63m
5:30AM3.39m
5:43PM3.54m
6:07AM3.29m
6:19PM3.37m
6:43AM3.15m
6:55PM3.16m
7:20AM2.98m
7:33PM2.93m
8:00AM2.80m
8:16PM2.69m
Low Tide
10:08AM0.55m
10:37PM0.39m
10:48AM0.53m
11:16PM0.42m
11:26AM0.60m
11:52PM0.52m
12:03PM0.72m
00:28AM0.68m
12:40PM0.89m
1:03AM0.88m
1:18PM1.08m
1:40AM1.10m
2:01PM1.29m
2:23AM1.32m
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:41
6:41
6:43
6:43
6:45
6:46
6:47
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:37
8:37
8:36
8:34
8:32
8:30
8:30
 mm
Temp °C
22
23
20
24
24
22
26
27
22
27
27
23
30
32
27
32
33
29
29
29
23
Feels °C
23
23
21
23
22
20
22
22
20
25
25
20
28
28
22
30
30
26
26
26
19
  • 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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