
Surf Forecasts:
Viana do Castelo surf forecast from 17 Jul 2026:
- Best quality surf: Sunday 19 Jul, 1AM (local time) - 3.5ft (1.1m), 6s period, NW swell with glassy winds.
- Most powerful swell: Sunday 19 Jul, 1AM (local time) - 3.5ft (1.1m), 6s period, NW swell with 72 kJ wave energy.
- Next surfable swell (1★+): Sunday 19 Jul, 1AM (local time) - 3.5ft (1.1m), 6s 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 Sunday (Jul 19) at 1AM. The primary swell is predicted to be 1.1m and 6s period with a secondary swell of 0.4m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Viana do Castelo in the next 16 days are 1.1m 6s and forecast to arrive on Sunday (Jul 19) at 1AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Saturday (Jul 18) at 10PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sun 19th Jul) | 3.5ft (1.1m) 6s |
| Best Surf | 1AM (Sun 19th Jul) | 3.5ft (1.1m) 6s |
| Most Powerful | 1AM (Sun 19th Jul) | 3.5ft (1.1m) 6s |
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 happening at Viana do Castelo over the next couple of weeks. It's a river break, usually pretty consistent, gets best swell from the west, and it can get packed. But this forecast starts slow – a real dry spell.
From 17 July right through to the morning of 21 July, there's nothing worth paddling out for. Tiny 1-foot dribble with cross or onshore breezes. Water temp is 64°, about average for this time of year.
On 21 July morning, we finally get a little pulse: 1-foot waves from the WNW, glassy conditions, period 10 seconds. Energy is low (43), so it's surfable but very ordinary. Same on 22 July morning – glassy, 1-foot, 10s period, energy 41. Just enough to get wet but not much else.
The next few days stay flat or junk until the morning of 27 July. That morning we see 4-foot swell from the NNW, period 10s, with a clean cross-off wind. Energy jumps to 323 – moderate power. Still, the direction isn't ideal for this break, but it's rideable.
Now the real standout – Tuesday morning, 28 July. Swell hits 6 feet from the NNW, period 9s, light cross-off breeze. Energy is 457 – solid grunt. Waves should be clean and have enough size for experienced surfers. But watch out – this spot is often crowded, so expect a pack.
The afternoon of 28 July jumps to 8 feet from the NNW – too big for this river break unless you're an expert and don't mind it closing out. Same on 29 July: 7 feet morning, 7 feet afternoon, both too big.
Then Friday morning, 31 July is another good call. Swell drops back to a nicer 6 feet from the NNW, period 7s, and it's glassy – dead calm. Energy 277, still solid. Clean, manageable, and a great option if you can handle the crowds.
After that, 1 August morning offers 4-foot swell but very ordinary conditions – not worth the drive.
Overall, aim for the morning of 28 July or the morning of 31 July. Both give clean, moderate-sized surf with decent energy. Everything else is small, weak, or too big. This break really needs a proper west swell to fire, and we're not getting that in this window. But those two mornings are worth chasing.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Sun morning, min 16°C on Sun night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 23°C on Tue morning, min 17°C on Mon night). Wind will be generally light. | |||||||||||||||||||
Fri 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | ||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map | ||||||||||||||||||||
Wave Height (m) Direction Period (s) | WNW 8 | WNW 8 | WNW 8 | WNW 8 | NW 6 | NW 5 | NW 9 | NNW 7 | NNW 7 | NW 7 | NNW 7 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | NW 8 | NW 7 |
Wave Graph | ||||||||||||||||||||
13 | 13 | 13 | 13 | 72 | 14 | 14 | 31 | 32 | 56 | 37 | 20 | 33 | 33 | 19 | 18 | 16 | 16 | 16 | 14 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | off | glassy | cross | glassy | cross-on | on | cross | cross-on | cross-on | glassy | glassy | cross | glassy | glassy | cross | glassy | glassy | cross-on | glassy |
High Tide | 6:11PM3.51m | 6:41AM3.20m | 6:55PM3.36m | 7:25AM3.06m | 7:38PM3.16m | 8:11AM2.90m | 8:23PM2.95m | 9:00AM2.76m | 9:14PM2.74m | 9:56AM2.64m | 10:14PM2.57m | 11:01AM2.58m | 11:26PM2.48m | |||||||
Low Tide | 00:25AM0.56m | 12:36PM0.80m | 1:09AM0.72m | 1:20PM0.97m | 1:53AM0.90m | 2:06PM1.16m | 2:39AM1.09m | 2:59PM1.33m | 3:32AM1.26m | 4:03PM1.46m | 4:34AM1.39m | 5:18PM1.51m | ||||||||
— | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — | |
— | 9:07 | — | — | 9:06 | — | — | 9:05 | — | — | 9:05 | — | — | 9:04 | — | — | 9:02 | — | — | 9:01 | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 18 | 21 | 21 | 18 | 22 | 22 | 18 | 22 | 22 | 18 | 23 | 22 | 18 | 22 | 22 | 18 | 22 | 21 | 18 |
Feels °C | 20 | 17 | 21 | 20 | 19 | 22 | 22 | 20 | 21 | 23 | 20 | 23 | 22 | 19 | 22 | 22 | 19 | 22 | 21 | 19 |
Swell 1 Height (m) Direction Period (s) | WNW 8 | NW 4 | NNW 4 | WNW 8 | NW 6 | NW 5 | NW 4 | NNW 7 | NNW 7 | NW 7 | NNW 7 | NNW 7 | NW 6 | NNW 6 | NNW 6 | NW 6 | NW 6 | NW 6 | NW 8 | NW 7 |
13 | 5 | 7 | 13 | 72 | 14 | 5 | 31 | 32 | 56 | 37 | 17 | 11 | 15 | 14 | 9 | 10 | 10 | 14 | 13 | |
Swell 2 Height (m) Direction Period (s) | WSW 4 | WNW 8 | WNW 8 | SW 5 | WNW 8 | WNW 8 | NW 9 | NW 8 | W 8 | W 8 | WNW 11 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | W 9 |
2 | 13 | 13 | 1 | 19 | 11 | 12 | 17 | 12 | 10 | 23 | 20 | 33 | 33 | 19 | 18 | 16 | 16 | 16 | 14 | |
Swell 3 Height (m) Direction Period (s) | SW 12 | SW 4 | SW 6 | NW 11 | NW 10 | NNW 9 | W 9 | W 8 | WNW 12 | WNW 11 | W 7 | N 9 | N 8 | N 9 | SW 15 | SW 14 | SW 13 | N 8 | SW 13 | SW 12 |
5 | 1 | 1 | 5 | 4 | 8 | 14 | 12 | 15 | 12 | 4 | 6 | 6 | 2 | 8 | 8 | 7 | 5 | 7 | 6 | |
Wind waves Height (m) Direction Period (s) | NW 2 | N 4 | — | NW 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1 | 3 | — | 10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 1328 | 1164 | 756 | 1236 | 0 | 114 | 146 | 10 | 10 | 151 | 0 | 0 | 258 | 0 | 0 | 258 | 258 | 336 | 146 | 19 |
Best forecast wave conditions in Douro and Minho | ||||||||||||||||||||
Best forecast wave conditions in Portugal | ||||||||||||||||||||
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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.










