
Surf Forecasts:
Viana do Castelo surf forecast from 9 Jul 2026:
- Best quality surf: Friday 10 Jul, 1AM (local time) - 2.5ft (0.7m), 9s period, WNW swell with cross-offshore winds.
- Most powerful swell: Friday 10 Jul, 7AM (local time) - 2.5ft (0.8m), 9s period, WNW swell with 106 kJ wave energy.
- Next surfable swell (1★+): Friday 10 Jul, 1AM (local time) - 2.5ft (0.7m), 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 (Jul 10) at 1AM. The primary swell is predicted to be 0.7m and 9s period with a secondary swell of 0.4m and 5s. 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 0.8m 9s and forecast to arrive on Friday (Jul 10) at 7AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Friday (Jul 17) at 1AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Fri 10th Jul) | 2.5ft (0.7m) 9s |
| Best Surf | 1AM (Fri 10th Jul) | 2.5ft (0.7m) 9s |
| Most Powerful | 7AM (Fri 10th Jul) | 2.5ft (0.8m) 9s |
Table - best surf conditions forecast for Viana do Castelo over the next 16 days.
Alright folks, Rusty here. Let's have a proper look at what the next couple of weeks are shaping up like for Viana do Castelo.
Right off the bat, I gotta be straight with you – it’s a tough stretch. The first week and a half is pretty grim. We’re looking at a long, frustrating gap with hardly any surf worth paddling out for. The wait goes on until the morning of Monday the 21st of July before we finally see a proper window.
The Early Days (9th July – 20th July): A Washing Machine
For the first few days, the swell is tiny and weak. On Thursday the 9th, we’ve got a measly 2ft swell from the WNW with a period of 9 seconds, but the 9 mph cross-shore wind from the NW is ruining it. The combined energy is a pathetic 89, and the water is feeling a bit colder than normal at 61°F. It’s just not on.
Friday the 10th morning offers a brief moment of hope with glassy conditions and a 3ft swell (106 combined energy), but it’s so ordinary it’s not worth getting excited about. That afternoon, the wind swings back to cross-shore and kills it again.
Saturday the 11th morning is a similar story – glassy wind, but an even smaller 2ft swell. It’s surfable, but barely. After that, it’s a complete write-off. Sunday the 12th through to Sunday the 19th is a dead zone. There’s a bit of a swell spike on Saturday the 18th with a 7ft NW swell (407 combined energy), but it’s accompanied by a brutal 25 mph cross-offshore wind from the NNW. That’s a powerful, messy, expert-only situation if you’re brave enough, but honestly, that setup looks more interesting for kite surfing than paddle surfing. The same goes for Sunday the 19th with another 7ft NNW swell (601 combined energy) and 25 mph winds. It’s clean, but way too strong for a decent paddle.
The Only Standout: Monday 21st July Morning
Finally, a break in the clouds. The real standout, the only one worth circling in your calendar, is the morning of Monday the 21st of July. The wind is going to be a glorious offshore breeze from the NNE at only 6 mph. The swell is a solid 4ft from the NNW, with a combined energy of 212. It’s not a monster, but it’s a proper push. The forecast says "expect good surf conditions," and with that light offshore wind, the river mouth at *Viana do Castelo* should be clean and offering some fun, shaped waves. The swell direction matches the optimum (W) well enough, and the period is a short 8 seconds, so it won’t be overly powerful, just fun. Get on it early.
The Rest of the Second Week (21st July – 24th July)
After that Monday morning blast, it fades fast. The afternoon of the 21st gets messy with cross-shore wind. Tuesday the 22nd morning is glassy again but only 3ft, and then it’s back to tiny, weak waves and poor conditions for the rest of the week. The 24th brings a longer period groundswell (14 seconds) from the NW, but it’s only 1ft and the wind is onshore and choppy. A long period on a tiny wave is just a tease.
So, to sum it up: grit your teeth through the first stretch, and be ready for Monday the 21st of July. That’s your one shot.
Rusty.
Short Range ForecastMostly dry. Warm (max 21°C on Sat morning, min 14°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 22°C on Wed morning, min 16°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Thu 9 | Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 8 | NW 11 | NW 10 | NW 10 | NW 9 | NW 9 | NNW 9 | NW 8 | NW 8 | W 6 | W 6 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WSW 6 | W 9 |
Wave Graph | |||||||||||||||||||||
75 | 73 | 90 | 88 | 59 | 92 | 80 | 73 | 49 | 74 | 30 | 18 | 10 | 24 | 24 | 34 | 31 | 27 | 26 | 31 | 25 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | glassy | cross | cross-off | glassy | cross-on | cross-on | cross-on | on | cross | cross-on | on | glassy | glassy | cross-on | cross | cross-on | on | cross | cross-on |
High Tide | 11:11PM2.87m | 11:56AM3.00m | 00:26AM2.91m | 1:05PM3.14m | 1:37AM3.02m | 2:07PM3.31m | 2:38AM3.15m | 3:03PM3.47m | 3:34AM3.27m | 3:54PM3.58m | 4:24AM3.34m | 4:42PM3.63m | 5:11AM3.35m | ||||||||
Low Tide | 5:00PM1.16m | 5:32AM1.02m | 6:16PM1.07m | 6:42AM0.94m | 7:25PM0.91m | 7:45AM0.82m | 8:25PM0.73m | 8:42AM0.70m | 9:19PM0.57m | 9:33AM0.61m | 10:09PM0.46m | 10:22AM0.57m | 10:56PM0.42m | 11:08AM0.59m | |||||||
— | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | |
— | 9:10 | — | — | 9:10 | — | — | 9:09 | — | — | 9:09 | — | — | 9:08 | — | — | 9:08 | — | — | 9:07 | 9:07 | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 16 | 20 | 20 | 16 | 21 | 20 | 18 | 21 | 21 | 18 | 21 | 21 | 18 | 21 | 21 | 18 | 22 | 22 | 20 | 22 |
Feels °C | 16 | 16 | 19 | 19 | 15 | 21 | 20 | 20 | 19 | 20 | 19 | 20 | 20 | 20 | 21 | 21 | 19 | 20 | 20 | 21 | 22 |
Swell 1 Height (m) Direction Period (s) | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 8 | NW 11 | NW 10 | W 9 | NW 9 | NW 9 | NNW 9 | WSW 6 | W 5 | W 6 | W 6 | W 6 | W 6 | WNW 9 | W 6 | WSW 6 | WSW 6 |
75 | 73 | 90 | 88 | 59 | 92 | 80 | 52 | 49 | 74 | 30 | 12 | 5 | 24 | 24 | 16 | 17 | 27 | 15 | 31 | 25 | |
Swell 2 Height (m) Direction Period (s) | S 17 | NW 5 | NW 5 | NW 13 | NW 12 | WNW 9 | W 9 | NW 10 | W 8 | WSW 7 | WSW 7 | NW 8 | WNW 8 | NNW 8 | WNW 11 | WNW 10 | WNW 10 | W 6 | WNW 9 | W 8 | W 9 |
6 | 6 | 5 | 7 | 50 | 44 | 57 | 73 | 28 | 9 | 17 | 18 | 6 | 6 | 23 | 34 | 31 | 11 | 26 | 22 | 25 | |
Swell 3 Height (m) Direction Period (s) | — | SW 16 | SW 17 | SW 17 | SW 17 | NW 3 | NW 4 | NW 4 | SW 15 | W 8 | NW 8 | NNW 7 | NW 8 | W 12 | NNW 8 | WNW 7 | N 6 | SW 14 | SW 15 | SW 15 | SW 13 |
— | 10 | 11 | 11 | 11 | 2 | 2 | 3 | 8 | 5 | 17 | 5 | 10 | 11 | 6 | 9 | 1 | 8 | 8 | 8 | 6 | |
Wind waves Height (m) Direction Period (s) | NW 5 | — | — | NW 5 | NW 3 | — | NW 4 | — | SSW 3 | SW 3 | — | S 2 | SW 4 | — | — | — | — | S 3 | SSW 4 | — | — |
8 | — | — | 4 | 4 | — | 3 | — | 1 | 3 | — | 1 | 3 | — | — | — | — | 4 | 13 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 100 | 0 | 0 | 100 | 0 | 0 | 104 | 81 | 18 | 106 | 5 | 165 | 106 | 0 | 0 | 104 | 5 | 137 | 104 | 4 | 71 |
Best forecast wave conditions in Douro and Minho | |||||||||||||||||||||
Best forecast wave conditions in Portugal | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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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.











