Surf Forecasts:
Viana do Castelo surf forecast from 25 Jul 2026:
- Best quality surf: Monday 27 Jul, 1AM (local time) - 4.5ft (1.3m), 6s period, NNW swell with cross-offshore winds.
- Most powerful swell: Monday 27 Jul, 7AM (local time) - 4.5ft (1.3m), 11s period, NNW swell with 346 kJ wave energy.
- Next surfable swell (1★+): Saturday 25 Jul, 10AM (local time) - 3.5ft (1.0m), 6s 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 Saturday (Jul 25) at 10AM. The primary swell is predicted to be 1.0m and 6s period with a secondary swell of 0.2m and 8s. 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 1.3m 11s and forecast to arrive on Monday (Jul 27) at 7AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 6s period and expected on Sunday (Jul 26) at 7PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Sat 25th Jul) | 3.5ft (1.0m) 6s |
| Best Surf | 1AM (Mon 27th Jul) | 4.5ft (1.3m) 6s |
| Most Powerful | 7AM (Mon 27th Jul) | 4.5ft (1.3m) 11s |
Table - best surf conditions forecast for Viana do Castelo over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down what’s coming our way.
So, the first bit of this forecast is a bit of a slow burn. We’ve got a few days of ankle-biters and cross-off winds that aren’t doing the waves any favours. The energy is low, barely registering on the 25th. You’d be better off on the sand.
Then, Monday the 27th morning, it finally clicks. The wind goes dead glassy, and we get a clean little pulse from the NNW. The swell is a tidy 4ft with a 10-second period, and the energy kicks up to solid. That’s the first real highlight.
The best bet is Viana do Castelo (river) for that Monday morning session. The NNW swell is hitting the exposed banks, and with the glass-off, it’ll be beautifully clean. It’s a fairly consistent spot, but it gets busy, so plan to be there early. The 4ft is perfect for a beginner, but there’s enough push to keep a longboarder happy.
The period is a solid 10 seconds, so you’ll get some nice, formed lines, though it might be a bit straight on the sandbanks. The river setup handles that longer period better than a straight beach.
After that, the wind turns messy for a few days with cross-onshore junk. There’s a brief window on the morning of Thursday the 30th with glassy conditions, but the swell is tiny at 2ft. Not worth the paddle.
Skip ahead to Sunday the 2nd of August. That’s another glassy morning, with a solid 5ft from the NNW. The energy is pumping. The period is 8 seconds, so it’s a windswell, but on a glassy day at the river, it’ll still be a blast. The 5ft is starting to get a little chunky for a total beginner, but it’s a great size for a confident intermediate.
The following week is mostly flat or wind-affected. A few mornings with glassy conditions, like Monday the 4th, but the swell is tiny. The long-range for the 9th of August shows a 4ft WNW swell, but the wind is light cross-onshore, making it a bit of a gamble. Promising, but not a sure thing.
Overall, the best on offer is Monday the 27th morning and Sunday the 2nd of August morning at Viana do Castelo. The rest of the run is mostly quiet, so pick your moments.
Stay stoked,
Rusty
Short Range ForecastMostly dry. Warm (max 30°C on Mon morning, min 15°C on Sat night). Winds decreasing (fresh winds from the NNW on Sat afternoon, calm by Mon morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Tue morning, min 17°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | |||||||||||||||
AM | 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 6 | NW 6 | NNW 6 | WNW 9 | WNW 9 | NNW 6 | NNW 10 | NNW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | WNW 8 | WNW 10 | NW 8 | WNW 8 | WNW 9 | WNW 9 | WNW 8 | WNW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 71 | 107 | 213 | 16 | 27 | 123 | 314 | 314 | 292 | 208 | 196 | 112 | 88 | 48 | 55 | 53 | 46 | 30 | 26 | 51 | 20 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | glassy | cross | glassy | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | on | cross-on | cross-off | cross-off | cross | cross-off |
High Tide | 1:11PM2.69m | 1:41AM2.56m | 2:01PM2.82m | 2:28AM2.68m | 2:42PM2.96m | 3:07AM2.80m | 3:19PM3.10m | 3:41AM2.92m | 3:52PM3.23m | 4:14AM3.02m | 4:25PM3.32m | 4:46AM3.11m | 4:57PM3.39m | ||||||||
Low Tide | 7:30PM1.35m | 7:38AM1.32m | 8:17PM1.21m | 8:21AM1.21m | 8:56PM1.06m | 8:59AM1.08m | 9:31PM0.93m | 9:34AM0.95m | 10:03PM0.81m | 10:07AM0.85m | 10:35PM0.72m | 10:40AM0.77m | 11:08PM0.66m | ||||||||
 | |  | | | | | | | | | | | |  |  | | |  | | | |
 | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — | 6:26 | — | — | 6:28 | — | — |
 | — | — | 9:00 | — | — | 9:00 | — | 8:59 | — | — | 8:58 | — | — | 8:57 | — | — | 8:55 | — | — | 8:54 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 18 | 23 | 22 | 22 | 30 | 28 | 26 | 25 | 24 | 18 | 22 | 22 | 19 | 23 | 23 | 20 | 23 | 22 | 18 |
Feels °C | 19 | 18 | 14 | 18 | 18 | 20 | 29 | 26 | 25 | 25 | 25 | 19 | 21 | 21 | 19 | 23 | 23 | 20 | 22 | 23 | 19 |
Swell 1 Height (m) Direction Period (s) | WNW 6 | NW 10 | WNW 10 | WNW 9 | WNW 9 | NW 12 | NNW 10 | NNW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | WNW 8 | NW 4 | NW 8 | WNW 8 | NNW 6 | NW 7 | WNW 8 | WNW 7 |
| kJ | 71 | 4 | 9 | 16 | 27 | 68 | 314 | 314 | 292 | 208 | 196 | 112 | 88 | 48 | 8 | 53 | 46 | 22 | 26 | 51 | 20 |
Swell 2 Height (m) Direction Period (s) | W 8 | — | — | NW 13 | NW 13 | WNW 9 | WNW 9 | WNW 9 | WNW 8 | W 8 | W 8 | WNW 11 | WNW 11 | NW 8 | NW 8 | WNW 10 | NNW 5 | WNW 9 | WNW 9 | N 12 | NW 4 |
| kJ | 5 | — | — | 7 | 7 | 25 | 26 | 26 | 13 | 5 | 5 | 11 | 12 | 18 | 33 | 36 | 11 | 30 | 25 | 3 | 4 |
Swell 3 Height (m) Direction Period (s) | W 11 | — | — | — | — | — | — | — | S 14 | — | — | — | — | WNW 10 | WNW 10 | N 10 | N 9 | NNW 8 | — | N 12 | NNW 11 |
| kJ | 2 | — | — | — | — | — | — | — | 4 | — | — | — | — | 20 | 55 | 2 | 2 | 6 | — | 3 | 12 |
Wind waves Height (m) Direction Period (s) | — | NW 6 | NNW 6 | NNW 6 | NNW 5 | NNW 6 | — | — | — | — | — | — | — | NW 2 | — | — | — | — | — | — | — |
| kJ | — | 107 | 213 | 60 | 69 | 123 | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 1175 | 146 | 19 | 329 | 0 | 0 | 130 | 0 | 56 | 104 | 0 | 0 | 14 | 0 | 104 | 205 | 0 | 0 | 324 | 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.
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