Surf Forecasts:
Viana do Castelo surf forecast from 13 Jul 2026:
- Best quality surf: Saturday 18 Jul, 10PM (local time) - 5ft (1.6m), 7s period, NNW swell with cross-offshore winds.
- Most powerful swell: Saturday 18 Jul, 10PM (local time) - 5ft (1.6m), 7s period, NNW swell with 229 kJ wave energy.
- Next surfable swell (1★+): Tuesday 14 Jul, 4AM (local time) - 2.5ft (0.7m), 6s period with WSW 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 Tuesday (Jul 14) at 4AM. The primary swell is predicted to be 0.7m and 6s period with a secondary swell of 0.3m and 11s. 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 1.6m 7s and forecast to arrive on Saturday (Jul 18) at 10PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Saturday (Jul 18) at 7PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Tue 14th Jul) | 2.5ft (0.7m) 6s |
| Best Surf | 10PM (Sat 18th Jul) | 5ft (1.6m) 7s |
| Most Powerful | 10PM (Sat 18th Jul) | 5ft (1.6m) 7s |
Table - best surf conditions forecast for Viana do Castelo over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what's on the cards for our local stretch.
Honestly, the next week and a half is looking pretty flat and small. We’ve got a long, slow start with almost nothing worth paddling out for. The first real inkling of any decent surf doesn't show up until the morning of Sunday, July 19th, and even then, it’s a bit of a tease. The water is sitting at a bit cooler than average for the time of year, coming in at 62°F.
For the most part, we’re looking at weak, short-period slop. The combined swell energy is in the doldrums, with readings like 46 and 65, which is just weak sauce. The winds are mostly cross-on or light, keeping things messy. You’ll be fighting chop for barely a 1ft wave.
The one blip on the radar comes on Sunday morning, July 19th. The swell picks up slightly to 3ft from the NNW, with a combined energy of (111) – that’s moderate, but still nothing to write home about. The real kicker is the glassy conditions with a 3 mph west wind. That’s the cleanest window in the whole period, but the wave is still just ordinary. The period is a short 7 seconds, so don't expect any real push.
Moving into the last week of July, we get a bit more size. The morning of Monday, July 27th, is the one to circle. The swell bumps up to 5ft from the NW, with a combined energy of (247). The wind goes glassy, and the surf report says to expect good conditions. That’s a solid, clean option for a Monday morning session. Post that, the 28th still has a clean 3ft from the NW on the morning glass-off, but it’s not as punchy.
For the break itself, Viana do Castelo is a river mouth setup, fairly consistent, and exposed to the west. It can get crowded often, so don't be surprised if you’ve got company, especially on that clean Sunday morning. The swell direction is a close match to the optimum W, which is a bonus.
The very end of the window, on the 26th, sees a jump in size to 5ft and 6ft from the NW, but the wind is onshore or cross-on, making it a choppy mess. The combined energy (242-340) is moderate, but with that wind, it’s a no-go for a paddle. That setup, being a beach and river mouth, would be far more interesting for a kite surfer than a traditional surfer.
So, the pick of the litter is the morning of Monday, July 27th. Keep your eyes peeled for that one.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Mon afternoon, min 17°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Sat afternoon, min 17°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Mon 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | |||||||||||||||
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) | NW 8 | WSW 6 | WNW 11 | WNW 10 | W 10 | W 9 | W 9 | W 8 | WNW 9 | WNW 9 | W 8 | W 8 | W 8 | WNW 8 | WNW 8 | WNW 8 | NNW 7 | NNW 7 | NNW 8 | NNW 8 | NW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 17 | 35 | 40 | 33 | 46 | 40 | 71 | 21 | 27 | 26 | 22 | 21 | 12 | 13 | 13 | 13 | 209 | 96 | 72 | 43 | 16 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | on | cross-on | glassy | cross-on | cross-on | glassy | cross-on | on | glassy | glassy | cross | cross-off | cross-off | cross | cross | glassy | cross | cross-off | glassy |
High Tide | 3:34AM3.27m | 3:54PM3.58m | 4:24AM3.34m | 4:42PM3.63m | 5:11AM3.35m | 5:27PM3.61m | 5:57AM3.30m | 6:11PM3.51m | 6:41AM3.20m | 6:55PM3.36m | 7:25AM3.06m | 7:38PM3.16m | 8:11AM2.90m | ||||||||
Low Tide | 9:19PM0.57m | 9:33AM0.61m | 10:09PM0.46m | 10:22AM0.57m | 10:56PM0.42m | 11:08AM0.59m | 11:41PM0.46m | 11:52AM0.67m | 00:25AM0.56m | 12:36PM0.80m | 1:09AM0.72m | 1:20PM0.97m | 1:53AM0.90m | ||||||||
 |  | | |  |  | |  | | | | | | | | | | | | | | |
 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 |
 | — | 9:08 | — | — | 9:08 | — | — | 9:07 | — | — | 9:07 | — | — | 9:07 | — | — | 9:06 | — | — | 9:05 | 9:05 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 19 | 22 | 22 | 19 | 21 | 21 | 18 | 21 | 21 | 19 | 22 | 21 | 19 | 27 | 28 | 26 | 26 | 26 | 23 | 31 |
Feels °C | 20 | 19 | 21 | 22 | 20 | 21 | 21 | 19 | 21 | 21 | 21 | 20 | 19 | 18 | 25 | 25 | 25 | 25 | 26 | 24 | 28 |
Swell 1 Height (m) Direction Period (s) | W 5 | WSW 6 | W 6 | W 6 | W 10 | W 6 | W 9 | WSW 6 | WNW 9 | WNW 9 | W 8 | W 8 | W 8 | WNW 8 | WNW 8 | WNW 8 | NNW 10 | NNW 7 | NNW 8 | NNW 8 | NW 6 |
| kJ | 9 | 35 | 15 | 15 | 46 | 16 | 71 | 10 | 27 | 26 | 22 | 21 | 12 | 13 | 13 | 13 | 10 | 96 | 72 | 43 | 16 |
Swell 2 Height (m) Direction Period (s) | NW 8 | NNW 8 | WNW 11 | WNW 10 | W 5 | W 9 | NW 6 | W 8 | WSW 5 | WSW 5 | WSW 5 | WSW 4 | WSW 4 | SW 6 | SW 5 | NW 11 | SW 19 | NW 9 | W 9 | W 8 | NNW 8 |
| kJ | 17 | 12 | 40 | 33 | 15 | 40 | 1 | 21 | 9 | 8 | 4 | 4 | 2 | 1 | 1 | 5 | 15 | 13 | 6 | 5 | 12 |
Swell 3 Height (m) Direction Period (s) | WNW 8 | WNW 12 | WNW 7 | WNW 7 | NNW 7 | NNW 6 | SW 15 | W 10 | SW 12 | SW 13 | S 11 | NW 5 | W 6 | — | N 12 | W 6 | — | W 10 | S 18 | W 13 | W 8 |
| kJ | 6 | 28 | 10 | 5 | 4 | 4 | 8 | 17 | 6 | 7 | 2 | 1 | 1 | — | 3 | 1 | — | 2 | 6 | 3 | 5 |
Wind waves Height (m) Direction Period (s) | SSW 4 | — | — | — | — | — | — | — | — | — | — | — | NW 2 | NNW 4 | NNW 4 | NW 5 | NNW 7 | — | — | — | — |
| kJ | 14 | — | — | — | — | — | — | — | — | — | — | — | 1 | 21 | 23 | 47 | 209 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 106 | 5 | 19 | 106 | 0 | 104 | 104 | 0 | 106 | 615 | 733 | 869 | 1491 | 38 | 118 | 130 | 2 | 0 | 258 | 0 | 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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