Surf Forecasts:
Viana do Castelo surf forecast from 21 Jul 2026:
- Best quality surf: Saturday 25 Jul, 10PM (local time) - 7.5ft (2.3m), 8s period, NW swell with cross-offshore winds.
- Most powerful swell: Monday 27 Jul, 10PM (local time) - 7ft (2.1m), 9s period, NNW swell with 688 kJ wave energy.
- Next surfable swell (1★+): Tuesday 21 Jul, 4AM (local time) - 2ft (0.6m), 8s period with NNW 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 21) at 4AM. The primary swell is predicted to be 0.6m and 8s period with a secondary swell of 0.3m and 11s. 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 2.1m 9s and forecast to arrive on Monday (Jul 27) at 10PM. Winds are predicted to be 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 Sunday (Jul 26) at 7PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Tue 21st Jul) | 2ft (0.6m) 8s |
| Best Surf | 10PM (Sat 25th Jul) | 7.5ft (2.3m) 8s |
| Most Powerful | 10PM (Mon 27th Jul) | 7ft (2.1m) 9s |
Table - best surf conditions forecast for Viana do Castelo over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's take a look at what's cookin' for the next couple of weeks.
To be honest, it's a real slow start around here. We're looking at a solid eight-day stretch of tiny, weak waves and shifty wind. Nothing to get excited about until the 27th of July. That's a big gap to stare at, but hang tight, because there's a bright spot on the horizon.
For that whole first week, from the 21st right through to the 26th, it's all about waist-high slop and cross-onshore junk. Viana do Castelo is a river mouth, so it can be a fickle beast, and this period shows it. The combined energy is just a pittance (42-129), and the swell direction is all over the place. There is a moment on the morning of the 25th where it goes glassy, but the swell is only 4ft from the west, and the energy is still weak (116). It's surfable, but you'd be scraping for a 1-foot dribbler.
The real standout is Monday, the 27th of July.
That morning is the one to circle. The wind is light offshore from the north, and the swell jumps up to a clean 6ft from the NNW. The energy bumps up to a hefty 511, which is a solid jump. The period is a reasonable 10 seconds, so it'll have some push. The finder says "expect very good surf conditions," and I'm not gonna argue with that. If you can get out there for the dawn patrol, that's the best wave we'll see in the whole forecast. The afternoon looks a bit messier with a cross-shore wind picking up, so make it a morning mission.
After that, the swell hangs around but the wind gets tricky. The 28th still has some nice 5ft to 4ft NNW swell, but the wind turns cross-onshore, making it a bit bumpy. The 29th and 30th taper off, and by the 31st, we're back to tiny conditions.
The water temp is about average for this time of year, so no surprise there.
Looking into the second week, it's a mixed bag of lumpy, wind-affected swell from the NW. The 3rd of August brings a 4ft swell with moderate north wind, but it's a marginal call. Nothing that truly compares to that 27th morning.
So, in short: wait it out, save your energy, and be ready for the 27th. That's the day.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Tue morning, min 16°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Sun morning, min 16°C on Thu night). Winds increasing (calm on Thu night, fresh winds from the NNW by Sun afternoon). | ||||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | |||||||||||||||
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 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | NW 7 | NNW 7 | SW 4 | WSW 7 | W 7 | WNW 8 | NNW 7 | NNW 6 | WNW 9 | NNW 6 | NNW 10 | NNW 9 | NNW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 20 | 33 | 33 | 32 | 18 | 16 | 16 | 16 | 15 | 10 | 16 | 93 | 110 | 307 | 428 | 106 | 16 | 225 | 511 | 470 | 627 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | cross-on | cross-on | glassy | cross-on | cross-on | glassy | cross-on | on | cross | glassy | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off |
High Tide | 9:00AM2.76m | 9:14PM2.74m | 9:56AM2.64m | 10:14PM2.57m | 11:01AM2.58m | 11:26PM2.48m | 12:10PM2.60m | 00:40AM2.49m | 1:11PM2.69m | 1:41AM2.56m | 2:01PM2.82m | 2:28AM2.68m | 2:42PM2.96m | 3:07AM2.80m | |||||||
Low Tide | 2:59PM1.33m | 3:32AM1.26m | 4:03PM1.46m | 4:34AM1.39m | 5:18PM1.51m | 5:42AM1.44m | 6:32PM1.46m | 6:46AM1.41m | 7:30PM1.35m | 7:38AM1.32m | 8:17PM1.21m | 8:21AM1.21m | 8:56PM1.06m | ||||||||
 | |  | | | | | | |  | | | | | | | | | | | | |
 | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — |
 | — | — | 9:04 | — | — | 9:02 | — | — | 9:01 | — | — | 9:00 | — | — | 9:00 | — | — | 9:00 | — | 8:59 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 21 | 19 | 22 | 22 | 18 | 21 | 21 | 18 | 21 | 21 | 19 | 21 | 21 | 19 | 23 | 22 | 19 | 28 | 29 | 28 |
Feels °C | 23 | 21 | 20 | 22 | 22 | 19 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 19 | 17 | 19 | 19 | 17 | 27 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | NNW 7 | NNW 7 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NW 6 | NW 7 | NNW 7 | NNW 7 | WSW 7 | W 7 | — | — | WNW 9 | WNW 9 | NNW 11 | NNW 10 | — | NNW 9 |
| kJ | 17 | 17 | 15 | 14 | 15 | 15 | 15 | 9 | 14 | 10 | 9 | 93 | 110 | — | — | 16 | 16 | 49 | 511 | — | 627 |
Swell 2 Height (m) Direction Period (s) | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 8 | WNW 8 | NNW 7 | NNW 6 | — | — | NW 13 | NNW 12 | — | — | — | — |
| kJ | 20 | 33 | 33 | 32 | 18 | 16 | 16 | 16 | 15 | 7 | 7 | 9 | 4 | — | — | 7 | 14 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | WSW 7 | N 8 | SW 14 | SW 15 | SW 14 | SW 13 | SW 13 | NNW 8 | SW 4 | SW 12 | SW 11 | SW 11 | W 11 | — | — | — | — | — | — | — | — |
| kJ | 5 | 6 | 8 | 8 | 8 | 7 | 7 | 6 | 1 | 5 | 5 | 5 | 2 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | SW 4 | SW 4 | — | — | WNW 8 | NNW 7 | NNW 6 | NW 5 | NNW 6 | — | NNW 9 | — |
| kJ | — | — | — | — | — | — | — | — | — | 4 | 16 | — | — | 307 | 428 | 106 | 82 | 225 | — | 470 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 38 | 182 | 0 | 118 | 146 | 137 | 137 | 146 | 168 | 1164 | 106 | 10 | 0 | 100 | 179 | 416 | 251 | 19 | 0 | 258 | 0 |
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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