Surf Forecasts:
Viana do Castelo surf forecast from 10 Jul 2026:
- Best quality surf: Friday 10 Jul, 10PM (local time) - 2.5ft (0.7m), 8s period, WNW swell with cross-offshore winds.
- Most powerful swell: Saturday 11 Jul, 10AM (local time) - 2ft (0.6m), 11s period, NW swell with 92 kJ wave energy.
- Next surfable swell (1★+): Friday 10 Jul, 10PM (local time) - 2.5ft (0.7m), 8s 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 10PM. The primary swell is predicted to be 0.7m and 8s period with a secondary swell of 0.4m and 12s. Another secondary swell of 0.4m and 3s is also forecast. 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 0.6m 11s and forecast to arrive on Saturday (Jul 11) at 10AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.1m 5s period and expected on Friday (Jul 10) at 7PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Fri 10th Jul) | 2.5ft (0.7m) 8s |
| Best Surf | 10PM (Fri 10th Jul) | 2.5ft (0.7m) 8s |
| Most Powerful | 10AM (Sat 11th Jul) | 2ft (0.6m) 11s |
Table - best surf conditions forecast for Viana do Castelo over the next 16 days.
Alright folks, Rusty here. Let’s get into it.
Well, I gotta be straight with you – the next 16 days are looking pretty flat and bleak for the most part. We’ve got a long stretch of weak, choppy, and messy surf ahead for Viana do Castelo. The first real recommendation doesn’t even pop up until Saturday the 11th, and even then, it’s nothing to write home about.
The early part of the window is a write-off. From Friday the 10th through to the end of the week, we’re looking at small, weak swells with poor conditions. The combined energy is barely registering, mostly in the 30s to 50s (weak). Winds are cross or onshore, keeping things choppy and uninviting. This is a gap of several days with no real surf on offer.
The best chance for a paddle comes early on Saturday morning, July 11th. The swell is a modest 2ft from the NW, but the period stretches to 11 seconds, suggesting a bit of groundswell. The real kicker is the glassy offshore wind (WSW at 3 mph). That’s as clean as it gets, and the river mouth setup here can handle a longer period swell. It’s a beginner-friendly break, so the small size is perfect for learning. The water temp is about average for the time of year. The combined energy is a moderate 163 – not a lot of punch, but with those clean conditions, it’s the best we’ve got.
Sunday morning the 12th is a step down; the wind swings cross-onshore, and the swell drops to 2ft with a shorter period. Not worth it.
Looking further ahead, there’s a glimmer on the morning of Monday, July 20th. The swell picks up to 4ft from the NNW, and it’s glassy again (WNW at 3 mph). The combined energy hits 182 (moderate), and the 8-second period is a bit windswell-ish, but with those clean conditions, it’s surfable. However, the following afternoon sees a strong 19 mph cross-offshore wind, which will blow the tops off.
Then on Saturday, July 25th, there’s a pulse of more energy. The swell is 4ft from the NW, with a combined energy of 256 (moderate). The wind is a clean cross-offshore (NNW at 13 mph). That’s a promising signal, but it’s a long way out, so treat it as a hopeful possibility rather than a guarantee.
So, the standout is the glassy Saturday morning on July 11th. It’s not big, but it’s clean. The Saturday on July 25th is the one to watch for a bit more size, but it’s a gamble this far out. For the rest… well, the board might stay in the car.
Rusty.
Short Range ForecastMostly dry. Warm (max 21°C on Sat morning, min 14°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 22°C on Wed morning, min 16°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | |||||||||||||||
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 9 | WNW 9 | WNW 8 | NW 11 | NW 10 | NW 10 | NW 9 | NW 8 | NNW 8 | NNW 8 | NW 8 | WNW 7 | WNW 11 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | W 10 | W 9 | W 9 | W 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 90 | 88 | 59 | 92 | 80 | 73 | 64 | 58 | 45 | 27 | 17 | 11 | 40 | 33 | 31 | 27 | 25 | 17 | 25 | 25 | 22 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | glassy | on | cross-on | cross-on | on | cross | cross-on | on | glassy | cross-on | on | cross | cross-on | on | cross | cross-on | cross-on | cross-off |
High Tide | 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 | 5:27PM3.61m | ||||||||
Low Tide | 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 | 11:41PM0.46m | |||||||
 | |  |  | | | | |  | | | | | | | | | | | | | |
 | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — |
 | — | — | 9:10 | — | — | 9:09 | — | — | 9:09 | — | — | 9:08 | — | — | 9:08 | — | — | 9:07 | — | — | 9:07 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 19 | 16 | 21 | 20 | 18 | 20 | 21 | 18 | 21 | 21 | 18 | 21 | 21 | 19 | 22 | 22 | 19 | 22 | 21 | 18 |
Feels °C | 19 | 18 | 15 | 20 | 20 | 19 | 18 | 19 | 18 | 20 | 21 | 20 | 20 | 20 | 20 | 21 | 21 | 19 | 21 | 20 | 18 |
Swell 1 Height (m) Direction Period (s) | WNW 9 | WNW 9 | WNW 8 | WNW 9 | NW 10 | NW 10 | NW 9 | NW 8 | NNW 8 | W 6 | NW 8 | WSW 5 | W 5 | W 6 | W 6 | W 6 | W 6 | W 6 | W 9 | W 9 | W 5 |
| kJ | 90 | 88 | 59 | 61 | 80 | 73 | 64 | 58 | 45 | 18 | 17 | 8 | 14 | 15 | 17 | 16 | 16 | 10 | 25 | 25 | 13 |
Swell 2 Height (m) Direction Period (s) | NNW 5 | NW 13 | NW 12 | NW 11 | W 9 | W 9 | W 8 | WSW 7 | WSW 6 | NNW 8 | WNW 8 | WNW 7 | WNW 11 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | W 8 | W 5 | SW 13 | W 8 |
| kJ | 3 | 7 | 50 | 92 | 57 | 55 | 31 | 16 | 28 | 27 | 6 | 11 | 40 | 33 | 31 | 27 | 25 | 12 | 8 | 7 | 22 |
Swell 3 Height (m) Direction Period (s) | — | SW 17 | SW 17 | SW 16 | NW 4 | NW 4 | SW 15 | SW 19 | WNW 8 | WNW 8 | WSW 6 | NNW 8 | WNW 7 | WNW 7 | NNW 7 | SW 14 | SW 15 | W 10 | SW 13 | — | SW 13 |
| kJ | — | 11 | 11 | 10 | 2 | 5 | 8 | 15 | 6 | 6 | 4 | 6 | 5 | 5 | 4 | 8 | 8 | 17 | 6 | — | 7 |
Wind waves Height (m) Direction Period (s) | — | NW 5 | NW 3 | — | — | SSE 2 | S 3 | SSW 4 | — | — | SW 4 | — | — | — | — | — | — | — | — | WSW 5 | — |
| kJ | — | 5 | 4 | — | — | 1 | 3 | 8 | — | — | 9 | — | — | — | — | — | — | — | — | 10 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 104 | 100 | 0 | 0 | 104 | 56 | 80 | 168 | 5 | 106 | 106 | 104 | 106 | 106 | 5 | 165 | 106 | 19 | 796 | 212 | 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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