Surf Forecasts:
Viana do Castelo surf forecast from 1 Aug 2026:
- Best quality surf: Thursday 6 Aug, 1AM (local time) - 4ft (1.2m), 9s period, NNW swell with cross-offshore winds.
- Most powerful swell: Thursday 6 Aug, 4AM (local time) - 4.5ft (1.3m), 8s period, NNW swell with 212 kJ wave energy.
- Next surfable swell (1★+): Sunday 2 Aug, 1AM (local time) - 2.5ft (0.8m), 7s 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 Sunday (Aug 02) at 1AM. The primary swell is predicted to be 0.8m and 7s period with a secondary swell of 0.6m and 9s. 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 1.3m 8s and forecast to arrive on Thursday (Aug 06) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Thursday (Aug 06) at 7PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sun 2nd Aug) | 2.5ft (0.8m) 7s |
| Best Surf | 1AM (Thu 6th Aug) | 4ft (1.2m) 9s |
| Most Powerful | 4AM (Thu 6th Aug) | 4.5ft (1.3m) 8s |
Table - best surf conditions forecast for Viana do Castelo over the next 16 days.
The Lowdown
Alright, I’m looking at the numbers for Viana do Castelo, and honestly, it’s one of those quiet spells where the ocean just isn’t giving us much. The whole 16-day window is a bit of a struggle for decent waves, with only a few small windows where you might get a surfable wave.
The water temperature is sitting at 67°F, which is about average for this time of year, so no surprises there.
The only real standout in this whole forecast is early on Saturday morning, 1st August. You’ll find glassy conditions with a light offshore wind from the SW, and a small 2ft swell from the west at 9 seconds. Combined swell energy is weak (125), so it’s not going to be powerful, but it’s clean and surfable for a beginner-friendly session at Viana do Castelo (river). The swell direction is west, which is a good match for the optimum here. It’s not going to blow your mind, but it’s the best of a pretty quiet run.
After that, the outlook drops off fast. There’s a gap of a few days where conditions are poor, with onshore winds and small, messy waves. Sunday morning, 2nd August, has another glassy morning but the swell drops to 2ft with even weaker energy (65), so it’s very marginal.
Later in the week, Thursday morning, 6th August, shows a bit of a bump – a 3ft swell from the NNW with clean cross-offshore winds and moderate energy (220). That’s the best wave size of the period, but it’s still small and the period is short (8 seconds), so it’s not going to have much push. Still, it’s clean and might offer a few fun little waves for the experienced.
The rest of the forecast is a mix of small swells, cross-shore winds, and often poor surf conditions. The second week is particularly weak, with tiny swells and strong winds, mostly from the NNW, making it look more like a kitesurfing setup than a paddle surf one. There’s no real swell to get excited about, and the consistency is poor.
Bottom line: if you’re desperate for a surf, hit the Saturday morning (1st August) or the Thursday morning (6th August) for the cleanest, most surfable conditions. Otherwise, it’s a quiet period for Viana.
Rusty
Short Range ForecastMostly dry. Warm (max 22°C on Sat morning, min 16°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Thu morning, min 16°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | |||||||||||||||
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) | W 9 | W 9 | NNW 7 | W 9 | W 10 | W 9 | W 9 | W 7 | W 9 | W 9 | W 8 | W 8 | W 8 | NW 8 | NNW 9 | NNW 8 | NW 9 | W 10 | NW 8 | NNW 8 | NNW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 73 | 60 | 62 | 41 | 65 | 61 | 99 | 109 | 153 | 122 | 109 | 86 | 43 | 75 | 202 | 140 | 182 | 46 | 62 | 37 | 21 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | glassy | glassy | cross | glassy | cross-on | on | glassy | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross | glassy | cross-on | cross | cross-off |
High Tide | 5:31PM3.41m | 5:52AM3.19m | 6:06PM3.38m | 6:30AM3.18m | 6:45PM3.29m | 7:12AM3.12m | 7:29PM3.16m | 8:01AM3.03m | 8:22PM2.99m | 9:00AM2.92m | 9:28PM2.82m | 10:14AM2.85m | 10:51PM2.72m | ||||||||
Low Tide | 11:15AM0.72m | 11:41PM0.64m | 11:50AM0.73m | 00:18AM0.66m | 12:30PM0.78m | 00:57AM0.73m | 1:14PM0.89m | 1:42AM0.85m | 2:06PM1.03m | 2:36AM1.00m | 3:12PM1.17m | 3:46AM1.14m | 4:37PM1.24m | ||||||||
 |  |  | | |  | | | | | | | | | | | | | | | | |
 | 6:28 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — |
 | — | 8:52 | — | — | 8:52 | — | — | 8:51 | — | — | 8:50 | — | — | 8:49 | — | — | 8:47 | — | — | 8:45 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 18 | 21 | 21 | 18 | 22 | 22 | 20 | 22 | 22 | 19 | 22 | 21 | 18 | 23 | 23 | 20 | 22 | 22 | 19 |
Feels °C | 22 | 22 | 19 | 21 | 21 | 19 | 20 | 22 | 22 | 22 | 23 | 20 | 20 | 18 | 17 | 21 | 20 | 20 | 22 | 22 | 19 |
Swell 1 Height (m) Direction Period (s) | W 9 | NNW 8 | NNW 7 | NW 5 | W 10 | W 9 | W 9 | W 7 | W 9 | W 9 | W 8 | W 8 | W 8 | W 7 | W 10 | W 10 | W 10 | NNW 8 | NW 8 | NNW 8 | NNW 7 |
| kJ | 73 | 42 | 62 | 13 | 65 | 61 | 99 | 109 | 153 | 122 | 109 | 86 | 43 | 26 | 52 | 70 | 49 | 45 | 62 | 37 | 21 |
Swell 2 Height (m) Direction Period (s) | NW 6 | W 9 | W 9 | W 9 | NNW 7 | NW 7 | NNW 8 | W 9 | NW 8 | NNW 8 | NNW 11 | NW 9 | NW 8 | WNW 10 | W 7 | SW 12 | SW 12 | W 10 | WNW 9 | W 9 | W 9 |
| kJ | 35 | 60 | 55 | 41 | 5 | 13 | 6 | 57 | 2 | 7 | 11 | 23 | 35 | 33 | 14 | 6 | 5 | 46 | 28 | 15 | 14 |
Swell 3 Height (m) Direction Period (s) | NW 8 | WSW 8 | SW 8 | WSW 8 | SW 8 | NW 4 | SW 15 | NNW 8 | SW 14 | NW 11 | NNW 9 | SW 13 | WNW 10 | NW 11 | SW 12 | S 15 | — | SW 11 | W 6 | SW 6 | SW 12 |
| kJ | 17 | 22 | 3 | 11 | 2 | 2 | 8 | 6 | 7 | 4 | 7 | 7 | 20 | 29 | 6 | 4 | — | 5 | 1 | 1 | 6 |
Wind waves Height (m) Direction Period (s) | — | NNW 6 | — | — | NW 4 | — | SSE 2 | — | — | — | — | — | — | NW 8 | NNW 9 | NNW 8 | NW 9 | NW 6 | — | — | — |
| kJ | — | 24 | — | — | 4 | — | 1 | — | — | — | — | — | — | 75 | 202 | 140 | 182 | 77 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 130 | 0 | 0 | 964 | 0 | 18 | 104 | 0 | 79 | 104 | 0 | 0 | 1225 | 0 | 0 | 284 | 0 | 168 | 182 | 0 |
Best forecast wave conditions in Douro and Minho | |||||||||||||||||||||
Best forecast wave conditions in Portugal | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Viana do Castelo surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest