Surf Forecasts:
Viana do Castelo surf forecast from 2 Aug 2026:
- Best quality surf: Friday 7 Aug, 4AM (local time) - 4.5ft (1.4m), 7s period, NNW swell with cross-offshore winds.
- Most powerful swell: Wednesday 5 Aug, 10PM (local time) - 4.5ft (1.4m), 9s period, NW swell with 330 kJ wave energy.
- Next surfable swell (1★+): Sunday 2 Aug, 10PM (local time) - 2ft (0.6m), 9s period with W 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 10PM. The primary swell is predicted to be 0.6m and 9s period with a secondary swell of 0.4m and 7s. 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 1.4m 9s and forecast to arrive on Wednesday (Aug 05) 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 Thursday (Aug 06) at 1AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Sun 2nd Aug) | 2ft (0.6m) 9s |
| Best Surf | 4AM (Fri 7th Aug) | 4.5ft (1.4m) 7s |
| Most Powerful | 10PM (Wed 5th Aug) | 4.5ft (1.4m) 9s |
Table - best surf conditions forecast for Viana do Castelo over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on offer for the next couple of weeks.
Right off the bat, I gotta be honest with you – it’s a pretty flat and quiet run ahead. The first few days are looking grim. The opening session on Sunday, August 2nd, has a tiny 2ft W swell with a light glassy wind, but the wave energy is weak (65). It’s surfable, but very ordinary. The rest of that day and the next few are a write-off with poor conditions.
We get a bit of a pulse on Wednesday, August 5th, with the swell nudging up to 3ft from the NW and a clean cross-offshore wind. The energy climbs to moderate (191), but the conditions are still described as ordinary. It’s a small window, but it’s the best of a bad bunch. The standout for the entire period, if you can call it that, is a short window on Monday, August 10th. The morning sees a glassy surface with 3ft of NW swell. The water temp is a standard 66°, about average for this time of year. It’s tiny, clean, and the only real chance for a slide without fighting the wind. The rest of the week is a blur of onshore or cross-shore breeze and poor surf, keeping the energy moderate but never really turning it on.
Into the second week, the pattern doesn’t change much. The swell stays small, and the wind is mostly onshore. There’s a glassy morning on Sunday, August 16th, with 3ft of NNW swell, but it’s weak energy (80). The only other mention is Monday, August 17th, with a slightly bigger 4ft NNW swell and moderate energy (201), but the wind is cross-on and the conditions are called marginal. Nothing to get excited about.
All in all, it’s a pretty lean sixteen days. The best bet is to keep an eye on the glassy mornings, especially August 10th, for a few clean, knee-high runners. Otherwise, it’s a waiting game.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Mon morning, min 17°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Thu afternoon, min 15°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | |||||||||||||||
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 10 | W 9 | W 9 | W 7 | W 9 | W 9 | W 8 | NW 11 | NW 9 | NW 9 | NNW 9 | NNW 9 | NNW 9 | NNW 8 | NNW 7 | NNW 7 | NNW 7 | NNW 6 | NNW 7 | NNW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 41 | 65 | 81 | 127 | 109 | 152 | 122 | 112 | 90 | 128 | 182 | 103 | 90 | 92 | 270 | 108 | 90 | 175 | 39 | 91 | 286 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | glassy | cross-on | cross-on | glassy | cross-on | cross-on | off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off | cross-off | cross | cross-off |
High Tide | 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 | 11:39AM2.88m | 00:21AM2.76m | ||||||||
Low Tide | 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 | 5:10AM1.19m | 6:07PM1.17m | ||||||||
 | |  |  |  | | | |  | | | | | | | | | | | | | |
 | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — | 6:35 | — | — | 6:35 | — | — |
 | — | 8:52 | — | — | 8:51 | — | — | 8:50 | — | — | 8:49 | — | — | 8:47 | — | — | 8:45 | — | — | 8:45 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 21 | 19 | 22 | 22 | 20 | 22 | 22 | 20 | 22 | 21 | 18 | 23 | 24 | 21 | 23 | 24 | 20 | 22 | 24 | 20 |
Feels °C | 21 | 21 | 21 | 21 | 22 | 22 | 22 | 23 | 21 | 19 | 17 | 16 | 20 | 20 | 19 | 21 | 22 | 19 | 20 | 21 | 18 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 10 | W 9 | W 9 | W 7 | W 9 | W 9 | W 8 | W 8 | NW 9 | W 7 | NNW 9 | NNW 9 | NNW 9 | WNW 10 | NNW 7 | NNW 8 | W 9 | NNW 6 | W 9 | W 9 |
| kJ | 41 | 65 | 81 | 127 | 109 | 152 | 122 | 112 | 84 | 128 | 27 | 103 | 90 | 92 | 31 | 108 | 14 | 14 | 39 | 14 | 6 |
Swell 2 Height (m) Direction Period (s) | NW 4 | NNW 7 | NNW 7 | NNW 8 | WNW 9 | NW 8 | NW 12 | NW 11 | NW 11 | W 8 | WNW 10 | W 10 | W 10 | W 10 | NNW 9 | NNW 9 | W 9 | S 12 | NNW 7 | NW 10 | — |
| kJ | 13 | 5 | 5 | 6 | 80 | 2 | 5 | 30 | 90 | 43 | 35 | 52 | 70 | 49 | 8 | 15 | 15 | 3 | 19 | 4 | — |
Swell 3 Height (m) Direction Period (s) | WSW 8 | SW 8 | — | SW 15 | NW 8 | SW 14 | NNW 9 | N 9 | SW 13 | WNW 10 | SW 12 | SW 12 | SW 12 | SW 12 | SW 13 | WNW 9 | S 13 | — | W 9 | S 12 | — |
| kJ | 11 | 2 | — | 8 | 2 | 7 | 7 | 6 | 7 | 20 | 6 | 6 | 6 | 5 | 6 | 17 | 3 | — | 14 | 3 | — |
Wind waves Height (m) Direction Period (s) | — | NW 4 | — | S 3 | — | — | — | — | — | — | NW 9 | NW 6 | NW 5 | NW 5 | NNW 8 | — | NNW 7 | NNW 7 | — | NNW 7 | NNW 7 |
| kJ | — | 4 | — | 1 | — | — | — | — | — | — | 182 | 122 | 24 | 32 | 270 | — | 90 | 175 | — | 91 | 286 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 104 | 0 | 56 | 104 | 0 | 10 | 100 | 0 | 0 | 130 | 0 | 0 | 130 | 19 | 0 | 258 | 0 | 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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