Surf Forecasts:
Viana do Castelo surf forecast from 30 Jul 2026:
- Best quality surf: Friday 31 Jul, 10PM (local time) - 4.5ft (1.4m), 6s period, NW swell with cross-offshore winds.
- Most powerful swell: Friday 31 Jul, 10PM (local time) - 4.5ft (1.4m), 6s period, NW swell with 152 kJ wave energy.
- Next surfable swell (1★+): Friday 31 Jul, 1AM (local time) - 1.5ft (0.5m), 8s period with NW 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 31) at 1AM. The primary swell is predicted to be 0.4m and 9s period with a secondary swell of 0.5m and 8s. 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 6s and forecast to arrive on Friday (Jul 31) 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 1.1m 5s period and expected on Friday (Jul 31) at 7PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Fri 31st Jul) | 1.5ft (0.5m) 8s |
| Best Surf | 10PM (Fri 31st Jul) | 4.5ft (1.4m) 6s |
| Most Powerful | 10PM (Fri 31st Jul) | 4.5ft (1.4m) 6s |
Table - best surf conditions forecast for Viana do Castelo over the next 16 days.
The Lowdown
Right then, let’s talk about what we’ve got around Viana do Castelo.
Honestly, for the next couple of weeks, it’s looking like we’re in for a bit of a flat spell with very ordinary conditions. The surf will be small and the winds aren't doing us many favours. The first real window to get excited about is the morning of Tuesday, the 4th of August. That’s the standout.
On Tuesday the 4th of August, the early session at Viana do Castelo is the best on offer. We’re looking at a clean head-high swell at around 3ft out of the west. The water is a touch warmer than normal for this time of year at 68°F. The real kicker is the glassy conditions with next to no wind. It’ll be small, but clean. The earliest we see anything before that is Thursday the 30th of July, but with a weak 2ft WNW windswell and a cross-on breeze, it’s poor. Friday the 31st of July morning will be clean with a cross-off breeze on a tiny 1ft WNW swell, but it’s really just a small wave.
After the 5th of August, the swell bumps up a touch, but the winds turn messy. There’s a window on Friday the 7th of August morning with a clean 4ft west swell and a cross-off breeze, but that swell is short period, around 7 seconds, so it’ll lack punch. That’s probably the best of the second week, but it’s not world-class.
The combined energy is weak for most of the period, rarely breaking into the moderate range. There is a moderate reading of 128 on the 4th of August morning, which supports that being the best window. Everything else hovers in the weak category.
There are long gaps here with no real quality. From the 30th of July right through to the 3rd of August, it’s all poor. Then again after the 4th of August morning, it’s pretty average until the 7th of August. For the rest of the run, if you’re a beginner, the 4th of August morning is your best bet as the swell is well under 5ft. It’s not big enough for experts to get excited.
Be aware that Viana do Castelo is a river mouth, exposed to the west swell, but crowds are often an issue here. On a clean, small day like the 4th, expect company.
All in all, pencil in the morning of Tuesday the 4th of August for the cleanest, most surfable waves of the run. The rest is mostly a skunk.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Fri morning, min 16°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 22°C on Mon morning, min 17°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Thu 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | ||||||||||||||
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 | NW 8 | WNW 9 | WNW 9 | NNW 6 | W 9 | NNW 8 | NNW 7 | W 8 | W 10 | W 9 | W 9 | W 9 | W 9 | W 8 | W 8 | W 8 | W 8 | W 8 | W 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 51 | 30 | 26 | 26 | 132 | 73 | 51 | 96 | 50 | 66 | 81 | 78 | 99 | 76 | 119 | 104 | 82 | 65 | 76 | 74 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | cross-off | cross | off | on | cross | cross | cross-on | cross-on | cross-off | cross-on | on | glassy | glassy | cross-on | off | glassy | cross-on | cross-off |
High Tide | 4:25PM3.32m | 4:46AM3.11m | 4:57PM3.39m | 5:18AM3.16m | 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 | |||||||
Low Tide | 10:35PM0.72m | 10:40AM0.77m | 11:08PM0.66m | 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 | |||||||
 |  |  | | | | | | | |  | | | | | | | | | | |
 | — | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — |
 | 8:55 | — | — | 8:54 | — | — | 8:52 | — | — | 8:52 | — | — | 8:51 | — | — | 8:50 | — | — | 8:49 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 18 | 22 | 22 | 20 | 22 | 22 | 19 | 22 | 21 | 18 | 22 | 22 | 20 | 22 | 22 | 19 | 22 | 22 | 20 |
Feels °C | 19 | 18 | 21 | 21 | 19 | 23 | 22 | 21 | 22 | 21 | 19 | 21 | 21 | 22 | 22 | 22 | 20 | 22 | 23 | 22 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | NW 8 | NW 4 | WNW 9 | W 9 | NW 6 | NNW 8 | NNW 7 | W 8 | W 10 | W 9 | W 9 | W 9 | W 7 | W 8 | W 8 | W 8 | W 8 | W 8 | W 7 |
| kJ | 51 | 29 | 5 | 26 | 61 | 37 | 51 | 96 | 50 | 66 | 81 | 78 | 99 | 57 | 119 | 104 | 82 | 65 | 76 | 74 |
Swell 2 Height (m) Direction Period (s) | NW 8 | WNW 9 | WNW 9 | W 11 | N 10 | W 9 | W 9 | W 9 | NW 5 | NNW 7 | NW 4 | NNW 8 | NNW 8 | W 9 | N 9 | N 9 | N 8 | W 10 | NW 8 | WNW 10 |
| kJ | 16 | 30 | 26 | 10 | 2 | 73 | 42 | 55 | 11 | 5 | 3 | 6 | 6 | 76 | 2 | 2 | 1 | 18 | 2 | 37 |
Swell 3 Height (m) Direction Period (s) | N 9 | W 13 | NW 8 | NW 9 | — | NNW 8 | WSW 8 | SW 8 | NNW 7 | — | NNW 7 | — | S 15 | N 8 | SW 13 | SW 13 | SW 13 | N 8 | SW 12 | SW 12 |
| kJ | 2 | 3 | 9 | 3 | — | 14 | 22 | 3 | 10 | — | 5 | — | 4 | 1 | 7 | 7 | 7 | 1 | 6 | 6 |
Wind waves Height (m) Direction Period (s) | — | — | — | NW 4 | NNW 6 | — | — | — | — | NW 4 | — | — | SW 3 | — | — | — | — | — | — | — |
| kJ | — | — | — | 21 | 132 | — | — | — | — | 7 | — | — | 2 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 317 | 0 | 0 | 130 | 0 | 126 | 151 | 2 | 18 | 100 | 0 | 71 | 104 | 0 | 0 | 100 | 0 | 0 | 104 | 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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