Surf Forecasts:
Viana do Castelo surf forecast from 4 Jul 2026:
- Best quality surf: Saturday 11 Jul, 1AM (local time) - 6ft (1.9m), 8s period, WNW swell with cross-offshore winds.
- Most powerful swell: Saturday 11 Jul, 4AM (local time) - 6ft (1.9m), 9s period, WNW swell with 534 kJ wave energy.
- Next surfable swell (1★+): Saturday 4 Jul, 4PM (local time) - 1.5ft (0.5m), 10s 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 Saturday (Jul 04) at 4PM. The primary swell is predicted to be 0.5m and 10s period with a secondary swell of 0.3m and 8s. 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 1.9m 9s and forecast to arrive on Saturday (Jul 11) 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 0.5m 4s period and expected on Tuesday (Jul 07) at 10PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Sat 4th Jul) | 1.5ft (0.5m) 10s |
| Best Surf | 1AM (Sat 11th Jul) | 6ft (1.9m) 8s |
| Most Powerful | 4AM (Sat 11th Jul) | 6ft (1.9m) 9s |
Table - best surf conditions forecast for Viana do Castelo over the next 16 days.
Updates in hr min s Forecast update imminent
So here’s how it shakes out. We’re looking at a dry spell from now, the 4th of July, all the way through to the 10th. That’s a whole week of skinny waves. The best of that poor lot is the Saturday morning (4th July) with a tiny 0.6m WNW swell pushing in from the south, with glassy winds. It’s a surfable wave but very ordinary. The swell energy is weak, sitting at just 109. It’s a river-mouth setup so it can be fun on a board, but you’ll be scratching for anything decent.
Then we get a bit of a jump. On Saturday the 11th, we start seeing some size. The morning brings a 1.8m WNW swell with a short period of 8 seconds. The wind is a clean cross-offshore from the NNW, so the face will be tidy. The combined energy jumps up to a moderate 636. This is the standout window. It’s not perfect—period is short, so it’ll be a bit lumpy and close together, but it’s the biggest, cleanest swell we’ve seen. The afternoon gets a bit chunkier at 2.0m from the NW, but the wind picks up to a fresh 35 km/h, making it a bit more of a handful. This size is more for the experienced crew.
Sunday the 12th holds in at 1.5m to 1.6m from the NW, still with that cross-off wind but the wind is strong again in the afternoon. The energy is still moderate (around 397-425). It’s rideable but it’s not going to be a classic.
After that, the swell backs off again. There’s a slight uptick on Tuesday the 14th morning with a 1.1m NNW swell and a gentle cross-off breeze—that’s another clean, smaller option but nothing to shout about. From the 15th onward, it drops right back down to knee-to-waist high mush, all the way through the end of the forecast.
Best Bet: Without a doubt, Saturday morning, July 11th is the one to aim for. Head to Viana do Castelo. That 1.8m WNW swell combined with the clean NNW cross-off wind is as good as it gets in this stretch. It’s a river mouth break, so it’ll handle that short period better than a beach. Just a heads up, crowds are likely here—it's *often* packed when there’s something to ride.
Stay tuned, forecasts can change.
Short Range ForecastMostly dry. Warm (max 32°C on Sat morning, min 17°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Wed morning, min 16°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Saturday 4 | Sunday 5 | Monday 6 | Tuesday 7 | Wednesday 8 | Thursday 9 | Friday 10 | |||||||||||||||
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 | W 10 | NW 11 | NW 10 | NW 10 | NW 9 | WNW 10 | WNW 10 | WNW 9 | WNW 8 | W 8 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 82 | 50 | 31 | 50 | 47 | 21 | 32 | 31 | 26 | 13 | 12 | 20 | 38 | 54 | 72 | 65 | 47 | 78 | 94 | 68 | 494 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | glassy | cross-on | cross | glassy | cross-on | cross | cross-off | cross | cross | cross-off | cross-off | cross-off | off | on | cross | glassy | cross-on | cross-off | cross-off |
High Tide | 6:30PM3.21m | 6:57AM2.96m | 7:12PM3.16m | 7:42AM2.93m | 7:59PM3.08m | 8:35AM2.90m | 8:54PM2.99m | 9:35AM2.89m | 9:58PM2.90m | 10:44AM2.91m | 11:11PM2.87m | 11:56AM3.00m | 00:26AM2.91m | ||||||||
Low Tide | 12:11PM0.93m | 00:45AM0.85m | 12:53PM0.98m | 1:27AM0.89m | 1:41PM1.04m | 2:16AM0.94m | 2:37PM1.12m | 3:14AM1.00m | 3:44PM1.17m | 4:20AM1.04m | 5:00PM1.16m | 5:32AM1.02m | 6:16PM1.07m | ||||||||
 | |  | | |  | | | | | | | |  | | | | | | | | |
 | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | — | 9:13 | — | — | 9:12 | — | — | 9:12 | — | — | 9:12 | — | — | 9:12 | — | — | 9:10 | — | — | 9:10 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 32 | 31 | 31 | 32 | 30 | 26 | 25 | 24 | 18 | 23 | 22 | 19 | 26 | 25 | 21 | 25 | 25 | 20 | 21 | 21 | 17 |
Feels °C | 30 | 29 | 29 | 29 | 28 | 24 | 24 | 23 | 18 | 22 | 20 | 17 | 22 | 22 | 20 | 23 | 23 | 19 | 21 | 21 | 16 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | W 10 | WNW 10 | NW 10 | NW 10 | NW 9 | WNW 10 | WNW 10 | WNW 9 | WNW 8 | W 8 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | NW 5 | WNW 9 | WNW 9 | WNW 8 |
| kJ | 82 | 50 | 31 | 50 | 47 | 21 | 32 | 31 | 26 | 13 | 12 | 20 | 38 | 54 | 72 | 65 | 47 | 23 | 94 | 68 | 494 |
Swell 2 Height (m) Direction Period (s) | NNW 6 | NW 8 | NW 5 | WNW 9 | WNW 9 | WNW 9 | NW 9 | NW 8 | NNW 8 | NNW 8 | NW 8 | W 8 | W 8 | — | NW 4 | NW 4 | WNW 11 | WNW 9 | SW 17 | NW 15 | NW 12 |
| kJ | 17 | 11 | 7 | 28 | 16 | 16 | 19 | 17 | 6 | 6 | 2 | 10 | 4 | — | 8 | 5 | 13 | 78 | 11 | 8 | 73 |
Swell 3 Height (m) Direction Period (s) | NNW 10 | NW 12 | NW 11 | NNW 5 | SW 14 | NW 5 | SW 12 | SW 13 | S 13 | W 12 | NW 11 | NW 7 | NW 7 | — | — | NW 12 | S 17 | SW 16 | — | SW 17 | SW 17 |
| kJ | 10 | 6 | 31 | 3 | 7 | 1 | 6 | 6 | 3 | 3 | 5 | 2 | 2 | — | — | 6 | 6 | 10 | — | 11 | 11 |
Wind waves Height (m) Direction Period (s) | — | NNW 6 | — | — | NW 5 | NW 3 | — | NW 8 | WNW 3 | WNW 3 | NW 3 | NW 4 | NW 4 | NW 3 | — | — | NW 4 | — | NW 5 | WNW 6 | — |
| kJ | — | 12 | — | — | 7 | 1 | — | 24 | 1 | 1 | 5 | 9 | 5 | 5 | — | — | 5 | — | 31 | 39 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 29 | 106 | 19 | 179 | 317 | 38 | 622 | 960 | 5 | 0 | 769 | 0 | 19 | 205 | 0 | 100 | 0 | 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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