Surf Forecasts:
Viana do Castelo surf forecast from 21 Jul 2026:
- Best quality surf: Monday 27 Jul, 1AM (local time) - 5.5ft (1.7m), 6s period, NNW swell with cross-offshore winds.
- Most powerful swell: Saturday 25 Jul, 10PM (local time) - 6.5ft (2.0m), 7s period, NNW swell with 383 kJ wave energy.
- Next surfable swell (1★+): Tuesday 21 Jul, 7PM (local time) - 1.5ft (0.4m), 10s 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 Tuesday (Jul 21) at 7PM. The primary swell is predicted to be 0.4m and 10s period with a secondary swell of 0.4m and 6s. 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 2.0m 7s and forecast to arrive on Saturday (Jul 25) 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 1.5m 6s period and expected on Sunday (Jul 26) at 4PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7PM (Tue 21st Jul) | 1.5ft (0.4m) 10s |
| Best Surf | 1AM (Mon 27th Jul) | 5.5ft (1.7m) 6s |
| Most Powerful | 10PM (Sat 25th Jul) | 6.5ft (2.0m) 7s |
Table - best surf conditions forecast for Viana do Castelo over the next 16 days.
The Lowdown
G’day, Rusty here, and I’ve got to be straight with you – the next couple of weeks at Viana do Castelo are looking pretty grim. We’re kicking off with a long, flat spell. From Tuesday the 21st of July right through to the end of the month, it’s a whole lot of nothing worth paddling out for. The first real glimmer of hope shows up on Monday the 27th of July, but even then, it’s a short-lived window.
The first decent surf we see is on Monday morning, July 27th. The swell is a clean 3 ft from the NNW, with a period of 10 seconds, and the wind is glassy – dead calm. That’s a major positive, giving you smooth, clean faces. The combined energy is moderate at 256. The water’s sitting at 67°, which is about 2° warmer than normal for this time of year – a nice little bonus. This is the standout of the whole forecast. It’s a river mouth setup, so it’s fairly consistent, but it can get crowded, so get in early. The afternoon picks up a bit more size to 5 ft on the cross-off NNW wind, still clean, but the energy drops a touch.
After that, the quality falls away fast. Tuesday the 28th and Wednesday the 29th are small and onshore, with waves around 2 ft to 3 ft and poor conditions. Thursday the 30th and Friday the 31st of July offer tiny, glassy 2 ft waves in the morning – surfable, but very ordinary. The energy is weak, under 100.
Into the first week of August, it’s still a struggle. The morning of Sunday the 2nd of August shows a bump in swell to 4 ft from the NW, glassy, but the period is short at 6 seconds, and the energy is just moderate at 101. It’s surfable, but nothing special. The afternoon gets messy with a 12 mph cross-shore wind. The rest of the week is a write-off with tiny, weak swell and windy conditions.
The best bet? Don’t miss that Monday morning, July 27th – it’s the only window where the stars align for a proper session. Everything else is for the die-hards only.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Tue morning, min 16°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummarySome drizzle, heaviest during Fri night. Warm (max 25°C on Sun morning, min 15°C on Sat night). Winds increasing (calm on Fri night, fresh winds from the NNW by Sat afternoon). | ||||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | |||||||||||||||
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 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | NNW 7 | NNW 7 | NNW 7 | SW 5 | W 7 | W 6 | NW 8 | NNW 7 | NNW 6 | WNW 9 | NNW 6 | NNW 10 | NW 8 | NNW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 20 | 33 | 33 | 32 | 18 | 16 | 16 | 21 | 21 | 17 | 22 | 147 | 79 | 346 | 306 | 107 | 16 | 220 | 125 | 295 | 267 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | glassy | cross-on | on | cross-off | cross-on | on | cross | cross-on | on | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | glassy | cross-off | off |
High Tide | 9:14PM2.74m | 9:56AM2.64m | 10:14PM2.57m | 11:01AM2.58m | 11:26PM2.48m | 12:10PM2.60m | 00:40AM2.49m | 1:11PM2.69m | 1:41AM2.56m | 2:01PM2.82m | 2:28AM2.68m | 2:42PM2.96m | 3:07AM2.80m | ||||||||
Low Tide | 2:59PM1.33m | 3:32AM1.26m | 4:03PM1.46m | 4:34AM1.39m | 5:18PM1.51m | 5:42AM1.44m | 6:32PM1.46m | 6:46AM1.41m | 7:30PM1.35m | 7:38AM1.32m | 8:17PM1.21m | 8:21AM1.21m | 8:56PM1.06m | ||||||||
 | |  | | | | | |  | |  |  | | | | | | | | | | |
 | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — | 6:22 | — | — | 6:24 | — | — |
 | — | — | 9:04 | — | — | 9:02 | — | — | 9:01 | — | — | 9:00 | — | — | 9:00 | — | — | 9:00 | — | 8:59 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 22 | 19 | 22 | 22 | 19 | 21 | 22 | 19 | 21 | 21 | 18 | 23 | 22 | 18 | 25 | 23 | 21 | 30 | 29 | 28 |
Feels °C | 23 | 23 | 21 | 22 | 22 | 21 | 21 | 22 | 20 | 19 | 20 | 19 | 19 | 18 | 15 | 20 | 19 | 19 | 28 | 27 | 25 |
Swell 1 Height (m) Direction Period (s) | NNW 7 | NNW 7 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | W 7 | W 6 | — | — | WNW 9 | WNW 9 | NW 11 | NNW 7 | NW 8 | NNW 8 |
| kJ | 17 | 17 | 15 | 14 | 15 | 15 | 16 | 21 | 21 | 17 | 9 | 147 | 79 | — | — | 16 | 16 | 31 | 105 | 295 | 267 |
Swell 2 Height (m) Direction Period (s) | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | SW 4 | WNW 8 | WNW 8 | NNW 6 | NW 8 | — | — | NW 13 | NW 12 | — | NNW 10 | — | WNW 9 |
| kJ | 20 | 33 | 33 | 32 | 18 | 16 | 16 | 16 | 4 | 7 | 7 | 8 | 29 | — | — | 7 | 6 | — | 125 | — | 8 |
Swell 3 Height (m) Direction Period (s) | WSW 7 | N 8 | SW 14 | SW 15 | SW 14 | SW 13 | SW 13 | SW 13 | WNW 9 | SW 12 | SW 11 | S 11 | S 12 | — | — | — | — | — | WNW 9 | — | — |
| kJ | 5 | 6 | 8 | 8 | 8 | 7 | 7 | 7 | 15 | 5 | 5 | 2 | 3 | — | — | — | — | — | 26 | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | SSW 3 | — | SW 4 | SW 5 | — | — | NW 8 | NNW 7 | NNW 6 | NNW 6 | NNW 6 | — | — | — |
| kJ | — | — | — | — | — | — | — | 1 | — | 9 | 22 | — | — | 346 | 306 | 107 | 159 | 220 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 19 | 182 | 0 | 118 | 146 | 38 | 137 | 146 | 5 | 869 | 100 | 0 | 338 | 130 | 180 | 19 | 130 | 0 | 0 | 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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