Surf Forecasts:
Viana do Castelo surf forecast from 30 Jul 2026:
- Best quality surf: Thursday 30 Jul, 7AM (local time) - 2ft (0.6m), 10s period, WNW swell with glassy winds.
- Most powerful swell: Saturday 1 Aug, 1AM (local time) - 4ft (1.2m), 6s period, NW swell with 109 kJ wave energy.
- Next surfable swell (1★+): Thursday 30 Jul, 7AM (local time) - 2ft (0.6m), 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 Thursday (Jul 30) at 7AM. The primary swell is predicted to be 0.6m and 10s period with a secondary swell of 0.4m 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 1.2m 6s and forecast to arrive on Saturday (Aug 01) at 1AM. Winds are predicted to be 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 Friday (Jul 31) at 10PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Thu 30th Jul) | 2ft (0.6m) 10s |
| Best Surf | 7AM (Thu 30th Jul) | 2ft (0.6m) 10s |
| Most Powerful | 1AM (Sat 1st Aug) | 4ft (1.2m) 6s |
Table - best surf conditions forecast for Viana do Castelo over the next 16 days.
The Lowdown
Alright folks, Rusty here, and I’ve been staring at what’s on offer for the next couple of weeks. Gotta be straight with you – it’s a lean run. We’ve got patchy, small conditions for the foreseeable future, with nothing that screams "drop everything and go." The first real glimmer of something better doesn’t show up for a bit over a week, so be patient.
Let’s start at the beginning. For Thursday the 30th and Friday the 31st of July at Viana do Castelo, we’re looking at tiny waves. Thursday morning offers a glassy 2ft from the WNW, but it’s short-period junk at 10 seconds, with weak energy (86). It’s surfable, but it’s a grovel. Friday morning cleans up a bit with cross-offshore winds, but the swell drops to just 1ft. The afternoons get chopped up by a cross-breeze, making it a write-off.
The weekend is pretty grim. Saturday the 1st of August sees onshore wind with a poor 2ft. Sunday the 2nd starts glassy with a 2ft swell, but the energy is weak. It’s another long week of similar stuff: small, wind-affected, and unremarkable. The water temperature is about average for the time of year, nothing out of the ordinary.
Now, here’s the standout in an otherwise quiet outlook. Mark your calendars for Tuesday the 11th of August. The morning at Viana do Castelo shapes up to be the best we’ve got in this whole 16-day window. We’re looking at a glassy, clean morning with a pulse of 4ft swell from the NNW. The wave energy bumps up to (168), giving it a bit more push. It’s short period though, 7 seconds, so it’ll be a bit crumbly and won't have that long groundswell wall, but it’s still the most size and the best shape in the whole forecast. The afternoon gets a bit messy as the swell jumps to 6ft, but it gets a cross-breeze, so the morning is the real window. This break is a river mouth, and it’s fairly consistent, but can get crowded often.
The rest of the second week stays small and weak. Wednesday the 12th and Thursday the 13th of August are back to barely rideable conditions. There’s just not enough push to get excited about.
So, the honest call: save your energy for that Tuesday morning, August the 11th. Hit the dawn patrol for the cleanest, biggest conditions we’re going to see. Everything else is a skunk waiting to happen.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Sat morning, min 15°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 22°C on Mon afternoon, min 16°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | |||||||||||||||
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 9 | WNW 9 | WNW 9 | NW 6 | W 9 | NNW 8 | NW 6 | W 8 | W 10 | W 9 | W 9 | W 7 | W 7 | W 9 | W 8 | W 8 | W 10 | W 11 | W 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 52 | 51 | 30 | 26 | 26 | 109 | 73 | 43 | 77 | 51 | 89 | 80 | 78 | 82 | 45 | 99 | 88 | 86 | 68 | 82 | 82 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | glassy | cross-off | cross | off | on | cross | glassy | glassy | cross | glassy | cross-on | on | cross-on | on | cross-on | glassy | cross-on | cross-on | cross |
High Tide | 4:14AM3.02m | 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 | 10:07AM0.85m | 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 | |||||||
 |  |  |  | | | | | | | |  | | | | | | | | | | |
 | 6:26 | — | — | 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 | 19 | 17 | 21 | 21 | 19 | 22 | 22 | 18 | 21 | 21 | 18 | 21 | 22 | 20 | 22 | 22 | 19 | 22 | 22 | 19 |
Feels °C | 20 | 18 | 17 | 20 | 19 | 19 | 23 | 22 | 19 | 21 | 20 | 19 | 21 | 22 | 22 | 22 | 22 | 20 | 21 | 21 | 19 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | WNW 10 | NNW 4 | NW 4 | WNW 9 | NW 6 | NW 6 | W 9 | NW 6 | W 8 | W 10 | W 9 | W 9 | W 7 | W 7 | W 9 | W 8 | W 8 | W 10 | W 11 | W 11 |
| kJ | 52 | 51 | 13 | 9 | 26 | 109 | 35 | 42 | 77 | 51 | 89 | 80 | 78 | 82 | 45 | 99 | 88 | 86 | 68 | 82 | 82 |
Swell 2 Height (m) Direction Period (s) | NW 8 | NW 8 | WNW 9 | WNW 9 | W 11 | W 9 | W 9 | WSW 8 | W 9 | NW 4 | NNW 7 | NW 7 | NNW 8 | W 9 | W 9 | NW 10 | N 9 | NW 8 | NW 7 | NW 7 | NW 6 |
| kJ | 32 | 16 | 30 | 26 | 10 | 61 | 73 | 22 | 56 | 9 | 5 | 12 | 6 | 42 | 40 | 4 | 6 | 14 | 43 | 30 | 15 |
Swell 3 Height (m) Direction Period (s) | N 9 | N 9 | NW 8 | NW 8 | NW 9 | NNW 8 | NW 8 | — | SW 8 | NNW 7 | — | NNW 7 | SW 15 | NNW 8 | N 8 | N 9 | SW 13 | N 8 | SW 12 | WSW 5 | WSW 6 |
| kJ | 2 | 2 | 9 | 9 | 3 | 7 | 16 | — | 3 | 5 | — | 5 | 8 | 6 | 1 | 6 | 7 | 1 | 6 | 3 | 3 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NW 4 | — | — | NNW 8 | — | — | NW 4 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 28 | — | — | 43 | — | — | 7 | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 244 | 0 | 0 | 130 | 0 | 130 | 100 | 0 | 0 | 104 | 0 | 18 | 104 | 10 | 104 | 104 | 0 | 18 | 104 | 2 |
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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