Surf Forecasts:
Viana do Castelo surf forecast from 19 Jul 2026:
- Best quality surf: Monday 20 Jul, 10PM (local time) - 2ft (0.6m), 8s period, NNW swell with glassy winds.
- Most powerful swell: Monday 20 Jul, 7AM (local time) - 2.5ft (0.8m), 7s period, NNW swell with 64 kJ wave energy.
- Next surfable swell (1★+): Monday 20 Jul, 10PM (local time) - 2ft (0.6m), 8s period with NNW 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 Monday (Jul 20) at 10PM. The primary swell is predicted to be 0.6m and 8s period with a secondary swell of 0.3m and 11s. 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 0.8m 7s and forecast to arrive on Monday (Jul 20) at 7AM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Mon 20th Jul) | 2ft (0.6m) 8s |
| Best Surf | 10PM (Mon 20th Jul) | 2ft (0.6m) 8s |
| Most Powerful | 7AM (Mon 20th Jul) | 2.5ft (0.8m) 7s |
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 coming up for Viana do Castelo.
The next week and a half is pretty bleak for a paddle. We’re looking at a long stretch of tiny, weak waves and mostly messy wind. From Sunday the 19th right through to Monday the 27th, it’s a real struggle. The swell is barely a whisper, under 2 feet, and the combined energy is weak, sitting in the 10 to 91 range. The wind is mostly cross or onshore, and even the glassy moments are on tiny, weak 1 foot to 1 foot stuff. It’s a solid 9-day gap of nothing worth paddling out for.
The first real glimmer of hope comes on Tuesday the 28th. The morning sees a jump to 6 feet from the NNW, but it’s a short period of 8 seconds, and that combined energy is a solid moderate 494. The wind is clean and cross-off from the NNE. It’s a step up, but still a bit raw. The real standout of the whole 16-day window is Tuesday afternoon. That WNW swell pushes to 7 feet, still a short 8-second period, but the energy cranks to 647. The wind is fresh from the N, cross-off, keeping it clean. However, this is pushing into expert territory – this wave size is too big for beginners. It’s a river break, so that long-period caveat doesn’t apply here with the short period, but 7 feet on a river mouth can be a handful.
Then Wednesday the 29th morning offers a nice change of pace. The swell drops to 5 feet from the NW with a 9-second period, but the wind is the real story: light offshore from the ENE, 6 mph. The combined energy is a strong 355. This is the sweet spot for the week – solid, clean, and much more manageable.
After that, the swell fades back into the ordinary, with readings dropping to 3 feet and below through the end of the month and into August, with the wind turning cross-shore or onshore again. The water temperature is a touch warmer than normal, sitting at 68°.
So, if you’re an expert looking for a big, clean challenge, Tuesday afternoon is the one. For the rest of us, Wednesday morning with that offshore wind and 5 foot swell is the best call. The rest is a write-off.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Mon morning, min 16°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Wed morning, min 16°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | |||||||||||||||
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) | NW 5 | NW 6 | NW 7 | NW 7 | NNW 7 | NNW 8 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | NW 7 | WNW 8 | WNW 8 | NNW 6 | W 8 | W 8 | WNW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 14 | 15 | 50 | 51 | 47 | 37 | 20 | 33 | 33 | 32 | 31 | 16 | 16 | 16 | 15 | 14 | 13 | 8 | 5 | 7 | 9 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross | cross | on | cross-off | cross-on | cross-on | cross | glassy | cross | off | glassy | cross | off | glassy | cross | glassy | glassy | cross | cross-off |
High Tide | 7:38PM3.16m | 8:11AM2.90m | 8:23PM2.95m | 9:00AM2.76m | 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 | ||||||||
Low Tide | 1:20PM0.97m | 1:53AM0.90m | 2:06PM1.16m | 2:39AM1.09m | 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 | ||||||||
 |  |  | | | | | | | | | | | | | | | | | | | |
 | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:20 | — | — | 6:20 | — | — | 6:22 | — | — |
 | — | — | 9:05 | — | — | 9:05 | — | — | 9:04 | — | — | 9:02 | — | — | 9:01 | — | — | 9:00 | — | — | 9:00 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 19 | 23 | 23 | 19 | 23 | 22 | 18 | 23 | 22 | 18 | 22 | 22 | 18 | 21 | 21 | 18 | 21 | 21 | 18 |
Feels °C | 21 | 22 | 20 | 22 | 23 | 21 | 23 | 23 | 20 | 23 | 22 | 18 | 21 | 21 | 18 | 21 | 21 | 19 | 21 | 20 | 17 |
Swell 1 Height (m) Direction Period (s) | NW 5 | NW 6 | NW 7 | NW 7 | NNW 7 | NNW 8 | NNW 7 | NNW 7 | NNW 6 | NNW 6 | NW 6 | NNW 6 | NW 6 | NW 6 | NW 7 | NNW 7 | NNW 7 | NNW 6 | NNW 6 | W 8 | WNW 4 |
| kJ | 14 | 15 | 50 | 51 | 47 | 37 | 17 | 17 | 16 | 14 | 10 | 16 | 10 | 10 | 13 | 9 | 9 | 8 | 4 | 5 | 6 |
Swell 2 Height (m) Direction Period (s) | WNW 8 | NW 9 | W 8 | W 8 | WNW 11 | WNW 11 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | WNW 9 | WNW 8 | WNW 8 | WNW 8 | W 4 | W 10 | WNW 10 |
| kJ | 11 | 12 | 12 | 12 | 24 | 23 | 20 | 33 | 33 | 32 | 31 | 16 | 16 | 16 | 15 | 14 | 13 | 6 | 1 | 2 | 9 |
Swell 3 Height (m) Direction Period (s) | NNW 9 | W 9 | NNW 8 | WNW 12 | W 8 | W 7 | N 8 | N 8 | SW 14 | SW 15 | SW 14 | SW 13 | SW 13 | — | SW 12 | — | — | W 4 | W 8 | W 12 | W 8 |
| kJ | 8 | 14 | 7 | 15 | 4 | 4 | 5 | 5 | 8 | 8 | 8 | 7 | 7 | — | 6 | — | — | 1 | 5 | 3 | 4 |
Wind waves Height (m) Direction Period (s) | — | — | — | SSE 2 | SSW 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 4 | — |
| kJ | — | — | — | 1 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 114 | 1098 | 10 | 10 | 104 | 0 | 151 | 151 | 5 | 0 | 251 | 168 | 179 | 312 | 168 | 179 | 778 | 180 | 670 | 1175 | 151 |
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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