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Surf Forecasts:
Supertubos surf forecast from 18 Aug 2026:
- Most powerful swell: Friday 21 Aug, 1PM (local time) - 4ft (1.2m), 10s period, NW swell with 310 kJ wave energy.
Best Forecast Surf Conditions for Supertubos this week:
The most powerful waves expected at Supertubos in the next 16 days are 1.2m 10s and forecast to arrive on Friday (Aug 21) at 1PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 8s period and expected on Sunday (Aug 23) at 7AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1PM (Fri 21st Aug) | 4ft (1.2m) 10s |
Table - best surf conditions forecast for Supertubos over the next 16 days.
The Lowdown
Alright, mates, Rusty here. Let’s be straight with you: the surf forecast for our stretch of coast over the next couple of weeks is about as inspiring as a flat day in July. We’ve got a long stretch of nothing, and I mean nothing. From the 18th right through to the 1st of September, the ocean is basically taking a holiday. We’re looking at a solid two-week gap with zero decent surf. The swell energy is laughably weak, barely reaching double digits – you’ll see values like 16, 45, or 50 in the mix, which is just background noise. It’s the kind of spell where you check the buoys out of habit, not hope.
Now, there is a light at the end of the tunnel, but it’s a long way off. On the morning of Tuesday, the 2nd of September, that’s over a week away, things finally start to wake up. We’re seeing a new SW swell pushing in at about 5 feet. The energy jumps to 522, which is a solid kick in the pants compared to everything before it. The period is 10 seconds, which is okay, not spectacular, but it’s real surf. The problem is the wind. It’s coming from the WSW at 9 mph, which puts it straight onshore at Supertubos. The wave comment for that morning is literally “poor surf conditions” – a classic case of a swell arriving with a bad attitude.
So, what do we do with all this? Honestly, there are no standout days. Not one. The only real option, and I’m using that term loosely, is to keep an eye on that Wednesday morning, September 2nd. It’s not great, and the wind is going to chop it up, but it’s the only pulse of energy in the whole window. If you’re desperate for a paddle, that’s your window, but don’t expect any classic Supertubos barrels. For the kitesurfers among us, that onshore wind and the building swell on the 2nd might actually look more appealing than it does to us on a surfboard.
The water temp is running about average for this time of year, so no surprises there. Just keep the boards waxed and wait this one out. The ocean will come back, it always does, but this forecast is a firm “stay home.”
Short Range ForecastMostly dry. Warm (max 25°C on Tue morning, min 19°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Sat afternoon, min 18°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
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 8 | SW 16 | WNW 8 | SW 14 | NW 10 | WNW 9 | WNW 9 | WNW 9 | SW 15 | WNW 9 | WNW 9 | SW 14 | SW 14 | SW 14 | WNW 8 | WNW 8 | WNW 7 | SW 13 | SW 13 | SW 13 | SW 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 10 | 38 | 13 | 33 | 26 | 48 | 44 | 44 | 34 | 16 | 48 | 40 | 32 | 33 | 12 | 12 | 10 | 7 | 7 | 7 | 6 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | on | cross-on | glassy | glassy | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 7:09AM3.05m | 7:28PM3.05m | 7:52AM2.87m | 8:16PM2.79m | 8:45AM2.72m | 9:19PM2.57m | 9:57AM2.61m | 10:46PM2.46m | 11:25AM2.62m | 00:15AM2.50m | 12:39PM2.75m | 1:17AM2.64m | 1:32PM2.93m | 2:01AM2.81m | |||||||
Low Tide | 1:09PM1.13m | 1:36AM1.23m | 1:57PM1.34m | 2:23AM1.44m | 2:59PM1.53m | 3:27AM1.61m | 4:29PM1.62m | 4:56AM1.68m | 6:04PM1.57m | 6:19AM1.60m | 7:09PM1.42m | 7:16AM1.45m | 7:54PM1.25m | ||||||||
 | |  | | | |  | | | | | | | | | | | | | | | |
 | 6:52 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — | 6:56 | — | — |
 | — | 8:29 | — | — | 8:28 | — | — | 8:25 | — | — | 8:24 | — | — | 8:23 | — | — | 8:22 | — | — | 8:21 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 23 | 21 | 23 | 23 | 21 | 22 | 22 | 19 | 19 | 19 | 19 | 19 | 20 | 19 | 19 | 19 | 19 | 20 | 20 | 18 |
Feels °C | 23 | 21 | 25 | 23 | 23 | 23 | 22 | 22 | 15 | 15 | 14 | 15 | 15 | 15 | 13 | 13 | 13 | 14 | 17 | 18 | 16 |
Swell 1 Height (m) Direction Period (s) | NNW 8 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | NNW 6 | WNW 9 | WNW 9 | NNW 12 | NNW 11 | WNW 9 | NNW 11 | WNW 9 | WNW 8 | WNW 8 | WNW 8 | WNW 7 | SW 13 | SW 13 | W 8 | SW 12 |
| kJ | 270 | 186 | 135 | 94 | 68 | 26 | 44 | 44 | 50 | 222 | 48 | 102 | 26 | 24 | 12 | 12 | 10 | 7 | 7 | 1 | 6 |
Swell 2 Height (m) Direction Period (s) | WNW 8 | WNW 8 | WNW 8 | WNW 8 | NW 10 | WNW 9 | NNW 5 | NW 11 | NW 10 | WNW 9 | SW 15 | WNW 8 | SW 14 | SW 14 | SW 14 | SW 14 | SW 13 | — | — | SW 13 | W 11 |
| kJ | 6 | 6 | 13 | 12 | 26 | 48 | 10 | 30 | 27 | 16 | 33 | 40 | 32 | 33 | 8 | 7 | 7 | — | — | 7 | 2 |
Swell 3 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 15 | SW 14 | WNW 8 | SW 13 | SSW 5 | SSW 5 | SW 15 | SW 15 | — | SW 14 | — | — | — | — | — | — | — | — | W 11 |
| kJ | 10 | 38 | 8 | 33 | 6 | 28 | 4 | 2 | 34 | 9 | — | 29 | — | — | — | — | — | — | — | — | 2 |
Wind waves Height (m) Direction Period (s) | — | SW 3 | — | — | — | — | — | NW 5 | NW 8 | NNW 7 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 7 |
| kJ | — | 6 | — | — | — | — | — | 11 | 416 | 293 | 731 | 624 | 748 | 528 | 804 | 889 | 652 | 525 | 451 | 302 | 223 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 2 | 69 | 2 | 2 | 2 | 1 | 2 | 380 | 360 | 561 | 380 | 180 | 225 | 503 | 408 | 547 | 455 | 152 | 100 | 413 | 80 |
Best forecast wave conditions in Peniche | |||||||||||||||||||||
Best forecast wave conditions in Portugal | |||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Supertubos surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Supertubos Surf forecast
The above surf forecast table for Supertubos provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Supertubos can be found by selecting the local surf guide option on the grey menu. Our Supertubos 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 (Supertubos) 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 Supertubos 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.
Supertubos is 2 km (1 miles) from Peniche. If you plan a holiday in Peniche, look for hotels and other accommodation in Peniche. Peniche has rooms for a wide range of budgets as well as car hire and transport links.
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