Surf Forecasts:
Praia do Guincho surf forecast from 31 Aug 2026:
- Best quality surf: Sunday 6 Sep, 4AM (local time) - 4.5ft (1.4m), 12s period, NW swell with cross-offshore winds.
- Most powerful swell: Monday 31 Aug, 4PM (local time) - 6ft (1.9m), 10s period, NW swell with 725 kJ wave energy.
- Next surfable swell (1★+): Sunday 6 Sep, 4AM (local time) - 4.5ft (1.4m), 12s period with NW swell.
Best Forecast Surf Conditions for Praia do Guincho this week:
The surf forecast for Praia do Guincho over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 06) at 4AM. The primary swell is predicted to be 1.4m and 12s period with a secondary swell of 0.7m and 7s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Praia do Guincho in the next 16 days are 1.9m 10s and forecast to arrive on Monday (Aug 31) at 4PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.1m 11s period and expected on Monday (Aug 31) at 4PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Sun 6th Sep) | 4.5ft (1.4m) 12s |
| Best Surf | 4AM (Sun 6th Sep) | 4.5ft (1.4m) 12s |
| Most Powerful | 4PM (Mon 31st Aug) | 6ft (1.9m) 10s |
Table - best surf conditions forecast for Praia do Guincho over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what’s cooking for Praia do Guincho.
We’re looking at a pretty rough start to the outlook, I won't lie to you. There’s a big, frustrating gap with nothing worth getting wet for. From Monday the 31st of August all the way through to Friday the 4th of September, it’s a write-off. The wind is hammering straight cross-shore and the waves are a lumpy, chunky mess – not even worth a paddle.
That north wind finally eases back on the morning of Saturday the 5th of September, swinging to a light cross-offshore breeze. The swell is small, only around 2.6ft from the WNW, but the clean conditions (265 combined energy) are a welcome sight after that poor run. It’s marginal, but it’s the first sign of life.
The real standout, the one you’ve been waiting for, is the morning of Sunday the 6th of September. It’s glassy – totally dead calm wind, with a clean 4.3ft groundswell rolling in from the NW at a nice long 12-second period. The energy is solid at 534, and those conditions are about as good as it gets for a clean, lined-up wave. This is the pick of the near-term, for sure.
Monday the 7th of September carries that clean feel with a light cross-offshore breeze again, but the swell drops to 2.3ft from the WNW. It’s got a very long period of 14 seconds and moderate energy (340), so if you’ve got a log, it could be fun, but expect long lulls between sets.
After that, we slip back into a long run of poor, choppy conditions from Tuesday the 8th through to Tuesday the 15th of September. That north-west wind just won’t quit, and the surf quality takes a real beating. There are a couple of marginal windows on the 12th and the 14th, but nothing you’d set your alarm for.
The best on offer, though it’s a long way out, is the morning of Tuesday the 15th of September. This is the one for the experienced crew. We’re looking at a solid 6.9ft of WNW groundswell with a very long 14-second period. The combined energy is massive at 1625, and the wind is light and clean from the NE. That’s going to be powerful, clean, and pumping. For a wave like Guincho, that’s a proper session, but only if you know what you’re doing – that’s expert territory.
Short Range ForecastMostly dry. Warm (max 20°C on Wed morning, min 18°C on Mon morning). Winds decreasing (fresh winds from the N on Tue night, light winds from the N by Wed night). | Days 4-6 Weather SummarySome drizzle, heaviest during Sat night. Warm (max 32°C on Sat morning, min 20°C on Thu morning). Winds decreasing (fresh winds from the NNW on Fri night, light winds from the SE by Sat night). | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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 9 | NW 10 | NW 10 | NW 9 | NNW 9 | NNW 9 | NNW 7 | NNW 8 | NNW 7 | NNW 7 | NNW 7 | NNW 6 | WNW 8 | NNW 6 | WNW 9 | WNW 9 | NW 15 | NW 13 | NW 12 | NW 11 | NW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 179 | 725 | 273 | 528 | 523 | 512 | 218 | 256 | 172 | 132 | 99 | 70 | 58 | 47 | 106 | 106 | 485 | 663 | 494 | 429 | 184 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-off | cross-off | cross | cross-on | glassy | on | cross |
High Tide | 5:17PM2.89m | 5:38AM2.72m | 5:55PM2.75m | 6:17AM2.61m | 6:39PM2.56m | 7:04AM2.46m | 7:33PM2.34m | 8:06AM2.30m | 8:48PM2.14m | 9:30AM2.21m | 10:27PM2.08m | 11:05AM2.27m | 11:58PM2.19m | ||||||||
Low Tide | 11:03AM0.19m | 11:27PM0.17m | 11:40AM0.27m | 00:04AM0.31m | 12:22PM0.41m | 00:47AM0.49m | 1:14PM0.59m | 1:41AM0.70m | 2:23PM0.76m | 2:57AM0.88m | 4:00PM0.84m | 4:37AM0.91m | 5:40PM0.72m | ||||||||
 | |  |  | | | | | | | | | | |  | |  |  | | | | |
 | 7:05 | — | — | 7:05 | — | — | 7:07 | — | — | 7:07 | — | — | 7:09 | — | — | 7:09 | — | — | 7:09 | — | — |
 | — | 8:09 | — | — | 8:08 | — | — | 8:07 | — | — | 8:06 | — | — | 8:04 | — | — | 8:01 | — | — | 8:00 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — |
Temp °C | 19 | 19 | 18 | 19 | 19 | 18 | 20 | 20 | 20 | 23 | 23 | 22 | 25 | 23 | 26 | 32 | 26 | 29 | 27 | 25 | 30 |
Feels °C | 14 | 14 | 13 | 15 | 14 | 13 | 18 | 17 | 19 | 21 | 20 | 19 | 22 | 19 | 22 | 28 | 21 | 25 | 27 | 24 | 28 |
Swell 1 Height (m) Direction Period (s) | NW 9 | SW 16 | NW 10 | SSW 15 | SSW 15 | SSW 14 | NW 8 | SSW 16 | SSW 15 | NNW 7 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 9 | NNW 6 | NW 15 | NW 13 | NW 12 | NW 11 | NW 10 |
| kJ | 179 | 11 | 273 | 23 | 22 | 21 | 68 | 24 | 21 | 132 | 47 | 48 | 58 | 44 | 106 | 57 | 485 | 663 | 494 | 429 | 184 |
Swell 2 Height (m) Direction Period (s) | W 11 | S 11 | SW 16 | — | — | — | SSW 15 | — | NW 10 | NW 9 | SSW 14 | SSW 14 | SW 13 | WNW 10 | SW 13 | WNW 9 | NNW 7 | NNW 7 | N 6 | S 11 | WNW 9 |
| kJ | 21 | 2 | 10 | — | — | — | 23 | — | 4 | 21 | 20 | 19 | 7 | 39 | 7 | 106 | 84 | 69 | 40 | 3 | 26 |
Swell 3 Height (m) Direction Period (s) | SW 18 | — | S 10 | — | — | — | — | — | W 10 | SSW 14 | — | N 9 | NW 8 | SW 13 | — | NW 17 | WNW 9 | WNW 8 | S 12 | S 11 | NNW 6 |
| kJ | 12 | — | 2 | — | — | — | — | — | 2 | 20 | — | 2 | 3 | 7 | — | 102 | 94 | 40 | 3 | 3 | 7 |
Wind waves Height (m) Direction Period (s) | NNW 5 | NW 10 | NNW 6 | NW 9 | NNW 9 | NNW 9 | NNW 7 | NNW 8 | NNW 7 | — | NNW 7 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | — | — | — | — | — | — |
| kJ | 91 | 725 | 164 | 528 | 523 | 512 | 218 | 256 | 172 | — | 99 | 70 | 45 | 47 | 69 | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 215 | 215 | 15 | 215 | 215 | 108 | 7 | 196 | 14 | 10 | 7 | 7 | 7 | 10 | 7 | 7 | 164 | 7 | 0 | 164 | 7 |
Best forecast wave conditions in Lisboa | |||||||||||||||||||||
Best forecast wave conditions in Portugal | |||||||||||||||||||||
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Information about the Praia do Guincho Surf forecast
The above surf forecast table for Praia do Guincho provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Praia do Guincho can be found by selecting the local surf guide option on the grey menu. Our Praia do Guincho 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 (Praia do Guincho) 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 Praia do Guincho 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.
Praia do Guincho is 5 km (3 miles) from Alcabideche. If you plan a holiday in Lisboa, look for hotels and other accommodation in Alcabideche. Alcabideche has rooms for a wide range of budgets as well as car hire and transport links.
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