Surf Forecasts:
Praia das Macas surf forecast from 12 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 10AM (local time) - 5ft (1.6m), 8s period, NNW swell with glassy winds.
- Most powerful swell: Sunday 16 Aug, 7AM (local time) - 10ft (3.0m), 9s period, NNW swell with 1,266 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 10AM (local time) - 5ft (1.6m), 8s period with NNW swell.
Best Forecast Surf Conditions for Praia das Macas this week:
The surf forecast for Praia das Macas over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 10AM. The primary swell is predicted to be 1.6m and 8s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Praia das Macas in the next 16 days are 3.0m 9s and forecast to arrive on Sunday (Aug 16) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Tuesday (Aug 18) at 1PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Tue 18th Aug) | 5ft (1.6m) 8s |
| Best Surf | 10AM (Tue 18th Aug) | 5ft (1.6m) 8s |
| Most Powerful | 7AM (Sun 16th Aug) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Praia das Macas over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get straight into it. The next 16 days at Praia das Macas are a real mixed bag. We’ve got a persistent run of cross-onshore winds that’s going to mess up a lot of the surf, but there’s a very narrow window where conditions line up just right. The water temperature is 71°, which is about average for this time of year, so no surprise there.
The first few days are a write-off. Wednesday the 12th through to Saturday the 15th of August, the wind is cross-onshore and building, with swell height climbing from 3 ft up to 8 ft. The combined energy starts at 173 and rockets to 985, but the wind makes it messy and poor. Definitely not worth paddling out.
Sunday the 16th, the swell sticks around 8 ft to 8 ft, with a strong 1117 energy reading on the morning, but the wind is still cross-onshore and choppy. The morning is a “marginal” call, but it’s not clean enough.
Now, here’s the standout. On Monday the 17th of August, we get a clear winner. The morning is glassy – ENE wind at 3 mph, dead offshore. The swell is a solid 8 ft from the NNW with a 9-second period, and the combined energy is 879. This is the best window in the whole outlook. The break is a consistent, exposed beach, so that 8 ft swell will be powerful. It’s a bit on the bigger side for beginners, but for intermediate and above, it’s going to be a great session. Keep in mind this spot is exposed to the NW, and the swell direction is NNW, which is a good match. The afternoon starts to get onshore and messy, so get in early.
After that, the wind turns cross-onshore again from Tuesday the 18th through to the end of the outlook. The swell drops to 5 ft to 6 ft, then builds back up to well over 8 ft by the 22nd and 23rd, with energy readings hitting 1707. But the cross-onshore wind and choppy conditions are a consistent theme. From the 20th of August onwards, the wind is fresh to strong, and the surf is all cross-onshore and messy. The last few days, the 24th to the 27th, are more of the same – poor with onshore wind and lumpy conditions. There’s a long gap of poor surf from the 18th until the end of the forecast period. Honestly, from the 20th onward, the swell is big but the wind is so cross-onshore at a beach break that it might be more interesting for kite surfing than paddle surfing.
The only real standout is Monday morning, the 17th of August. That’s the one to circle. For the rest of the 16 days, it’s a tough run.
Rusty.
Short Range ForecastMostly dry. Warm (max 21°C on Wed afternoon, min 19°C on Wed night). Winds increasing (light winds from the N on Thu morning, strong winds from the N by Fri night). | Days 5-7 Weather SummaryMostly dry. Warm (max 23°C on Mon morning, min 20°C on Sat afternoon). Winds decreasing (strong winds from the NNW on Sat afternoon, calm by Tue morning). | |||||||||||||||||||
Wed 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | ||||||||||||||
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 | NNW 6 | NNW 7 | NNW 7 | NNW 8 | NNW 8 | NNW 8 | NNW 9 | NNW 8 | NNW 9 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | NNW 8 |
Wave Graph | ||||||||||||||||||||
154 | 150 | 154 | 218 | 163 | 131 | 269 | 412 | 751 | 878 | 987 | 1083 | 708 | 853 | 747 | 576 | 366 | 353 | 256 | 138 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | on | cross-on |
High Tide | 3:38AM2.85m | 3:53PM3.20m | 4:19AM2.88m | 4:35PM3.20m | 4:59AM2.85m | 5:14PM3.09m | 5:38AM2.76m | 5:53PM2.90m | 6:15AM2.62m | 6:32PM2.65m | 6:54AM2.45m | 7:13PM2.39m | ||||||||
Low Tide | 9:29PM-0.05m | 9:37AM0.07m | 10:11PM-0.10m | 10:18AM0.04m | 10:50PM-0.07m | 10:57AM0.08m | 11:28PM0.05m | 11:36AM0.20m | 00:04AM0.23m | 12:15PM0.37m | 00:40AM0.45m | 12:56PM0.58m | 1:18AM0.68m | |||||||
— | — | 6:48 | — | — | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | |
8:37 | — | — | 8:35 | — | — | 8:34 | — | — | 8:32 | — | — | 8:31 | — | — | 8:30 | — | — | 8:29 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 20 | 21 | 21 | 20 | 21 | 21 | 21 | 20 | 20 | 20 | 21 | 22 | 21 | 23 | 22 | 22 | 23 | 24 | 23 |
Feels °C | 19 | 18 | 20 | 20 | 17 | 19 | 18 | 17 | 16 | 15 | 15 | 21 | 21 | 19 | 23 | 21 | 21 | 25 | 25 | 23 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | S 12 | — | S 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 15 | NNW 9 | SW 15 | SSW 16 | NNW 8 | NNW 8 | NNW 8 |
154 | 150 | 154 | 218 | 163 | 130 | 3 | — | 6 | 12 | 11 | 10 | 11 | 9 | 747 | 9 | 26 | 353 | 256 | 138 | |
Swell 2 Height (m) Direction Period (s) | NNW 9 | NNW 10 | NNW 10 | S 13 | — | S 12 | — | — | — | — | — | SW 16 | — | SW 15 | SW 15 | — | S 13 | SSW 16 | SSW 16 | WNW 8 |
8 | 31 | 18 | 3 | — | 3 | — | — | — | — | — | 10 | — | 9 | 8 | — | 3 | 25 | 24 | 6 | |
Swell 3 Height (m) Direction Period (s) | — | — | NW 12 | — | — | — | — | — | — | — | — | — | — | — | SW 18 | — | S 13 | SSW 14 | W 7 | SSW 15 |
— | — | 23 | — | — | — | — | — | — | — | — | — | — | — | 12 | — | 3 | 19 | 4 | 21 | |
Wind waves Height (m) Direction Period (s) | NNW 9 | NNW 5 | NNW 5 | NNW 5 | NNW 6 | NNW 6 | NNW 7 | NNW 7 | NNW 8 | NNW 8 | NNW 8 | NNW 9 | NNW 8 | NNW 9 | — | NNW 9 | NNW 8 | — | SSE 3 | — |
119 | 37 | 28 | 49 | 95 | 131 | 269 | 412 | 751 | 878 | 987 | 1083 | 708 | 853 | — | 576 | 366 | — | 2 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 21 | 14 | 14 | 203 | 21 | 109 | 461 | 222 | 222 | 222 | 115 | 22 | 205 | 22 | 22 | 204 | 20 | 0 | 958 | 20 |
Best forecast wave conditions in Lisboa | ||||||||||||||||||||
Best forecast wave conditions in Portugal | ||||||||||||||||||||
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Information about the Praia das Macas Surf forecast
The above surf forecast table for Praia das Macas provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Praia das Macas can be found by selecting the local surf guide option on the grey menu. Our Praia das Macas 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 das Macas) 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 das Macas 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 das Macas is 9 km (6 miles) from Sintra. If you plan a holiday in Lisboa, look for hotels and other accommodation in Sintra. Sintra has rooms for a wide range of budgets as well as car hire and transport links.











