Surf Forecasts:
Praia das Macas surf forecast from 20 Aug 2026:
- Best quality surf: Sunday 23 Aug, 4AM (local time) - 3.5ft (1.0m), 13s period, WNW swell with cross-offshore winds.
- Most powerful swell: Friday 21 Aug, 1PM (local time) - 6.5ft (2.0m), 10s period, NNW swell with 841 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 4AM (local time) - 3.5ft (1.0m), 13s period with WNW 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 Sunday (Aug 23) at 4AM. The primary swell is predicted to be 1.0m and 13s period with a secondary swell of 0.8m and 9s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Praia das Macas in the next 16 days are 2.0m 10s and forecast to arrive on Friday (Aug 21) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Sunday (Aug 23) at 1PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Sun 23rd Aug) | 3.5ft (1.0m) 13s |
| Best Surf | 4AM (Sun 23rd Aug) | 3.5ft (1.0m) 13s |
| Most Powerful | 1PM (Fri 21st Aug) | 6.5ft (2.0m) 10s |
Table - best surf conditions forecast for Praia das Macas over the next 16 days.
The Lowdown
Alright, this is Rusty. Let's have a look at what's on the table for the next couple of weeks.
Alright folks, gotta be straight with you – for a solid week, it’s looking like a total write-off. We're talking from the 20th all the way through to the 27th of August, the surf is pretty much trashed. It's not that there's no swell, but the wind is just completely ruining it. We’ve got moderate to strong cross-onshore winds blowing every day, chewing up any half-decent wave into a choppy, lumpy mess. The energy from the swell is there, sometimes moderate, sometimes strong – like on the 21st afternoon with a combined energy of 843, or the 23rd hitting 811 – but with that wind, it's just not paddle-surfable. You'd be fighting a losing battle.
There's a little glimmer on the morning of the 23rd, that Sunday, where the wind goes cross-offshore and the surf looks clean. The swell is a solid 6ft from the west with an 11-second period, giving moderate energy (811), but because it's so early in the period and the rating is still a 1 out of 10, it’s a marginal call at best. Might be worth a look if you're desperate, but I wouldn't get my hopes up.
The first real standout, and honestly the only window worth getting excited about, comes on the 27th of August, Thursday afternoon. Now this is interesting. We’ve got a 6ft swell rolling in from the northwest with a nice 10-second period. The combined energy jumps up to 1096, which is strong. And the wind is finally blowing directly onshore, which is clean. The forecast calls for clean conditions with a gentle breeze. This is our best bet. It's still a marginal call, but the quality of the swell and the cleaner conditions make it the highlight of the whole forecast. The swell direction from the NW matches the optimum for Praia das Macas, so it should be lining up nicely. The water temp is about average for this time of year.
After that, from the 28th through to the 4th of September, we’re back into the same old story – strong cross-onshore winds and poor surf. There’s plenty of swell around, with heights between 4ft and 6ft, but the wind just won’t let it clean up. It’s a long, frustrating stretch. If you’re a kiter, this whole period looks wild, but for a surfer, it’s a tough run.
So, to wrap it up: don't waste your time until the afternoon of the 27th of August. That Thursday afternoon at Praia das Macas is your one shot at something worthwhile. The rest is a waiting game.
Rusty.
Short Range ForecastMostly dry. Warm (max 21°C on Wed night, min 18°C on Fri night). Winds increasing (light winds from the N on Wed night, fresh winds from the N by Thu afternoon). | Days 4-6 Weather SummaryLight rain (total 9mm), mostly falling on Sun night. Warm (max 22°C on Mon afternoon, min 20°C on Sat night). Winds increasing (light winds from the SSW on Sat night, fresh winds from the SSW by Sun night). | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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 9 | WNW 9 | NNW 7 | NW 11 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | W 11 | WNW 10 | W 9 | W 8 | W 8 | W 7 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | WNW 8 | WNW 8 |
Wave Graph | |||||||||||||||||||||
62 | 61 | 329 | 229 | 831 | 555 | 419 | 312 | 151 | 762 | 424 | 563 | 576 | 464 | 146 | 149 | 113 | 99 | 168 | 313 | 300 | |
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 | on | cross | cross-off | cross-off | cross | cross | cross-on | cross-on | cross-on | cross | cross-on | cross-on | on | cross-on |
High Tide | 8:29AM2.10m | 9:05PM1.94m | 9:44AM1.98m | 10:36PM1.85m | 11:16AM1.99m | 00:04AM1.90m | 12:30PM2.12m | 1:04AM2.05m | 1:21PM2.30m | 1:47AM2.21m | 2:01PM2.49m | 2:23AM2.38m | 2:35PM2.67m | 2:55AM2.53m | |||||||
Low Tide | 2:42PM0.98m | 3:06AM1.07m | 4:10PM1.09m | 4:41AM1.14m | 5:49PM1.05m | 6:08AM1.05m | 6:56PM0.90m | 7:05AM0.89m | 7:41PM0.72m | 7:46AM0.71m | 8:17PM0.54m | 8:21AM0.53m | 8:49PM0.37m | ||||||||
6:54 | — | — | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | 7:00 | — | — | 7:00 | — | — | |
— | 8:25 | — | — | 8:24 | — | — | 8:22 | — | — | 8:22 | — | — | 8:21 | — | — | 8:19 | — | — | 8:17 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 1 | 7 | 1 | — | — | — | — | 3 | 3 | — | 1 |
Temp °C | 21 | 21 | 19 | 19 | 19 | 18 | 19 | 20 | 20 | 21 | 21 | 21 | 21 | 22 | 21 | 21 | 21 | 21 | 20 | 20 | 20 |
Feels °C | 22 | 20 | 14 | 15 | 14 | 14 | 18 | 20 | 20 | 18 | 18 | 19 | 18 | 21 | 21 | 22 | 21 | 21 | 21 | 19 | 19 |
Swell 1 Height (m) Direction Period (s) | WNW 9 | WNW 9 | W 9 | NW 11 | SSW 15 | WNW 9 | NNW 10 | NNW 9 | NNW 9 | W 11 | WNW 10 | W 9 | W 8 | W 8 | W 7 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | SW 11 | WNW 8 |
62 | 61 | 40 | 229 | 21 | 45 | 419 | 312 | 151 | 762 | 424 | 563 | 576 | 464 | 146 | 149 | 113 | 99 | 168 | 5 | 300 | |
Swell 2 Height (m) Direction Period (s) | NNW 5 | NW 11 | SW 15 | WNW 9 | WNW 11 | SSW 14 | W 9 | W 9 | WNW 15 | N 8 | N 8 | NNW 8 | N 8 | N 8 | NW 8 | SW 12 | SW 12 | W 10 | SW 12 | N 14 | NW 13 |
18 | 19 | 9 | 25 | 12 | 18 | 39 | 39 | 73 | 49 | 33 | 19 | 4 | 4 | 111 | 6 | 6 | 2 | 5 | 4 | 7 | |
Swell 3 Height (m) Direction Period (s) | SSW 13 | SSW 13 | SW 12 | SSW 15 | — | NNW 12 | SSW 14 | SSW 14 | WNW 8 | SSW 13 | SSW 13 | SSW 13 | SW 13 | SW 13 | N 7 | N 7 | W 10 | SW 12 | — | — | SW 11 |
17 | 17 | 6 | 21 | — | 14 | 20 | 20 | 23 | 18 | 17 | 17 | 7 | 6 | 4 | 1 | 2 | 6 | — | — | 5 | |
Wind waves Height (m) Direction Period (s) | — | NW 5 | NNW 7 | NNW 7 | NNW 10 | NNW 10 | — | — | — | S 3 | SSW 6 | SSW 5 | — | — | — | — | — | W 6 | — | WNW 8 | — |
— | 11 | 329 | 209 | 831 | 555 | — | — | — | 5 | 97 | 51 | — | — | — | — | — | 28 | — | 313 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 14 | 203 | 285 | 21 | 420 | 15 | 15 | 62 | 1 | 62 | 425 | 62 | 504 | 259 | 21 | 62 | 436 | 62 | 14 | 14 | 62 |
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.











