Surf Forecasts:
Praia das Macas surf forecast from 19 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 10AM (local time) - 3.5ft (1.0m), 7s period, NNW swell with glassy winds.
- Most powerful swell: Friday 21 Aug, 1PM (local time) - 7ft (2.1m), 10s period, NNW swell with 917 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 10AM (local time) - 3.5ft (1.0m), 7s 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 25) at 10AM. The primary swell is predicted to be 1.0m and 7s period with a secondary swell of 0.2m and 8s. 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 2.1m 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 0.2m 15s period and expected on Thursday (Aug 20) at 10PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Tue 25th Aug) | 3.5ft (1.0m) 7s |
| Best Surf | 10AM (Tue 25th Aug) | 3.5ft (1.0m) 7s |
| Most Powerful | 1PM (Fri 21st Aug) | 7ft (2.1m) 10s |
Table - best surf conditions forecast for Praia das Macas over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what's cooking for Praia das Macas over the next couple of weeks.
Honestly, it’s a bit of a rough stretch. The forecast is loaded with onshore and cross-onshore winds that are going to mess things up. The swell energy isn't too shabby at times, with moderate wave energy readings (between 100 and 999), but the wind just kills the quality. For the first week and a half, from Wednesday the 19th all the way through to the end of August, it’s mostly a write-off. There’s a gap of several days with no real recommendations because conditions are just poor.
The only real glimmer of hope comes on Tuesday, the 25th of August, in the morning. The wind will go glassy, with a slight air from the WSW at 3 mph. The swell is small, about 3 ft from the NNW, but that glassy condition is a major positive, meaning it’ll be clean. The water temp is sitting around 69°, which is pretty normal for this time of year. That morning is the one standout window – it’s not big or powerful, but it’ll be the cleanest you’ll see all forecast period. The rest of the time, it's a battle against onshore slop and choppy conditions.
For the second week, things don't improve much. The swell hangs around but the cross-onshore winds persist. A big pulse of energy shows up on Monday the 31st of August afternoon, with 7 ft of NW swell and combined energy of 824 (moderate), but it’s straight onshore from the west at 9 mph, making it a messy, closed-out affair. That’s one for the experts only, and even then, it won't be pretty. Overall, keep your expectations low for Praia das Macas over the next 16 days.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Wed morning, min 18°C on Fri night). Winds increasing (light winds from the NNW on Wed night, strong winds from the NNW by Thu afternoon). | Days 4-6 Weather SummaryLight rain (total 5mm), mostly falling on Sat night. Warm (max 20°C on Sat morning, min 18°C on Sat night). Winds decreasing (fresh winds from the NNW on Sun afternoon, light winds from the NW by Mon night). | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 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) | NNW 7 | NNW 7 | WNW 10 | WNW 9 | WNW 9 | NNW 7 | NNW 7 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NW 7 | NW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 94 | 70 | 51 | 62 | 61 | 362 | 279 | 855 | 782 | 603 | 415 | 257 | 256 | 306 | 284 | 208 | 183 | 164 | 91 | 63 | 35 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | on | cross-on | cross-on | glassy | cross-on | cross-on |
High Tide | 8:01PM2.14m | 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 | ||||||||
Low Tide | 1:42PM0.79m | 2:03AM0.90m | 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 | ||||||||
 | |  |  | | | | | | | |  | | | |  | |  | | | | |
 | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | 7:00 | — | — |
 | — | 8:28 | — | — | 8:25 | — | — | 8:24 | — | — | 8:22 | — | — | 8:22 | — | — | 8:21 | — | — | 8:19 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — | — | 2 | — | — | — | — | 2 |
Temp °C | 22 | 22 | 21 | 21 | 20 | 19 | 19 | 19 | 19 | 20 | 20 | 19 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 21 | 21 |
Feels °C | 23 | 23 | 21 | 21 | 17 | 13 | 15 | 14 | 16 | 18 | 18 | 15 | 20 | 19 | 17 | 17 | 18 | 19 | 21 | 20 | 19 |
Swell 1 Height (m) Direction Period (s) | NNW 7 | NNW 7 | NNW 6 | NNW 5 | WNW 9 | W 9 | NW 11 | SSW 15 | NNW 12 | WNW 9 | WNW 9 | NNW 9 | NNW 8 | NNW 8 | W 6 | WSW 6 | WSW 5 | NNW 7 | NNW 7 | W 10 | NW 6 |
| kJ | 94 | 70 | 44 | 19 | 61 | 39 | 229 | 21 | 14 | 26 | 25 | 257 | 256 | 306 | 13 | 3 | 3 | 164 | 91 | 2 | 35 |
Swell 2 Height (m) Direction Period (s) | WNW 8 | WNW 8 | WNW 10 | WNW 9 | NW 11 | SSW 15 | WNW 9 | W 11 | SSW 14 | SSW 14 | SSW 14 | WNW 8 | WNW 8 | W 8 | SSW 13 | SW 13 | SW 13 | SW 12 | W 8 | SW 12 | W 10 |
| kJ | 12 | 12 | 51 | 62 | 19 | 21 | 25 | 10 | 18 | 20 | 20 | 23 | 51 | 41 | 17 | 7 | 6 | 6 | 4 | 6 | 2 |
Swell 3 Height (m) Direction Period (s) | SSW 14 | WNW 10 | SSW 4 | S 4 | SSW 13 | NNW 13 | SSW 15 | — | NNW 12 | SSW 14 | — | SSW 14 | SSW 13 | SSW 13 | — | W 8 | SW 13 | SW 5 | SW 12 | SW 12 | W 7 |
| kJ | 20 | 21 | 2 | 1 | 17 | 16 | 21 | — | 14 | 20 | — | 19 | 18 | 17 | — | 1 | 6 | 1 | 6 | 6 | 1 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NW 5 | NNW 7 | NNW 7 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | — | — | — | NNW 8 | NNW 7 | NNW 7 | — | — | NW 7 | WNW 4 |
| kJ | — | — | — | — | 23 | 362 | 279 | 855 | 782 | 603 | 415 | — | — | — | 284 | 208 | 183 | — | — | 63 | 11 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 186 | 14 | 15 | 203 | 259 | 222 | 618 | 222 | 160 | 206 | 115 | 9 | 15 | 22 | 504 | 507 | 20 | 0 | 436 | 409 |
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.
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