Surf Forecasts:
Praia das Macas surf forecast from 23 Aug 2026:
- Best quality surf: Friday 28 Aug, 1AM (local time) - 10ft (3.0m), 11s period, WNW swell with cross-onshore winds.
- Most powerful swell: Friday 28 Aug, 4AM (local time) - 11ft (3.5m), 13s period, WNW swell with 4,510 kJ wave energy.
- Next surfable swell (1★+): Tuesday 25 Aug, 7AM (local time) - 5ft (1.5m), 7s period with W 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 7AM. The primary swell is predicted to be 1.5m and 7s period with a secondary swell of 0.1m and 7s. 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 3.5m 13s and forecast to arrive on Friday (Aug 28) at 4AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 7s period and expected on Monday (Aug 24) at 4PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Tue 25th Aug) | 5ft (1.5m) 7s |
| Best Surf | 1AM (Fri 28th Aug) | 10ft (3.0m) 11s |
| Most Powerful | 4AM (Fri 28th Aug) | 11ft (3.5m) 13s |
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 Praia das Macas has in store for us over the next couple of weeks.
Right off the bat, it’s a bit of a slow start. The first few days are looking pretty ordinary with messy winds and poor surf conditions. We’ve got a burst of new swell coming, but it’s going to take a while to clean up. The water is sitting at 67°, which is a bit colder than normal for this time of year, so you might want a thicker wetsuit.
The first real glimmer of hope comes on Tuesday morning, 25th August. We’ve got a 5ft swell from the WNW, and the wind is light and cross-offshore. It’s clean, but the swell energy is only moderate (221). It’s rideable, but nothing to write home about.
Things get seriously interesting on Friday morning, 28th August. The swell is pumping at 10ft from the NW, with a solid 12-second period and a massive combined energy of 2777. That’s a lot of water moving. The wind is a gentle cross-offshore, which is a major plus. But listen, this is a big one. At 10ft, it’s going to be way too big for beginners and only for the experienced crew. This is the standout of the whole forecast. The period is a long 12 seconds, so expect powerful, well-shaped lines, but at a beach break, it might be a bit straight. The morning is the time to be there.
After that, the wind turns onshore again and stays that way for days. We get a bit of a break from the big swell, but it's a long stretch of lumpy, choppy conditions through the end of August and into the first week of September.
Finally, the forecast shows a return to form on Saturday morning, 5th September. The swell is a more manageable 6ft from the NNW, with a light cross-offshore breeze. The energy is moderate (320), and it's looking clean again. It’s a nice solid option after a rough patch.
Then, the absolute cherry on top looks like Sunday morning, 6th September. The swell is 6ft from the NNW, but the wind is forecast to be glassy. That’s right, perfectly calm, glassy conditions. The energy is strong (518), and the forecast says "very good surf conditions." This is the one to circle on your calendar. The 6ft is a bit punchy for a beginner, but for everyone else, this is going to be a dream session.
So, to wrap it up: the first few days are a write-off. Our standout is the big, powerful swell on Friday morning, 28th August, but it's for experts only. The best all-round window for clean, fun waves is the weekend of the 5th and 6th September, with that Sunday morning looking like absolute perfection.
Stay frothy.
Rusty
Short Range ForecastModerate rain (total 14mm), heaviest on Sun night. Warm (max 22°C on Sun afternoon, min 20°C on Mon night). Winds decreasing (strong winds from the S on Sun night, calm by Mon night). | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Wed night. Warm (max 21°C on Wed afternoon, min 18°C on Fri night). Winds decreasing (fresh winds from the W on Wed night, light winds from the NW by Thu night). | |||||||||||||||||||
Sun 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||
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) | W 10 | WSW 9 | WSW 8 | WSW 8 | W 7 | WNW 7 | WNW 7 | WNW 6 | W 6 | WNW 7 | WNW 8 | W 7 | WNW 8 | WNW 11 | NW 12 | NW 11 | NW 10 | NW 9 | NW 9 | NNW 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 630 | 834 | 979 | 730 | 349 | 214 | 124 | 80 | 64 | 197 | 245 | 233 | 634 | 1958 | 2777 | 1429 | 640 | 405 | 349 | 235 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | cross-on | cross-on | on | cross-off | cross | cross-on | on | on | cross-on | on | on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-on |
High Tide | 1:04AM2.05m | 1:21PM2.30m | 1:47AM2.21m | 2:01PM2.49m | 2:23AM2.38m | 2:35PM2.67m | 2:55AM2.53m | 3:07PM2.82m | 3:27AM2.65m | 3:38PM2.93m | 3:58AM2.73m | 4:10PM2.98m | ||||||||
Low Tide | 6:56PM0.90m | 7:05AM0.89m | 7:41PM0.72m | 7:46AM0.71m | 8:17PM0.54m | 8:21AM0.53m | 8:49PM0.37m | 8:53AM0.37m | 9:20PM0.23m | 9:25AM0.25m | 9:51PM0.13m | 9:56AM0.18m | 10:21PM0.08m | |||||||
 |  |  |  |  |  | |  | |  | | | |  | | | | | | | |
 | — | — | 6:58 | — | — | 7:00 | — | — | 7:00 | — | — | 7:01 | — | — | 7:01 | — | — | 7:03 | — | — |
 | 8:22 | — | — | 8:21 | — | — | 8:19 | — | — | 8:17 | — | — | 8:15 | — | — | 8:15 | — | — | 8:13 | — |
mm | — | 7 | 3 | 1 | — | — | — | 1 | 2 | — | 2 | 1 | — | — | — | — | — | — | — | — |
Temp °C | 22 | 21 | 21 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 21 | 21 | 20 | 20 | 20 | 19 | 19 | 19 | 19 |
Feels °C | 18 | 16 | 17 | 20 | 21 | 21 | 21 | 21 | 20 | 19 | 18 | 17 | 17 | 19 | 19 | 18 | 17 | 16 | 15 | 16 |
Swell 1 Height (m) Direction Period (s) | W 10 | N 8 | N 8 | WSW 8 | W 7 | WNW 7 | WNW 7 | WNW 6 | NNW 6 | WNW 7 | WNW 8 | NW 8 | SW 11 | WNW 11 | NW 12 | NW 11 | NW 10 | NW 9 | — | NNW 8 |
| kJ | 630 | 10 | 5 | 730 | 349 | 214 | 124 | 80 | 15 | 197 | 245 | 208 | 5 | 1958 | 2777 | 1429 | 640 | 405 | — | 235 |
Swell 2 Height (m) Direction Period (s) | N 8 | SSW 13 | SW 13 | N 8 | N 8 | N 7 | SW 12 | NW 10 | NW 9 | SW 11 | SW 11 | SW 11 | SW 11 | S 11 | — | — | S 10 | S 10 | — | S 11 |
| kJ | 33 | 17 | 7 | 5 | 4 | 1 | 6 | 4 | 3 | 5 | 5 | 5 | 5 | 2 | — | — | 2 | 2 | — | 2 |
Swell 3 Height (m) Direction Period (s) | SSW 13 | — | — | SW 13 | SW 12 | SW 12 | W 10 | SW 12 | NW 10 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 17 | — | — | 6 | 6 | 6 | 2 | 6 | 4 | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSW 6 | WSW 9 | WSW 8 | SSW 7 | — | — | — | — | W 6 | — | — | W 7 | WNW 8 | — | — | WNW 11 | — | — | NW 9 | — |
| kJ | 130 | 834 | 979 | 107 | — | — | — | — | 64 | — | — | 233 | 634 | — | — | 814 | — | — | 349 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 290 | 127 | 420 | 259 | 14 | 0 | 9 | 127 | 581 | 62 | 62 | 581 | 203 | 14 | 14 | 222 | 14 | 14 | 425 | 120 |
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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