Surf Forecasts:
Praia das Macas surf forecast from 15 Sep 2026:
- Best quality surf: Thursday 17 Sep, 7AM (local time) - 10ft (3.0m), 10s period, NNW swell with cross-shore winds.
- Most powerful swell: Saturday 19 Sep, 10AM (local time) - 8ft (2.5m), 14s period, NW swell with 2,506 kJ wave energy.
- Next surfable swell (1★+): Thursday 17 Sep, 7AM (local time) - 10ft (3.0m), 10s 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 Thursday (Sep 17) at 7AM. The primary swell is predicted to be 3.0m and 10s period. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Praia das Macas in the next 16 days are 2.5m 14s and forecast to arrive on Saturday (Sep 19) at 10AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 2s period and expected on Saturday (Sep 19) at 10AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Thu 17th Sep) | 10ft (3.0m) 10s |
| Best Surf | 7AM (Thu 17th Sep) | 10ft (3.0m) 10s |
| Most Powerful | 10AM (Sat 19th Sep) | 8ft (2.5m) 14s |
Table - best surf conditions forecast for Praia das Macas over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down what’s happening at Praia das Macas for the next 16 days.
The water temp is about 66°F, which is a bit colder than the average this time of year – nothing crazy, but you’ll notice it if you’re used to warmer.
Right now, the first few days are totally blown out. We’ve got strong north winds, cross and cross-onshore, with messy, short-period swell. The wave energy goes from moderate (127) up to strong (1441), but the quality is zero. Tuesday 15th through Friday 18th September are a no-go. That’s four days of nothing worth paddling for.
Hold on for the morning of Saturday, 19th September. That’s the standout. We’re talking 8ft of NW groundswell with a very long 14-second period (combined energy 2514 – that’s strong). The wind shifts offshore from the ESE at just 6 mph. That means clean, powerful, well-shaped waves. This will be for experienced surfers only – it’s a bit big for beginners. And this spot does see crowds sometimes, so get there early.
Sunday 20th September morning is still quality – 6ft NW, 12 seconds, offshore wind, solid energy (815). Not as punchy as Saturday, but still very rideable.
Monday 21st morning is smaller at 4ft, offshore, 10-second period. Clean but mellow.
Tuesday 22nd September morning is worth a mention too – only 4ft, but glassy with a 12-second period and moderate energy (403). Very smooth.
Wednesday through Friday of that week? Onshore winds and small, messy surf. Not recommended.
The weekend of 26th-27th September brings a new bump – up to 7ft from the W with a 15-second period (strong energy 1948) – but again the north wind is howling at 22 mph cross-onshore. Lumpy and windy. That’s more for the kite crew than paddle surfers.
The real score is that Saturday 19th and Sunday 20th September mornings. The rest of the outlook is quiet or windy.
Rusty.
Short Range ForecastMostly dry. Warm (max 20°C on Thu morning, min 17°C on Tue night). Mainly near gales. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Sun morning, min 19°C on Fri morning). Winds decreasing (fresh winds from the N on Fri afternoon, calm by Sat night). | ||||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | |||||||||||||||
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 10 | NNW 5 | NNW 7 | NNW 9 | NNW 9 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | NNW 9 | NNW 8 | NW 15 | NW 14 | NW 13 | NW 13 | NW 12 | NW 11 | NW 11 | NW 10 | NW 14 | NW 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 74 | 92 | 449 | 1441 | 1569 | 2024 | 1203 | 1088 | 1249 | 977 | 665 | 1832 | 2506 | 1589 | 1112 | 808 | 582 | 408 | 217 | 218 | 292 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross | cross | cross-on | cross | off | cross-on | cross | off | on | cross-on | off | cross-on | cross |
High Tide | 5:54PM2.57m | 6:10AM2.50m | 6:31PM2.32m | 6:48AM2.31m | 7:14PM2.08m | 7:37AM2.11m | 8:15PM1.88m | 8:51AM1.96m | 9:54PM1.78m | 10:36AM1.95m | 11:34PM1.85m | 11:57AM2.08m | 00:34AM2.01m | ||||||||
Low Tide | 11:40AM0.36m | 11:55PM0.49m | 12:17PM0.56m | 00:29AM0.71m | 12:58PM0.78m | 1:10AM0.93m | 1:54PM0.99m | 2:10AM1.11m | 3:24PM1.12m | 3:52AM1.20m | 5:17PM1.08m | 5:34AM1.10m | 6:26PM0.92m | ||||||||
 | |  | | | | | | | | | | | | | | | | | | | |
 | 7:18 | — | — | 7:18 | — | — | 7:20 | — | — | 7:20 | — | — | 7:22 | — | — | 7:22 | — | — | 7:24 | — | — |
 | — | 7:46 | — | — | 7:45 | — | — | 7:44 | — | — | 7:42 | — | — | 7:39 | — | — | 7:38 | — | — | 7:37 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 19 | 18 | 17 | 19 | 19 | 20 | 19 | 18 | 20 | 19 | 23 | 25 | 24 | 25 | 28 | 26 | 26 | 26 | 25 | 25 |
Feels °C | 15 | 15 | 12 | 10 | 11 | 12 | 13 | 13 | 11 | 16 | 15 | 20 | 23 | 21 | 24 | 27 | 23 | 22 | 25 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | NW 10 | NW 11 | WNW 10 | S 13 | SW 13 | S 12 | NNW 10 | S 12 | SW 16 | NW 16 | NW 14 | NW 15 | NW 14 | NW 13 | NW 13 | NW 12 | NW 11 | NW 11 | NW 10 | NW 9 | NW 12 |
| kJ | 74 | 33 | 85 | 3 | 6 | 3 | 1203 | 3 | 10 | 10 | 195 | 1832 | 2506 | 1589 | 1112 | 808 | 582 | 408 | 217 | 144 | 292 |
Swell 2 Height (m) Direction Period (s) | WNW 8 | WNW 8 | S 13 | S 13 | — | S 12 | S 12 | S 16 | S 11 | SW 15 | NW 19 | SW 14 | SW 14 | SW 13 | S 13 | S 10 | S 11 | S 6 | NW 15 | NW 14 | NW 9 |
| kJ | 22 | 13 | 3 | 3 | — | 3 | 3 | 5 | 2 | 9 | 92 | 8 | 8 | 7 | 3 | 2 | 2 | 1 | 77 | 218 | 114 |
Swell 3 Height (m) Direction Period (s) | WNW 12 | S 13 | — | — | — | — | — | — | — | S 11 | SW 14 | S 14 | — | — | SW 13 | SW 13 | S 13 | S 12 | SSE 11 | S 11 | S 5 |
| kJ | 14 | 4 | — | — | — | — | — | — | — | 2 | 8 | 4 | — | — | 7 | 7 | 3 | 3 | 23 | 9 | 2 |
Wind waves Height (m) Direction Period (s) | NNW 4 | NNW 5 | NNW 7 | NNW 9 | NNW 9 | NNW 10 | — | NNW 9 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | NE 2 | — | — | — | NW 3 | — | — | — | NW 3 |
| kJ | 17 | 92 | 449 | 1441 | 1569 | 2024 | — | 1088 | 1249 | 977 | 665 | 547 | 1 | — | — | — | 2 | — | — | — | 3 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 14 | 617 | 449 | 439 | 604 | 109 | 22 | 618 | 109 | 22 | 204 | 14 | 0 | 58 | 8 | 0 | 172 | 14 | 0 | 62 | 14 |
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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