
Surf Forecasts:
Praia das Macas surf forecast from 9 Sep 2026:
- Best quality surf: Sunday 13 Sep, 7AM (local time) - 2.5ft (0.7m), 14s period, NW swell with glassy winds.
- Most powerful swell: Thursday 10 Sep, 7PM (local time) - 6ft (1.9m), 10s period, NNW swell with 763 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 7AM (local time) - 2.5ft (0.7m), 14s period with NW 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 (Sep 13) at 7AM. The primary swell is predicted to be 0.7m and 14s period with a secondary swell of 0.9m 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 1.9m 10s and forecast to arrive on Thursday (Sep 10) at 7PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.1m 11s period and expected on Sunday (Sep 13) at 10PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sun 13th Sep) | 2.5ft (0.7m) 14s |
| Best Surf | 7AM (Sun 13th Sep) | 2.5ft (0.7m) 14s |
| Most Powerful | 7PM (Thu 10th Sep) | 6ft (1.9m) 10s |
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 couple of weeks are a bit of a mixed bag, but there are a couple of windows where it’s gonna be worth paddling out at Praia das Macas. The surf is gonna be on offer right from Wednesday, but you’re gonna have to be patient through the first stretch of it.
The early part of the forecast, starting Wednesday the 9th, is pretty scrappy. We’ve got a northwest swell filling in, but the wind is gonna be all over it – mostly cross-onshore and lumpy. The swell energy is moderate at best, starting around 311 and building to 574 by Thursday, but it’s not going to do you any favors with that wind. Thursday the 10th and Friday the 11th are still locked into that cross-onshore flow, with the swell hovering around 5.9ft and then dropping back. The period is short, around 7-8 seconds, which just adds to the mess. You’re looking at a few days of chop with not a lot of hope.
Saturday the 12th sees the wind ease off a touch, but it’s a cross-shore breeze and the swell has faded to under 3ft, with a weak energy reading of 123. It’s small and crumbly, not doing much. We’ve got a few days of this poor quality stuff to get through.
Now, here’s where it gets interesting. Come Sunday morning, the 13th, the wind finally plays ball – we get a light offshore breeze out of the southeast, and that swell, though only 3ft, has a proper long period of 13 seconds. The energy is still moderate at 389, but that clean, lined-up feel should be there. It’s still not big, but the glassy conditions are a massive plus. This carries into Monday the 14th, which honestly looks like one of the better windows early on. We’ve got a dead glassy morning with a 3.6ft NW swell and a period of 11 seconds. It's clean, it’s super light, and the water temp is sitting at 66.4°, which is a bit colder than normal for this time of year – 2.7° cooler – so you might want a slightly thicker suit.
After that little clean window, we slide back into the onshore slop from Tuesday the 15th through to the weekend of the 20th. The swell drops right off, the wind gets messy again, and we’re back to poor conditions with moderate cross-onshore breezes.
But hold on, because the real standout for this whole stretch looks like it’s brewing for a week from Monday. On Monday the 21st, the swell jumps up to a solid 8.2ft with a moderate energy reading of 1092. The wind is cross, but the size is there. However, with the period dropping to 9 seconds, it’s a bit of a raw power swell. That sets the table for Tuesday the 22nd, which is the big one. The forecast is calling for a hefty 9.8ft of northwest swell, with a strong energy reading of 1544. This is expert territory, way overhead and powerful. The light cross-shore wind is favorable, but honestly, the size is the headline. This is the standout push of the period.
The morning after, Wednesday the 23rd, looks like the smart play. The swell eases to a still-chunky 6.2ft, the wind goes glassy out of the NNE, and the forecast is calling for very good surf. The energy is still strong at 599. After that, we’re looking at Thursday the 24th with a long-period NW swell at 5.6ft, but it gets a bit more cross-on again. That Tuesday big-wave window and the glassy Wednesday morning are the two dates to circle. The long-range stuff is promising but less certain, so keep an eye on it.
Beach breaks here might see those long-period swells (11+ seconds) breaking a bit straight, so if you can find a sandbar that’s holding, you’ll be in for a treat.
Short Range ForecastMostly dry. Warm (max 21°C on Fri morning, min 18°C on Wed morning). Winds decreasing (strong winds from the NNW on Wed night, light winds from the N by Fri night). | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Sun morning, min 22°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | |||||||||||||||
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 8 | NNW 7 | NNW 8 | NNW 8 | NNW 8 | NNW 10 | NNW 7 | NNW 7 | NNW 6 | NNW 6 | NNW 6 | NNW 8 | NW 13 | NW 12 | NW 12 | NW 11 | NW 10 | NW 9 | NW 10 | NNW 4 | WNW 11 |
Wave Graph | |||||||||||||||||||||
307 | 406 | 536 | 382 | 263 | 624 | 158 | 158 | 100 | 62 | 80 | 110 | 295 | 479 | 480 | 297 | 208 | 141 | 76 | 42 | 69 | |
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 | cross | cross-on | cross | cross | cross-on | cross | off | on | cross-on | glassy | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 2:09PM2.95m | 2:38AM2.76m | 2:52PM3.09m | 3:17AM2.87m | 3:31PM3.15m | 3:54AM2.92m | 4:08PM3.11m | 4:29AM2.90m | 4:44PM2.99m | 5:03AM2.81m | 5:19PM2.80m | 5:36AM2.68m | 5:54PM2.57m | ||||||||
Low Tide | 8:29PM0.07m | 8:38AM0.17m | 9:09PM-0.04m | 9:17AM0.06m | 9:45PM-0.07m | 9:54AM0.03m | 10:19PM-0.02m | 10:30AM0.08m | 10:52PM0.10m | 11:05AM0.19m | 11:23PM0.28m | 11:40AM0.36m | 11:55PM0.49m | ||||||||
7:13 | — | — | 7:13 | — | — | 7:15 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:18 | — | — | |
— | 7:55 | — | — | 7:54 | — | — | 7:52 | — | — | 7:52 | — | — | 7:50 | — | — | 7:47 | — | — | 7:46 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 18 | 18 | 20 | 19 | 18 | 21 | 20 | 20 | 24 | 24 | 25 | 27 | 25 | 26 | 24 | 25 | 23 | 22 | 21 | 18 |
Feels °C | 13 | 12 | 12 | 16 | 15 | 13 | 19 | 18 | 17 | 23 | 22 | 22 | 26 | 23 | 23 | 24 | 23 | 21 | 20 | 19 | 14 |
Swell 1 Height (m) Direction Period (s) | W 13 | NW 12 | NW 13 | NW 11 | NNW 11 | W 7 | NNW 7 | W 7 | NNW 9 | NNW 6 | WNW 9 | NNW 8 | NW 13 | NW 12 | NW 12 | NW 11 | NW 10 | NW 9 | NW 10 | WNW 8 | WNW 11 |
4 | 6 | 42 | 179 | 196 | 9 | 158 | 4 | 17 | 62 | 69 | 107 | 295 | 479 | 480 | 297 | 208 | 141 | 76 | 22 | 69 | |
Swell 2 Height (m) Direction Period (s) | — | N 15 | — | WNW 8 | WNW 7 | W 10 | NNW 10 | W 8 | W 7 | WNW 10 | NW 18 | WNW 9 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | S 11 | N 7 | WNW 8 | WNW 12 | NW 9 |
— | 4 | — | 13 | 10 | 2 | 105 | 1 | 4 | 55 | 12 | 64 | 54 | 37 | 40 | 25 | 2 | 1 | 22 | 29 | 20 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | W 7 | — | W 11 | N 9 | S 12 | NW 15 | W 9 | S 12 | S 11 | S 11 | — | S 11 | NW 13 | S 13 | WNW 8 |
— | — | — | — | — | — | 4 | — | 2 | 6 | 3 | 110 | 40 | 3 | 2 | 2 | — | 2 | 7 | 4 | 11 | |
Wind waves Height (m) Direction Period (s) | NNW 8 | NNW 7 | NNW 8 | NNW 8 | NNW 8 | NNW 10 | — | NNW 7 | NNW 6 | — | NNW 6 | — | — | — | — | — | NNW 7 | N 3 | NNW 4 | NNW 4 | NNW 5 |
307 | 406 | 536 | 382 | 263 | 624 | — | 158 | 100 | — | 80 | — | — | — | — | — | 18 | 6 | 10 | 42 | 51 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 290 | 449 | 115 | 14 | 468 | 35 | 20 | 204 | 14 | 1 | 182 | 14 | 0 | 14 | 14 | 0 | 14 | 14 | 14 | 439 | 109 |
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.










