Surf Forecasts:
Praia das Macas surf forecast from 11 Aug 2026:
- Most powerful swell: Tuesday 18 Aug, 7AM (local time) - 7.5ft (2.3m), 9s period, NNW swell with 829 kJ wave energy.
Best Forecast Surf Conditions for Praia das Macas this week:
The most powerful waves expected at Praia das Macas in the next 16 days are 2.3m 9s and forecast to arrive on Tuesday (Aug 18) at 7AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 16s period and expected on Monday (Aug 17) at 10PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7AM (Tue 18th Aug) | 7.5ft (2.3m) 9s |
Table - best surf conditions forecast for Praia das Macas over the next 16 days.
The Lowdown
Alright, Rusty here, lookin' at the charts for the next couple of weeks. Honestly, the first seven days are a write-off. We’ve got a relentless run of onshore winds whipping across the water, and the waves are just all over the shop – bumpy, lumpy, choppy... nothin' worth paddling out for. You'd be fighting a losing battle out there. It's not until Tuesday the 18th of August that things finally start to look interesting.
The main spot we’re watching is Praia das Macas. It’s a consistent, exposed beach break that’s usually opt for beginners, but don't let that fool you. The standout session pops up on the morning of Tuesday the 18th. We’ve got a clean 8ft swell rollin’ in from the NNW, with a gentle 9 mph ENE breeze blowin’ cross-offshore. That’s the kind of wind that’ll groom the waves, not mess ‘em up. The combined energy is strong at 952, so there’s plenty of push in the water. Because the wind’s gonna be glassy in the morning, the sets should be holding up nicely with that 9-second period. Just a heads up, the crowd factor says "sometimes," so don't expect to have it all to yourself if the conditions are as good as they look.
Wednesday morning the 19th is a bit of a toss-up. The swell hangs in at 6ft from the NNW, but the wind switches to a cross-shore breeze from the NNE at 9 mph, so it’s gonna be a bit scratchy. The energy is still moderate at 545, but you’ll have to work for the clean ones.
Now, if you can wait even longer, Thursday morning the 20th could be a sneaky good one. The swell eases a touch to 6ft from the NNW, but the wind? Absolutely glassy – flat calm at 0 mph. When you get a glassy morning with a bit of swell, it’s like the ocean is saying sorry for the crap week before. The combined energy is moderate at 440, so the waves might not be as powerful, but they’ll be perfectly smooth.
After that, it gets a bit messy again through to the end of the window. Friday the 21st pumps up to 10ft, but it’s accompanied by a strong 19 mph cross-onshore wind, so that’s strictly for the experts or maybe the kite crew. For the rest of us, the 18th morning is the clear winner here. Keep an eye on that one.
Rusty.
Short Range ForecastMostly dry. Warm (max 21°C on Tue morning, min 20°C on Mon night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Fri morning, min 20°C on Thu night). Mainly strong winds. | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
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 12 | NNW 5 | W 10 | WNW 10 | NNW 9 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | NNW 7 | NNW 7 | NNW 7 | NNW 8 | NW 8 | NNW 8 | NNW 9 | NNW 8 | NNW 9 | NNW 9 | NNW 9 | NNW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 39 | 52 | 71 | 120 | 188 | 154 | 154 | 218 | 163 | 178 | 302 | 378 | 532 | 515 | 651 | 601 | 455 | 386 | 486 | 486 | 563 |
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 | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 2:22PM2.93m | 2:53AM2.75m | 3:10PM3.11m | 3:38AM2.85m | 3:53PM3.20m | 4:19AM2.88m | 4:35PM3.20m | 4:59AM2.85m | 5:14PM3.09m | 5:38AM2.76m | 5:53PM2.90m | 6:15AM2.62m | 6:32PM2.65m | ||||||||
Low Tide | 8:07AM0.35m | 8:43PM0.09m | 8:54AM0.18m | 9:29PM-0.05m | 9:37AM0.07m | 10:11PM-0.10m | 10:18AM0.04m | 10:50PM-0.07m | 10:57AM0.08m | 11:28PM0.05m | 11:36AM0.20m | 00:04AM0.23m | 12:15PM0.37m | 00:40AM0.45m | |||||||
 | |  | | | | | | | | |  |  | | |  | | |  |  |  | |
 | 6:47 | — | — | 6:48 | — | — | 6:48 | — | — | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:52 | — | — |
 | — | 8:37 | — | — | 8:37 | — | — | 8:35 | — | — | 8:34 | — | — | 8:32 | — | — | 8:31 | — | — | 8:30 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 5 |
Temp °C | 21 | 21 | 20 | 21 | 21 | 20 | 21 | 21 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 |
Feels °C | 20 | 19 | 18 | 20 | 19 | 17 | 20 | 19 | 16 | 18 | 17 | 18 | 18 | 18 | 17 | 20 | 19 | 17 | 17 | 15 | 14 |
Swell 1 Height (m) Direction Period (s) | NW 12 | WNW 11 | W 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | S 12 | — | NW 10 | SW 18 | SW 17 | NNW 9 | NNW 8 | NNW 9 | NNW 9 | SW 15 | SSW 16 |
| kJ | 39 | 40 | 71 | 120 | 154 | 154 | 154 | 218 | 163 | 130 | 3 | — | 16 | 12 | 11 | 601 | 455 | 386 | 486 | 9 | 26 |
Swell 2 Height (m) Direction Period (s) | WNW 10 | NW 12 | NNW 10 | NNW 10 | — | — | NNW 10 | S 13 | — | S 12 | — | — | S 18 | — | — | SW 16 | SW 16 | SW 15 | SW 15 | SW 11 | SW 10 |
| kJ | 19 | 35 | 40 | 35 | — | — | 18 | 3 | — | 3 | — | — | 6 | — | — | 10 | 11 | 9 | 8 | 5 | 4 |
Swell 3 Height (m) Direction Period (s) | NNW 9 | S 11 | — | — | — | — | NW 12 | — | — | — | — | — | — | — | — | — | — | — | SW 18 | SW 11 | SW 13 |
| kJ | 8 | 2 | — | — | — | — | 23 | — | — | — | — | — | — | — | — | — | — | — | 12 | 5 | 7 |
Wind waves Height (m) Direction Period (s) | NW 5 | NNW 5 | NNW 5 | NNW 5 | NNW 9 | NNW 5 | NNW 5 | NNW 6 | NNW 6 | NNW 7 | NNW 7 | NNW 7 | NNW 8 | NW 8 | NNW 8 | — | — | — | — | NNW 9 | NNW 9 |
| kJ | 39 | 52 | 57 | 37 | 188 | 67 | 42 | 94 | 140 | 178 | 302 | 378 | 532 | 515 | 651 | — | — | — | — | 486 | 563 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 160 | 420 | 15 | 14 | 21 | 15 | 14 | 203 | 21 | 109 | 584 | 222 | 213 | 597 | 129 | 120 | 203 | 254 | 205 | 568 | 156 |
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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