Surf Forecasts:
Praia das Macas surf forecast from 21 Aug 2026:
- Best quality surf: Sunday 23 Aug, 1AM (local time) - 5.5ft (1.7m), 13s period, WNW swell with cross-offshore winds.
- Most powerful swell: Sunday 23 Aug, 4AM (local time) - 7ft (2.1m), 12s period, W swell with 1,290 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 1AM (local time) - 5.5ft (1.7m), 13s period with WNW 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 (Aug 23) at 1AM. The primary swell is predicted to be 1.7m and 13s period with a secondary swell of 0.9m and 9s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Praia das Macas in the next 16 days are 2.1m 12s and forecast to arrive on Sunday (Aug 23) at 4AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 6s period and expected on Sunday (Aug 23) at 4PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sun 23rd Aug) | 5.5ft (1.7m) 13s |
| Best Surf | 1AM (Sun 23rd Aug) | 5.5ft (1.7m) 13s |
| Most Powerful | 4AM (Sun 23rd Aug) | 7ft (2.1m) 12s |
Table - best surf conditions forecast for Praia das Macas over the next 16 days.
The Lowdown
Alright, mates, Rusty again, with the same outlook but in the old-school numbers for those who think in feet.
Let’s be real about Praia das Macas. This forecast is a tough one to read. We’re looking at a solid stretch of poor conditions, and the wind is the main culprit. It’s gonna be cross-on or onshore for the vast majority of the next two weeks, and it’s got enough kick to wreck any chance of clean surf. We’re talking about at least a full week of not much to get excited about.
Startin’ with the immediate. Friday, 21st August is a total washout. There’s swell – a 3ft NW swell in the morning (477 weak-to-moderate energy) building to 7ft from the NNW in the arvo (775 moderate energy) – but the wind is a fresh 30 km/h cross-on, and the reports say "lumpy" and "poor". No go. Saturday morning, 22nd August, shows a small window with a 4ft NNW swell and a light offshore from the WNW, but it’s flagged as "marginal" and the tide might be an issue. The energy is a moderate 385. The arvo goes cross-shore and choppy. Sunday the 23rd has some clean-ish cross-off wind from the SSE, but it’s blowin’ 35 km/h. The swell is 7ft from the west (990 moderate energy) – that wind is just too strong to make it fun.
Then we hit a dead zone. From Monday 24th August all the way through to Thursday 3rd September, every single session is "poor surf conditions". The wind is relentless – fresh cross-ons, strong breezes, chop and lump. Swell sizes bounce around from 2ft up to 8ft, but it’s all ruined by the wind. The water temp is a normal 69°, so you won’t freeze while you’re gettin’ blown off your board.
There is one date that stands out, but it’s a long way off and you gotta be careful with it. On Friday, 4th September, the swell picks up to 7ft from the NW in the morning and 7ft from the NNW in the arvo. The combined energy is strong (592 and 666). But, the wind is a fresh 30-35 km/h cross-on, makin’ it lumpy again. This is strictly for the experienced crew due to the size (over 7ft) and the messy conditions. Saturday the 5th is the same story, with 7ft swell but cross-on wind.
So, the bottom line: there is no standout session. The best you’re gonna get is probably that brief moment on Saturday morning, 22nd August, where a light offshore and a 4ft NNW swell could give you a few clean-ish, smaller waves for the beginners, but it’s a gamble. Everything else is a fight with the wind. For a beach break like this, the constant cross-onshore wind makes it look more like a kite-surfing spot than a paddle-surfing one for most of the period. Keep an eye on that 4th-5th September window, but don’t get your hopes up. The pattern is set poor for a while.
Rusty.
Short Range ForecastHeavy rain (total 49mm), heaviest during Sun morning. Warm (max 22°C on Sun afternoon, min 18°C on Fri night). Winds increasing (light winds from the WNW on Sat morning, fresh winds from the SSW by Sun night). | Days 4-6 Weather SummaryLight rain (total 6mm), mostly falling on Wed morning. Warm (max 21°C on Mon morning, min 20°C on Mon night). Winds decreasing (fresh winds from the SSW on Mon morning, light winds from the WSW by Mon night). | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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 11 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | WNW 13 | W 11 | W 10 | WSW 9 | WSW 8 | W 9 | W 8 | W 7 | WNW 7 | WNW 7 | WNW 6 | WNW 7 | WNW 8 | NW 8 | NW 8 | NW 8 |
Wave Graph | |||||||||||||||||||||
229 | 763 | 500 | 346 | 253 | 1058 | 941 | 520 | 660 | 798 | 1198 | 503 | 203 | 143 | 85 | 129 | 157 | 453 | 338 | 297 | 322 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | on | cross | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross | cross | cross-on | on | on | on | cross-on | cross-on | cross-on |
High Tide | 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 | 2:35PM2.67m | 2:55AM2.53m | 3:07PM2.82m | 3:27AM2.65m | ||||||||
Low Tide | 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 | 8:21AM0.53m | 8:49PM0.37m | 8:53AM0.37m | 9:20PM0.23m | ||||||||
6:56 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | 7:00 | — | — | 7:00 | — | — | 7:01 | — | — | |
— | 8:24 | — | — | 8:22 | — | — | 8:22 | — | — | 8:21 | — | — | 8:19 | — | — | 8:17 | — | — | 8:15 | — | |
mm | — | — | — | — | — | — | 24 | 12 | 13 | 2 | 1 | — | — | — | 1 | 2 | — | — | — | — | — |
Temp °C | 19 | 19 | 19 | 19 | 20 | 20 | 20 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 19 |
Feels °C | 15 | 14 | 16 | 18 | 18 | 20 | 16 | 20 | 18 | 17 | 18 | 21 | 22 | 21 | 22 | 21 | 20 | 18 | 18 | 17 | 17 |
Swell 1 Height (m) Direction Period (s) | NW 11 | SSW 15 | WNW 9 | NNW 10 | NNW 9 | WNW 13 | W 11 | W 10 | WSW 9 | N 8 | N 8 | W 8 | W 7 | WNW 7 | WNW 7 | SW 12 | SW 11 | WNW 8 | NW 8 | SW 11 | NW 14 |
229 | 21 | 45 | 346 | 253 | 1058 | 941 | 520 | 660 | 10 | 5 | 503 | 203 | 143 | 85 | 5 | 5 | 453 | 338 | 5 | 7 | |
Swell 2 Height (m) Direction Period (s) | WNW 9 | WNW 11 | SSW 14 | W 9 | W 9 | NNW 9 | N 8 | N 8 | NNW 8 | SW 13 | SW 13 | N 8 | N 7 | SW 12 | NW 10 | SW 12 | — | SW 11 | SW 11 | NW 14 | SW 11 |
26 | 12 | 18 | 39 | 39 | 113 | 49 | 33 | 12 | 7 | 6 | 10 | 4 | 6 | 4 | 5 | — | 5 | 5 | 8 | 4 | |
Swell 3 Height (m) Direction Period (s) | SSW 15 | — | NNW 12 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | — | — | SW 12 | SW 12 | N 7 | SW 12 | — | — | — | — | — | — |
21 | — | 14 | 20 | 20 | 19 | 18 | 17 | 17 | — | — | 6 | 6 | 1 | 6 | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NNW 7 | NNW 10 | NNW 10 | — | — | — | SSE 4 | S 6 | S 5 | WSW 8 | W 9 | — | — | — | — | WNW 6 | WNW 7 | — | — | NW 8 | NW 8 |
222 | 763 | 500 | — | — | — | 21 | 149 | 59 | 798 | 1198 | — | — | — | — | 129 | 157 | — | — | 297 | 322 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 15 | 420 | 115 | 15 | 203 | 0 | 127 | 1 | 127 | 426 | 259 | 21 | 1 | 1 | 62 | 14 | 203 | 16 | 21 | 21 | 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.











