Surf Forecasts:
Praia das Macas surf forecast from 13 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: Thursday 17 Sep, 4AM (local time) - 10ft (3.0m), 10s period, NNW swell with 1,697 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 7AM (local time) - 2ft (0.6m), 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 0.6m 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 3.0m 10s and forecast to arrive on Thursday (Sep 17) 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 0.1m 10s period and expected on Sunday (Sep 13) at 7PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sun 13th Sep) | 2ft (0.6m) 14s |
| Best Surf | 7AM (Thu 17th Sep) | 10ft (3.0m) 10s |
| Most Powerful | 4AM (Thu 17th Sep) | 10ft (3.0m) 10s |
Table - best surf conditions forecast for Praia das Macas over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s break down what Praia das Macas has in store over the next couple of weeks.
We kick things off Sunday the 13th with a clean 3ft NW groundswell, 13-second period, and a light cross-offshore breeze from the SE. The water’s tidy, and the combined energy is moderate (339). Sunday morning is your window.
Sunday afternoon, the wind swings onshore from the WNW and the surf goes to crap.
Monday the 14th morning is a beauty. Swell drops to 3ft from the NW, 11-second period, and the wind is glassy from the SSE. That’s as clean as it gets. Energy is moderate (274). Perfect for beginners or just a cruisy session. Monday morning is a standout.
After that, the wind turns nasty. From Tuesday the 15th through Thursday the 17th, it’s blowing from the NNW and north, cross-shore and cross-onshore, making a mess of things. Swell builds to 8ft to 10ft by Wednesday, with energy readings over 1300 (1356 Wednesday morning). That’s a lot of power, but the wind kills it. More of a kite-surfing setup than a paddle session.
Friday the 18th and Saturday the 19th stay average. Swell holds around 5ft to 8ft, but the cross-shore wind keeps things lumpy. Saturday morning has a nice 14-second period NW swell (1351 energy), but the moderate north wind means it’s not gonna be clean.
Sunday the 20th and Monday the 21st see the swell hanging around 6ft to 8ft, with longer periods up to 14 seconds. That’s proper groundswell, but the wind is still cross or cross-onshore. Energy readings are high—1466 and 1977—but without clean wind, it’s a struggle.
Now, Wednesday the 23rd morning is the real gem. Swell is 6ft from the NW at 13 seconds, and the wind goes glassy from the east. That’s a magic combo. Energy is strong (1077) and it’s clean enough for experienced surfers to have a proper session. This is the best of the whole outlook.
Thursday the 24th morning keeps it going with 4ft NW swell, glassy conditions, and calm wind. Energy is moderate (599). Perfect for a quiet, clean surf.
Friday the 25th morning brings another glassy session with 7ft from the NNW. Period is shorter at 8 seconds, so it’ll be punchier, but with no wind, it’s still fun.
The last few days, Saturday the 26th through Monday the 28th, are mixed. Saturday has solid NW swell (5ft to 7ft) but cross-onshore wind makes it choppy. Sunday the 27th morning has a nice 5ft NW swell with glassy conditions and light north wind—that’s a clean session (480 energy). Monday the 28th morning fades with a small 3ft NW swell and light cross-offshore wind, clean but small.
Bottom line: Monday the 14th morning for clean small waves, and Wednesday the 23rd morning for bigger, cleaner groundswell. Those are the ones to aim for.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Sat night, min 18°C on Tue afternoon). Winds increasing (calm on Sat night, fresh winds from the N by Tue afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Thu morning, min 17°C on Tue night). Mainly near gales. | ||||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | |||||||||||||||
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 13 | NW 12 | NW 12 | NW 11 | NW 11 | NW 10 | NW 10 | NW 11 | NNW 7 | NNW 9 | NNW 9 | NNW 10 | NNW 9 | NNW 10 | NNW 9 | NNW 9 | NNW 9 | NW 15 | NW 14 | NW 14 | NW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 250 | 330 | 478 | 233 | 191 | 98 | 74 | 42 | 456 | 1356 | 1342 | 1495 | 917 | 1125 | 1263 | 1055 | 656 | 1452 | 904 | 790 | 1204 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | on | cross | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross |
High Tide | 4:29AM2.90m | 4:44PM2.99m | 5:03AM2.81m | 5:19PM2.80m | 5:36AM2.68m | 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 | |||||||
Low Tide | 10:30AM0.08m | 10:52PM0.10m | 11:05AM0.19m | 11:23PM0.28m | 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 | |||||||
 | |  | | | | | |  |  | | | | | | | | | | | | |
 | 7:16 | — | — | 7:16 | — | — | 7:18 | — | — | 7:18 | — | — | 7:20 | — | — | 7:20 | — | — | 7:22 | — | — |
 | — | 7:50 | — | — | 7:47 | — | — | 7:46 | — | — | 7:45 | — | — | 7:44 | — | — | 7:42 | — | — | 7:39 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 26 | 24 | 24 | 23 | 20 | 19 | 18 | 17 | 18 | 19 | 20 | 19 | 18 | 19 | 19 | 18 | 19 | 20 | 19 |
Feels °C | 25 | 24 | 22 | 23 | 22 | 22 | 19 | 16 | 13 | 10 | 11 | 11 | 14 | 13 | 11 | 15 | 15 | 14 | 16 | 17 | 18 |
Swell 1 Height (m) Direction Period (s) | NW 13 | NW 12 | NW 12 | NW 11 | NW 11 | NW 10 | NW 10 | NW 11 | WNW 10 | S 13 | SW 13 | NW 12 | NNW 9 | S 12 | SW 16 | NNW 9 | NW 18 | NW 15 | NW 8 | NNW 8 | NW 13 |
| kJ | 250 | 330 | 478 | 233 | 191 | 98 | 74 | 33 | 94 | 3 | 6 | 209 | 917 | 3 | 10 | 1055 | 437 | 1452 | 439 | 307 | 1204 |
Swell 2 Height (m) Direction Period (s) | NNW 7 | NNW 7 | S 11 | NNW 6 | W 9 | W 9 | WNW 8 | WNW 8 | — | S 13 | — | S 12 | WNW 11 | S 16 | S 11 | NW 20 | SW 14 | SW 14 | NW 14 | NW 14 | SW 13 |
| kJ | 49 | 38 | 2 | 15 | 39 | 39 | 22 | 22 | — | 3 | — | 3 | 323 | 5 | 2 | 60 | 8 | 8 | 904 | 790 | 7 |
Swell 3 Height (m) Direction Period (s) | W 9 | WNW 8 | S 11 | WNW 9 | S 11 | NNW 5 | WNW 12 | S 10 | — | — | — | — | S 12 | — | S 11 | NW 16 | S 11 | SW 14 | SW 14 | SW 13 | — |
| kJ | 40 | 44 | 2 | 26 | 2 | 3 | 14 | 2 | — | — | — | — | 3 | — | 2 | 10 | 2 | 8 | 8 | 7 | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NNW 6 | NW 3 | NNW 5 | NW 4 | NNW 7 | NNW 9 | NNW 9 | NNW 10 | — | NNW 10 | NNW 9 | — | NNW 9 | NNW 8 | — | — | — |
| kJ | — | — | — | — | 12 | 3 | 8 | 42 | 456 | 1356 | 1342 | 1495 | — | 1125 | 1263 | — | 656 | 422 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 172 | 1 | 0 | 14 | 14 | 14 | 687 | 129 | 604 | 584 | 115 | 14 | 205 | 109 | 15 | 204 | 14 | 14 | 14 | 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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