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 (2.4m), 14s period, NW swell with 2,317 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 2.4m 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 10s period and expected on Monday (Sep 21) at 7PM.
| 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 (2.4m) 14s |
Table - best surf conditions forecast for Praia das Macas over the next 16 days.
The Lowdown
Right then, let's talk about what's on the cards for our little slice of coast over the next couple of weeks. I'm looking at Praia das Macas, which is a beginner-friendly beach break that gets exposed to the NW. The water temp is about average for this time of year, so nothing wild there.
Honestly, the first half of the week is a write-off. We've got a strong north wind blowing cross-onshore, making a mess of things. Tuesday and Wednesday are just not worth paddling out – the swell is there, but it's ugly. The combined energy is weak to moderate at best (127 to 1486), but the wind has it all chopped up and lumpy. Thursday and Friday aren't much better with more cross and cross-onshore wind.
Things start to look up on Saturday, September 19th. That morning is the real standout. We've got a light offshore from the ESE and a clean 8ft groundswell from the NW. The period is a very long 14 seconds, which means proper, powerful waves. The combined energy is strong at 2325. This is a big swell though, over 8ft, so it's really for experienced surfers only. Beginners should sit this one out. The long period will make for some nice, lined-up waves peeling down the beach, but with that size, it'll be a handful.
Sunday, September 20th morning is a solid second option. Swell drops to a still decent 5ft from the NW with a long 12-second period. The wind is a gentle offshore from the ESE, keeping it clean. Combined energy is moderate (741). It’s a bit more manageable for the average surfer.
After Sunday afternoon, the wind goes onshore again and the swell steps down. There's a few more mornings with clean conditions and smaller waves – Monday, September 21st morning has a weak 3ft swell, Tuesday, September 22nd morning with 4ft, and Wednesday, September 23rd with just 2ft but a super long 16-second period. Nice for a quiet, small-wave session on a longboard.
There's a bit of a gap with nothing great until Thursday, September 24th morning offers a clean 5ft swell from the WNW with a 13-second period and a cross-off wind. Friday, September 25th morning is glassy with a small 3ft NW swell. Saturday, September 26th morning is also glassy with a 4ft WNW swell. After that, it fades back into messy, onshore conditions for the start of October.
So, the one true standout is Saturday, September 19th morning if you've got the experience and the nerve. For everyone else, the pick of the cleaner, smaller mornings is Sunday, September 20th.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Mon night, min 17°C on Tue night). Winds increasing (moderate winds from the N on Mon night, near gales from the N by Wed afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Sun morning, min 18°C on Thu night). Winds decreasing (strong winds from the N on Thu night, calm by Sun morning). | ||||||||||||||||||||
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 | NW 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 12 | NW 12 |
Wave Graph  | |||||||||||||||||||||
 kJ | 74 | 92 | 413 | 1409 | 1480 | 1722 | 1335 | 992 | 1331 | 1050 | 665 | 1697 | 2317 | 1565 | 1077 | 734 | 579 | 408 | 242 | 584 | 634 |
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 | cross-on | cross | cross | cross-on | cross | off | cross-on | cross | off | cross-on | cross-off | off | on | cross |
High Tide | 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 | 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 | 19 | 19 | 18 | 17 | 19 | 19 | 20 | 19 | 18 | 20 | 20 | 21 | 24 | 24 | 26 | 28 | 26 | 26 | 24 | 25 | 24 |
Feels °C | 17 | 15 | 12 | 10 | 11 | 12 | 13 | 13 | 11 | 15 | 14 | 20 | 22 | 23 | 22 | 29 | 23 | 23 | 24 | 23 | 21 |
Swell 1 Height (m) Direction Period (s) | NW 10 | NW 11 | WNW 10 | S 13 | SW 13 | WNW 12 | NW 10 | S 12 | SW 16 | NW 15 | NW 14 | NW 15 | NW 14 | NW 13 | NW 13 | NW 12 | NW 11 | NW 11 | NW 10 | NW 12 | NW 12 |
| kJ | 74 | 33 | 86 | 3 | 6 | 365 | 1335 | 3 | 10 | 9 | 114 | 1697 | 2317 | 1565 | 1077 | 734 | 579 | 408 | 217 | 584 | 634 |
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 18 | SW 14 | SW 14 | SW 13 | S 13 | S 10 | S 11 | S 5 | NW 13 | S 5 | S 6 |
| kJ | 22 | 13 | 3 | 3 | — | 3 | 3 | 5 | 3 | 9 | 84 | 8 | 8 | 7 | 3 | 2 | 9 | 2 | 242 | 2 | 3 |
Swell 3 Height (m) Direction Period (s) | WNW 12 | S 13 | — | — | — | — | — | — | — | S 11 | SW 14 | S 14 | — | — | S 13 | SW 13 | S 13 | S 12 | SSE 11 | S 11 | S 12 |
| kJ | 14 | 4 | — | — | — | — | — | — | — | 2 | 8 | 4 | — | — | 3 | 7 | 3 | 3 | 23 | 2 | 3 |
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 | — | — | — | — | WNW 2 | — | — | — | NW 4 |
| kJ | 17 | 92 | 413 | 1409 | 1480 | 1722 | — | 992 | 1331 | 1050 | 665 | 454 | — | — | — | — | 1 | — | — | — | 17 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 14 | 439 | 599 | 604 | 439 | 109 | 22 | 439 | 115 | 22 | 206 | 14 | 0 | 129 | 14 | 0 | 22 | 0 | 0 | 22 | 8 |
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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