Surf Forecasts:
Carcavelos surf forecast from 18 Aug 2026:
- Best quality surf: Friday 21 Aug, 1PM (local time) - 7ft (2.1m), 8s period, NNW swell with cross-offshore winds.
- Most powerful swell: Sunday 23 Aug, 7AM (local time) - 10ft (3.0m), 9s period, NNW swell with 1,494 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 1AM (local time) - 4ft (1.2m), 8s period with NNW swell.
Best Forecast Surf Conditions for Carcavelos this week:
The surf forecast for Carcavelos over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 19) at 1AM. The primary swell is predicted to be 1.2m and 8s period with a secondary swell of 0.3m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Carcavelos in the next 16 days are 3.0m 9s and forecast to arrive on Sunday (Aug 23) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Thursday (Aug 20) at 7PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Wed 19th Aug) | 4ft (1.2m) 8s |
| Best Surf | 1PM (Fri 21st Aug) | 7ft (2.1m) 8s |
| Most Powerful | 7AM (Sun 23rd Aug) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Carcavelos over the next 16 days.
The Lowdown
Right then, let’s see what we’ve got for Carcavelos. To be honest, the next few days are pretty grim. The wind is all wrong, blowing cross-onshore or onshore, and the swell is small and weak – combined energy is only around 255 on Tuesday morning. It’s just not worth getting wet.
The water temp is sitting at 69°, which is about average for this time of year, so no surprises there.
We do have a bit of a window on Thursday morning, the 20th. The wind goes glassy, which is a major positive, and the waves will be super clean. But don't get too excited – the swell is only 2ft from the WNW with a short period of 9 seconds. The combined energy is weak at 83. It’s surfable, but it’s flat, weak, and very ordinary. Not exactly firing.
Now, things get a bit more interesting from Friday the 21st right through to Monday the 24th. The swell picks up big time, with heights ranging from 6ft up to 10ft, and combined energy getting into the strong zone, hitting 1266 on Sunday morning. The wind turns cross-offshore from the NNW, so the conditions will look clean.
However, there’s a major problem. For a beginner-friendly beach break like Carcavelos, anything over 5ft is getting too big for the learners, and when it hits over 8ft, it's expert-only territory. The forecast is telling us the swell is predicted to be too big for this break. For the bigger days, the setup might actually look more interesting for kite surfing than paddle surfing.
After that, the surf drops back down, but the wind stays up. There are some surfable mornings from the 28th of August through to the 2nd of September, with clean cross-offshore winds and swell around the 5ft to 6ft mark. The energy is moderate, in the 300 to 500 range. These are alright, but nothing to write home about. The standout window is the morning of the 31st of August, which gets a nod for "expect good surf conditions." You’ll have 5ft NNW swell with clean, gentle cross-offshore breezes and combined energy of 329. It’s not epic, but by a long way the best on offer in this stretch.
So, overall, for the more consistent surfer, it’s a mixed bag. The big swell from the 21st to the 24th is going to be too much for Carcavelos, but the 31st of August morning looks like a solid, clean, and surfable day.
Rusty.
Short Range ForecastMostly dry. Warm (max 24°C on Wed afternoon, min 19°C on Thu night). Winds increasing (calm on Tue night, fresh winds from the NNW by Thu night). | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Fri morning, min 18°C on Fri night). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
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 8 | NNW 8 | NNW 7 | NNW 7 | WNW 10 | WNW 9 | WNW 9 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 7 |
Wave Graph | |||||||||||||||||||||
243 | 237 | 159 | 94 | 72 | 51 | 62 | 61 | 489 | 337 | 590 | 667 | 931 | 933 | 1125 | 1259 | 866 | 887 | 662 | 322 | 214 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | glassy | cross-on | cross-on | cross | glassy | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 7:12PM2.36m | 7:35AM2.24m | 7:59PM2.11m | 8:27AM2.07m | 9:03PM1.91m | 9:42AM1.96m | 10:34PM1.82m | 11:14AM1.96m | 00:03AM1.88m | 12:28PM2.09m | 1:03AM2.02m | 1:19PM2.27m | 1:45AM2.19m | ||||||||
Low Tide | 12:54PM0.57m | 1:16AM0.67m | 1:40PM0.78m | 2:01AM0.89m | 2:39PM0.97m | 3:04AM1.06m | 4:08PM1.07m | 4:38AM1.12m | 5:47PM1.03m | 6:06AM1.04m | 6:54PM0.89m | 7:03AM0.88m | 7:39PM0.71m | ||||||||
6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — | |
— | 8:28 | — | — | 8:27 | — | — | 8:24 | — | — | 8:23 | — | — | 8:22 | — | — | 8:21 | — | — | 8:20 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 23 | 22 | 23 | 24 | 22 | 23 | 23 | 19 | 21 | 21 | 19 | 21 | 21 | 19 | 21 | 21 | 18 | 21 | 21 | 18 |
Feels °C | 24 | 23 | 23 | 23 | 24 | 23 | 23 | 21 | 15 | 17 | 16 | 15 | 16 | 15 | 15 | 16 | 15 | 13 | 16 | 16 | 14 |
Swell 1 Height (m) Direction Period (s) | NNW 8 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | NNW 6 | NNW 5 | WNW 9 | SSW 15 | NW 11 | SSW 14 | SSW 14 | WNW 8 | SSW 14 | SSW 14 | SW 13 | SW 13 | SW 13 | W 8 | W 8 | W 8 |
243 | 237 | 159 | 94 | 72 | 34 | 19 | 61 | 21 | 172 | 21 | 18 | 24 | 20 | 20 | 7 | 7 | 7 | 1 | 5 | 5 | |
Swell 2 Height (m) Direction Period (s) | W 8 | SW 16 | WNW 8 | WNW 8 | WNW 8 | WNW 10 | WNW 9 | NW 11 | SW 12 | SSW 15 | W 11 | — | SSW 14 | SSW 14 | W 9 | — | — | W 9 | SW 13 | SW 13 | SW 12 |
5 | 38 | 13 | 12 | 11 | 51 | 62 | 19 | 6 | 21 | 10 | — | 20 | 20 | 6 | — | — | 2 | 7 | 7 | 6 | |
Swell 3 Height (m) Direction Period (s) | SW 14 | W 8 | SSW 15 | SSW 14 | WNW 10 | SSW 4 | SSW 4 | SSW 13 | — | — | — | — | — | — | — | — | — | — | SW 13 | — | W 11 |
7 | 5 | 21 | 20 | 21 | 3 | 2 | 17 | — | — | — | — | — | — | — | — | — | — | 7 | — | 2 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | NW 5 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 7 |
— | — | — | — | — | — | — | 25 | 489 | 337 | 590 | 667 | 931 | 933 | 1125 | 1259 | 866 | 887 | 662 | 322 | 214 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 14 | 14 | 0 | 14 | 76 | 4 | 0 | 434 | 434 | 1 | 531 | 255 | 586 | 482 | 484 | 897 | 357 | 202 | 320 | 477 | 320 |
Best forecast wave conditions in Lisboa | |||||||||||||||||||||
Best forecast wave conditions in Portugal | |||||||||||||||||||||
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Information about the Carcavelos Surf forecast
The above surf forecast table for Carcavelos provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Carcavelos can be found by selecting the local surf guide option on the grey menu. Our Carcavelos 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 (Carcavelos) 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 Carcavelos 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.
Carcavelos is 1 km (1 miles) from Carcavelos. If you plan a holiday in Lisboa, look for hotels and other accommodation in Carcavelos. Carcavelos has rooms for a wide range of budgets as well as car hire and transport links.











