
Surf Forecasts:
Carcavelos surf forecast from 15 Sep 2026:
- Best quality surf: Wednesday 16 Sep, 7AM (local time) - 10ft (3.0m), 8s period, NNW swell with cross-offshore winds.
- Most powerful swell: Thursday 17 Sep, 1AM (local time) - 11ft (3.5m), 10s period, NNW swell with 2,133 kJ wave energy.
- Next surfable swell (1★+): Wednesday 16 Sep, 7AM (local time) - 10ft (3.0m), 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 (Sep 16) at 7AM. The primary swell is predicted to be 3.0m and 8s period with a secondary swell of 0.1m and 13s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Carcavelos in the next 16 days are 3.5m 10s and forecast to arrive on Thursday (Sep 17) at 1AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Tuesday (Sep 15) at 10PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Wed 16th Sep) | 10ft (3.0m) 8s |
| Best Surf | 7AM (Wed 16th Sep) | 10ft (3.0m) 8s |
| Most Powerful | 1AM (Thu 17th Sep) | 11ft (3.5m) 10s |
Table - best surf conditions forecast for Carcavelos over the next 16 days.
The Lowdown
Hey folks, Rusty here. Let’s break down this Carcavelos forecast over the next couple of weeks. It’s a story of two halves, so pay attention.
Starting right now, Tuesday, there’s nothing. Just a tiny 1ft dribble. Not worth the walk. But don’t worry, things are about to get real real quick.
Wednesday morning and afternoon, we see a big pulse of northwest groundswell pushing 10ft. That is a serious amount of water for this break. The wind is cross-offshore and clean, but honestly, this is way too big. The energy is massive – we’re talking readings of 1447 and 1575. It’s powerful, but you’d be risking it.
Thursday, it drops to 8ft, still significant. Morning has a light cross-off breeze and strong energy at 1337. Afternoon is similar size but with a fresher wind. Again, this is not the day for the average surfer.
Friday morning is 8ft, still sizable, with a nice NE cross-off. The afternoon eases to 7ft, but the period drops to 8 seconds and things get marginal.
Then Saturday the 19th morning is where it comes alive. Swell has eased to 6ft, but the period has jumped to a very long 14 seconds. This is real groundswell. Wind is light offshore – proper clean conditions. This is a standout for the experienced crew. The energy is still solid at 1543. Afternoon gets a bit cross-on and bigger at 7ft, so the morning is the one.
Sunday the 20th morning is another good session. 6ft of swell, 12 second period, light offshore breeze. Clean and punchy (814 energy). Afternoon gets more cross-shore, so get out early.
Then the swell starts to back off. Monday is much smaller, around 3-5ft, with average conditions. Tuesday is small too at 4ft, and the afternoon is choppy.
Now, here’s the next proper window. Wednesday the 23rd morning looks like a dream. Swell is a friendly 5ft, the period is a very long 14 seconds, and the wind is dead calm – glassy. This is clean, long-period groundswell at 933 energy. This could be the best day of the whole stretch. Thursday morning is also decent with 4ft and a glassy start.
Then it just dies. Poor and small from Friday the 25th through Tuesday. But, Sunday the 27th morning, there’s a clean little pulse: 2ft, but with a very long 15-second period and glassy conditions. Small, but there might be an epic clean wave if you’ve got a longboard.
Monday the 28th morning also looks okay, 5ft and glassy, but the afternoon turns marginal. After that, it fades to nothing and the forecast is poor into the end of the month.
Alright, so the pick of the bunch is Saturday morning the 19th and Wednesday morning the 23rd. Saturday is more powerful, but Wednesday is cleaner and friendlier. The water is about 66°F, a bit colder than the usual for this time of year. It’s a beach break, so these long-period swells might straighten out a bit. But when the wind is light and off, Carcavelos can be a blast. Just respect the size – anything over 8ft here is for experts only.
Rusty, signing off.
Short Range ForecastMostly dry. Warm (max 24°C on Thu morning, min 17°C on Tue night). Winds decreasing (strong winds from the NNW on Wed afternoon, light winds from the N by Wed night). | Days 5-7 Weather SummaryMostly dry. Warm (max 30°C on Sun afternoon, min 20°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Tue 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | ||||||||||||||
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 7 | NNW 9 | NNW 9 | NNW 10 | NNW 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 11 |
Wave Graph | ||||||||||||||||||||
33 | 389 | 1441 | 1569 | 2133 | 1334 | 1034 | 1144 | 867 | 534 | 1308 | 1220 | 1589 | 1028 | 808 | 650 | 415 | 188 | 574 | 363 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | 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-on | cross-off | cross-off | cross | cross-off | cross-off | cross | off |
High Tide | 5:52PM2.54m | 6:09AM2.47m | 6:29PM2.29m | 6:46AM2.28m | 7:12PM2.05m | 7:35AM2.08m | 8:13PM1.85m | 8:50AM1.94m | 9:52PM1.75m | 10:34AM1.92m | 11:32PM1.82m | 11:55AM2.06m | 00:32AM1.99m | |||||||
Low Tide | 11:53PM0.48m | 12:15PM0.55m | 00:27AM0.70m | 12:56PM0.77m | 1:08AM0.92m | 1:51PM0.97m | 2:08AM1.10m | 3:22PM1.11m | 3:50AM1.18m | 5:15PM1.07m | 5:32AM1.09m | 6:24PM0.90m | ||||||||
— | — | 7:18 | — | — | 7:18 | — | — | 7:20 | — | — | 7:20 | — | — | 7:22 | — | — | 7:22 | — | — | |
7:45 | — | — | 7:44 | — | — | 7:43 | — | — | 7:40 | — | — | 7:39 | — | — | 7:37 | — | — | 7:36 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 19 | 20 | 21 | 19 | 24 | 23 | 19 | 24 | 23 | 21 | 26 | 26 | 25 | 28 | 30 | 27 | 30 | 31 | 28 |
Feels °C | 18 | 16 | 14 | 15 | 13 | 20 | 17 | 14 | 22 | 19 | 18 | 24 | 24 | 23 | 28 | 28 | 24 | 27 | 28 | 24 |
Swell 1 Height (m) Direction Period (s) | NW 11 | WNW 11 | S 13 | SW 13 | S 12 | NNW 10 | S 12 | SW 16 | NW 16 | NW 13 | NW 15 | NW 14 | NW 13 | NW 13 | NW 12 | NW 11 | NW 11 | NW 10 | NW 12 | NW 11 |
33 | 88 | 3 | 6 | 3 | 1334 | 3 | 10 | 38 | 212 | 1308 | 1220 | 1589 | 1028 | 808 | 650 | 415 | 188 | 574 | 363 | |
Swell 2 Height (m) Direction Period (s) | WNW 8 | — | S 13 | — | S 12 | S 12 | S 16 | S 11 | SW 15 | SW 14 | SW 14 | NNW 8 | SW 13 | S 13 | S 13 | S 11 | S 12 | NW 13 | S 11 | — |
13 | — | 3 | — | 3 | 3 | 5 | 3 | 9 | 8 | 8 | 315 | 7 | 3 | 3 | 2 | 3 | 171 | 9 | — | |
Swell 3 Height (m) Direction Period (s) | S 13 | — | — | — | — | — | — | — | S 11 | S 11 | — | SW 14 | — | S 13 | S 13 | S 13 | S 10 | N 6 | S 12 | S 12 |
4 | — | — | — | — | — | — | — | 2 | 2 | — | 8 | — | 3 | 3 | 3 | 2 | 16 | 3 | 3 | |
Wind waves Height (m) Direction Period (s) | NNW 5 | NNW 7 | NNW 9 | NNW 9 | NNW 10 | — | NNW 9 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | — | — | — | — | WNW 2 | — | — | NW 10 | NNW 4 |
77 | 389 | 1441 | 1569 | 2133 | — | 1034 | 1144 | 867 | 534 | 500 | — | — | — | — | 1 | — | — | 181 | 8 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 453 | 202 | 612 | 309 | 96 | 5 | 202 | 96 | 4 | 187 | 0 | 0 | 178 | 0 | 0 | 1 | 0 | 0 | 1 | 0 |
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.










