Surf Forecasts:
Castelejo surf forecast from 15 Aug 2026:
- Best quality surf: Sunday 16 Aug, 10AM (local time) - 6ft (1.8m), 8s period, NW swell with glassy winds.
- Most powerful swell: Sunday 16 Aug, 4AM (local time) - 7ft (2.1m), 9s period, NW swell with 631 kJ wave energy.
- Next surfable swell (1★+): Sunday 16 Aug, 10AM (local time) - 6ft (1.8m), 8s period with NW swell.
Best Forecast Surf Conditions for Castelejo this week:
The surf forecast for Castelejo over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 16) at 10AM. The primary swell is predicted to be 1.8m and 8s period with a secondary swell of 0.1m and 16s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Castelejo in the next 16 days are 2.1m 9s and forecast to arrive on Sunday (Aug 16) 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 0.4m 4s period and expected on Thursday (Aug 20) at 7PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Sun 16th Aug) | 6ft (1.8m) 8s |
| Best Surf | 10AM (Sun 16th Aug) | 6ft (1.8m) 8s |
| Most Powerful | 4AM (Sun 16th Aug) | 7ft (2.1m) 9s |
Table - best surf conditions forecast for Castelejo over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Let’s have a look at the waves on the calendar. It’s a bit of a strange one, so bear with me.
The next couple of weeks are looking pretty rough for a proper paddle. We’ve got a window of small, weak surf and a whole lot of wind messing things up. The first week is mostly a write-off—there’s just not enough push, and the wind is all over the place. We’re looking at a lot of onshore and cross-onshore slop, especially through the 21st to the 26th. There’s some swell, but it’s junky, short-period stuff with a lot of breeze on it. You’d be fighting a losing battle.
The one bright spot early on is Sunday the 16th. It’s not big, but the conditions line up. Early morning will see a glassy 6ft of northwest swell at Castelejo. It’s a beach and reef setup, very consistent, and that clean, slight air will make it feel better than the size suggests. The swell energy is moderate, with a reading of 459 in the morning, dropping a touch to 355 in the afternoon. It’s still clean and glassy. That’s your window if you’re desperate for a wave, but it’s not a world-beater. The water is a bit colder than normal for the time of year, sitting right around 68°, which is noticeable but not crazy.
After that, it’s a long slog. We’re talking about days of poor surf and messy conditions. The swell stays small and weak, and the wind keeps flipping around, mostly from the northwest, which puts us in a bad spot. There’s a lot of days with no real hope. From the 18th to the 28th, it’s a real dry spell. There are a few days with surfable waves but nothing you'd call good. The energy readings are low, often under 200, which tells you it’s just not moving enough.
Now, the standout is at the end of the window, and it’s a big one. On Sunday the 30th of August, the swell is forecast to be huge. We’re talking 10ft on the face, with a longer period of 10 seconds. The energy reading is massive at 1629, which is strong, very strong. The problem is, that’s just too big for this break. The forecast notes say the wind and tide are favorable, but the swell is predicted to be too big for this break. It would be a washing machine, even if the wind is a gentle breeze. It’s for experts only, and even then, it could be sketchy. If you're not a seasoned charger, give it a miss. You’re better off watching from the cliff.
So, to sum it up: we’ve got one clean but small window on Sunday, then a long, bumpy stretch, and then a potentially epic but dangerous swell on the last day of the month. It’s a waiting game. The long-range stuff looks promising, but it’s a way out, so don't get your hopes up too much.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Mon morning, min 19°C on Sat night). Winds decreasing (fresh winds from the NW on Sat afternoon, calm by Sun morning). | Days 5-7 Weather SummaryMostly dry. Warm (max 23°C on Tue afternoon, min 20°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Sat 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 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 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | NW 8 | NNW 8 | NNW 8 |
Wave Graph | ||||||||||||||||||||
333 | 523 | 449 | 346 | 192 | 173 | 175 | 140 | 100 | 105 | 86 | 54 | 36 | 39 | 49 | 49 | 45 | 191 | 307 | 264 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | glassy | glassy | glassy | off | cross-off | cross-on | cross | cross | glassy | off | cross | cross-off | off | cross-on | on | cross-on | on | cross-on |
High Tide | 5:03PM3.09m | 5:26AM2.76m | 5:42PM2.90m | 6:04AM2.62m | 6:21PM2.65m | 6:42AM2.45m | 7:02PM2.39m | 7:25AM2.26m | 7:49PM2.13m | 8:18AM2.09m | 8:54PM1.93m | 9:33AM1.97m | 10:25PM1.84m | |||||||
Low Tide | 11:15PM0.06m | 11:23AM0.21m | 11:51PM0.24m | 12:02PM0.38m | 00:27AM0.46m | 12:42PM0.58m | 1:05AM0.69m | 1:28PM0.80m | 1:50AM0.90m | 2:28PM0.99m | 2:53AM1.08m | 3:57PM1.09m | ||||||||
— | — | 6:52 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — | |
8:28 | — | — | 8:27 | — | — | 8:24 | — | — | 8:23 | — | — | 8:22 | — | — | 8:21 | — | — | 8:20 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 20 | 21 | 21 | 21 | 22 | 22 | 21 | 22 | 23 | 22 | 22 | 23 | 22 | 23 | 23 | 21 | 21 | 21 | 20 |
Feels °C | 20 | 18 | 24 | 23 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 21 | 20 | 18 | 16 |
Swell 1 Height (m) Direction Period (s) | S 18 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 7 | WNW 9 | WNW 9 | WNW 9 | NW 8 | WNW 9 | NNW 10 |
6 | 523 | 449 | 346 | 192 | 173 | 175 | 140 | 100 | 105 | 86 | 54 | 36 | 21 | 49 | 49 | 45 | 191 | 26 | 73 | |
Swell 2 Height (m) Direction Period (s) | — | SW 16 | SW 16 | SW 15 | SW 15 | W 7 | SW 16 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 10 | NNW 7 | NW 6 | NW 6 | WNW 9 | SW 13 | WNW 11 |
— | 10 | 10 | 9 | 8 | 1 | 10 | 7 | 6 | 6 | 7 | 6 | 6 | 39 | 18 | 10 | 8 | 26 | 7 | 39 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | SW 15 | S 16 | SW 16 | SW 16 | SW 15 | SW 14 | SSW 14 | SW 14 | SW 4 | SSW 4 | SSW 4 | SW 4 | SW 14 | W 12 | SW 14 |
— | — | — | — | — | 8 | 5 | 10 | 10 | 9 | 8 | 20 | 7 | 3 | 1 | 2 | 3 | 8 | 11 | 7 | |
Wind waves Height (m) Direction Period (s) | NW 8 | — | — | — | — | — | SSW 2 | — | — | — | — | SSW 3 | SW 4 | — | — | — | — | — | NNW 8 | NNW 8 |
333 | — | — | — | — | — | 1 | — | — | — | — | 1 | 3 | — | — | — | — | — | 307 | 264 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 748 | 23 | 0 | 0 | 0 | 0 | 4 | 9 | 79 | 615 | 0 | 0 | 609 | 0 | 0 | 9 | 9 | 342 | 458 | 347 |
Best forecast wave conditions in The Algarve | ||||||||||||||||||||
Best forecast wave conditions in Portugal | ||||||||||||||||||||
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Information about the Castelejo Surf forecast
The above surf forecast table for Castelejo provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Castelejo can be found by selecting the local surf guide option on the grey menu. Our Castelejo 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 (Castelejo) 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 Castelejo 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.
Castelejo is 25 km (16 miles) from Lagos. If you plan a holiday in The Algarve, look for hotels and other accommodation in Lagos. Lagos has rooms for a wide range of budgets as well as car hire and transport links.











