Surf Forecasts:
Castelejo surf forecast from 20 Aug 2026:
- Best quality surf: Sunday 23 Aug, 10AM (local time) - 6ft (1.9m), 12s period, WNW swell with cross-offshore winds.
- Most powerful swell: Sunday 23 Aug, 10AM (local time) - 6ft (1.9m), 12s period, WNW swell with 980 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 1AM (local time) - 3ft (0.9m), 9s period with NNW 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 23) at 1AM. The primary swell is predicted to be 0.5m and 16s period with a secondary swell of 0.9m and 9s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Castelejo in the next 16 days are 1.9m 12s and forecast to arrive on Sunday (Aug 23) at 10AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 6s period and expected on Monday (Aug 24) at 4AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sun 23rd Aug) | 3ft (0.9m) 9s |
| Best Surf | 10AM (Sun 23rd Aug) | 6ft (1.9m) 12s |
| Most Powerful | 10AM (Sun 23rd Aug) | 6ft (1.9m) 12s |
Table - best surf conditions forecast for Castelejo over the next 16 days.
The Lowdown
Alright, grab a coffee and listen up, 'cause I’m gonna break this down for you. I'm Rusty, and I've got the straight story on what's coming our way at Castelejo.
First thing’s first: the water here is sitting at 69°, which is a bit colder than you’d expect for this time of year. Nothing crazy, but you’ll want a decent spring suit.
Now, let’s be honest—the next week and a half is pretty grim. From Thursday 20th August all the way through to Saturday 30th August, it’s a long stretch of onshore, cross-onshore, or just plain messy winds. We’ve got a mix of moderate to fresh breezes, mostly from the north to northwest, and the swell is small and short-period. The wave energy is weak to moderate at best, with values like 62, 292, or 360 (combined energy of all swells directed here). It’s choppy, lumpy, and honestly, not worth paddling out for. You’ll be fighting the wind more than the waves.
But hold on—there’s a light at the end of this windy tunnel. Sunday 23rd August morning is the real standout. The wind swings to a gentle south breeze, which is a clean cross-offshore at Castelejo. That’s the sweet spot. The swell jumps up to 6 ft from the west-northwest with a period of 12 seconds, giving us a solid moderate-to-strong energy reading of 1013. That’s proper groundswell energy. The conditions are clean, and the waves will have some real push. This is best for experienced surfers—it’s not a day for beginners. The swell direction (WNW) is a good match for the optimum northwest exposure here. Expect a few others out, since crowds are sometimes an issue, but it’s worth it.
The rest of the forecast is a write-off until the very end. Friday 4th September morning shows a bit of promise with 6 ft from the northwest and a light breeze, but the period drops to 8 seconds and the energy is moderate (699). It’s marginal, and the wind is still cross-onshore, so it’s not a standout. The afternoon sees 7 ft but the same issues.
So, to sum it up: if you’ve got patience, wait for the morning of Sunday 23rd August. That’s your window. Everything else is a long, windy gap.
Rusty, signing off.
Short Range ForecastMostly dry. Warm (max 22°C on Thu morning, min 18°C on Thu night). Winds decreasing (fresh winds from the NNW on Thu night, calm by Sat night). | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Sun night. Warm (max 22°C on Sun afternoon, min 20°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | |||||||||||||||
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) | WNW 9 | WNW 9 | NW 7 | NW 8 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | WNW 12 | WNW 11 | W 10 | W 9 | W 8 | W 7 | WNW 7 | WNW 7 | NW 7 | NW 6 | NW 7 | NW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 47 | 45 | 269 | 223 | 151 | 588 | 320 | 256 | 144 | 980 | 798 | 668 | 548 | 339 | 124 | 124 | 96 | 65 | 40 | 116 | 307 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | glassy | cross-off | cross-off | cross-off | cross | cross-on | glassy | glassy | cross-on | cross-on | cross-on | on | on |
High Tide | 8:54PM1.93m | 9:33AM1.97m | 10:25PM1.84m | 11:05AM1.98m | 11:54PM1.90m | 12:19PM2.11m | 00:53AM2.05m | 1:10PM2.30m | 1:36AM2.22m | 1:49PM2.49m | 2:11AM2.38m | 2:24PM2.68m | 2:44AM2.53m | ||||||||
Low Tide | 2:28PM0.99m | 2:53AM1.08m | 3:57PM1.09m | 4:28AM1.14m | 5:38PM1.05m | 5:57AM1.05m | 6:44PM0.90m | 6:53AM0.89m | 7:29PM0.72m | 7:34AM0.70m | 8:05PM0.54m | 8:09AM0.53m | 8:37PM0.37m | ||||||||
 | |  | | |  | | | |  | |  |  |  | | | | | | | | |
 | 6:56 | — | — | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | 7:00 | — | — | 7:01 | — | — |
 | — | 8:21 | — | — | 8:20 | — | — | 8:19 | — | — | 8:16 | — | — | 8:15 | — | — | 8:15 | — | — | 8:13 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 19 | 20 | 20 | 18 | 19 | 20 | 20 | 21 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 22 | 21 | 20 |
Feels °C | 22 | 22 | 16 | 17 | 16 | 13 | 18 | 18 | 20 | 21 | 21 | 22 | 22 | 22 | 22 | 22 | 21 | 22 | 23 | 21 | 19 |
Swell 1 Height (m) Direction Period (s) | WNW 9 | WNW 9 | NW 11 | NNW 12 | NNW 11 | WNW 9 | NNW 10 | NNW 10 | NNW 9 | WNW 12 | WNW 11 | W 10 | W 9 | W 8 | W 7 | WNW 7 | WNW 7 | NW 7 | NW 6 | W 9 | NW 9 |
| kJ | 47 | 45 | 18 | 56 | 149 | 30 | 320 | 256 | 127 | 980 | 798 | 668 | 548 | 339 | 124 | 124 | 96 | 65 | 40 | 2 | 307 |
Swell 2 Height (m) Direction Period (s) | NNW 6 | NW 6 | SW 15 | W 8 | WNW 9 | SW 14 | WNW 9 | WNW 8 | WNW 16 | NNW 9 | NNW 8 | NNW 8 | N 8 | SW 13 | NW 8 | SW 12 | SW 12 | NW 10 | W 9 | SW 11 | SW 11 |
| kJ | 15 | 15 | 8 | 5 | 25 | 7 | 32 | 24 | 144 | 26 | 14 | 6 | 5 | 6 | 53 | 6 | 6 | 4 | 2 | 5 | 5 |
Swell 3 Height (m) Direction Period (s) | SSW 4 | SSW 4 | SW 12 | SW 14 | SW 14 | — | SW 14 | SW 14 | WNW 8 | SW 13 | SW 13 | SW 13 | SW 13 | — | SW 12 | W 11 | — | SW 12 | SW 11 | — | — |
| kJ | 3 | 2 | 6 | 8 | 7 | — | 8 | 8 | 24 | 7 | 7 | 7 | 7 | — | 6 | 2 | — | 5 | 5 | — | — |
Wind waves Height (m) Direction Period (s) | — | — | NW 7 | NW 8 | NW 7 | NNW 10 | — | WNW 9 | — | — | — | — | — | — | — | — | — | — | — | NW 7 | — |
| kJ | — | — | 269 | 223 | 151 | 588 | — | 58 | — | — | — | — | — | — | — | — | — | — | — | 116 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 181 | 181 | 65 | 65 | 609 | 65 | 9 | 9 | 0 | 0 | 286 | 79 | 79 | 139 | 0 | 0 | 9 | 46 | 730 | 9 | 9 |
Best forecast wave conditions in The Algarve | |||||||||||||||||||||
Best forecast wave conditions in Portugal | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Castelejo surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest