Surf Forecasts:
Castelejo surf forecast from 18 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 1AM (local time) - 3ft (0.9m), 8s period, NNW swell with cross-offshore winds.
- Most powerful swell: Saturday 22 Aug, 10PM (local time) - 8ft (2.5m), 8s period, NNW swell with 920 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 1AM (local time) - 3ft (0.9m), 8s 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 Wednesday (Aug 19) at 1AM. The primary swell is predicted to be 0.9m and 8s period with a secondary swell of 0.2m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Castelejo in the next 16 days are 2.5m 8s and forecast to arrive on Saturday (Aug 22) at 10PM. 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 Wednesday (Aug 19) at 4PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Wed 19th Aug) | 3ft (0.9m) 8s |
| Best Surf | 1AM (Wed 19th Aug) | 3ft (0.9m) 8s |
| Most Powerful | 10PM (Sat 22nd Aug) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Castelejo over the next 16 days.
The Lowdown
Alright, Rusty here. Let's have a look at what's cookin' at Castelejo over the next couple of weeks.
Honestly, mate, I gotta be straight with you – it’s a rough stretch ahead. We’re looking at a solid block of time where the conditions just aren’t coming together. There’s a bit of swell at times, but the wind is gonna be a bastard for most of it, and the quality is just shot. The water is sitting at 67°, which is a proper 4° colder than normal, so it’s gonna feel nippy. You'll want a good thick wetsuit.
The first real chance to paddle out is on Wednesday the 19th, in the morning. We’ve got a tiny little 3ft swell out of the NNW with a period of 8 seconds (combined energy 73). That’s pretty weak, but the saving grace is a clean offshore wind from the SE. It’s gonna be small and gutless, but it’ll be clean. After that, it goes downhill fast. The afternoon shows the swell dropping to 2ft and the wind turns, so that’s your one and only small window.
From Thursday the 20th right through to the end of the month, the wind is just relentless. It swings onshore and cross-onshore from the NW and NNW, blowing 15 to 22 mph. We do see the swell picking up – a solid 8ft on Sunday the 23rd with moderate energy (814), and that’s actually a fair bit of size – definitely too big for beginners. But with that strong onshore wind, it’s gonna be a messy, choppy, blown-out mess. Not worth paddling for. That kind of setup with a strong cross-shore and a beach-and-reef break might be more interesting for a kite surfer than a surfer.
We get a tiny drop in wind on Wednesday the 27th, but the swell is 6ft with strong NW winds again, still lumpy. There’s another pulse of energy on Saturday the 29th (combined 489) with a 5ft NW swell and a longer 10-second period, but once again, that fresh cross-onshore wind kills it. A long period groundswell like that would be better at a point or reef, but Castelejo just isn't catching a break with the wind.
So, the bottom line is: there’s one clean, tiny window on Wednesday the 19th morning for some longboard fun in clean conditions. Everything else is a write-off due to wind. It’s a long, bleak run on the horizon, but that’s the coast for ya. It won't stay poor forever.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Tue afternoon, min 19°C on Thu night). Winds increasing (calm on Wed night, fresh winds from the NNW by Thu night). | Days 4-6 Weather SummaryMostly dry. Warm (max 20°C on Fri morning, min 18°C on Fri night). Mainly strong 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 8 | NNW 7 | WNW 10 | WNW 9 | WNW 9 | NNW 6 | NW 8 | NW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | NNW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 133 | 125 | 98 | 67 | 37 | 39 | 47 | 45 | 81 | 373 | 284 | 477 | 558 | 666 | 790 | 807 | 660 | 717 | 466 | 343 | 250 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | off | cross-off | cross-off | on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | on | on | cross-on | cross-on | on | cross-on |
High Tide | 7:02PM2.39m | 7:25AM2.26m | 7:49PM2.13m | 8:18AM2.09m | 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 | ||||||||
Low Tide | 12:42PM0.58m | 1:05AM0.69m | 1:28PM0.80m | 1:50AM0.90m | 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 | ||||||||
 | |  | | | | | | | | | | | | |  |  | | | | | |
 | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — |
 | — | 8:23 | — | — | 8:22 | — | — | 8:21 | — | — | 8:20 | — | — | 8:19 | — | — | 8:16 | — | — | 8:15 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 23 | 22 | 23 | 22 | 22 | 22 | 22 | 20 | 20 | 20 | 18 | 20 | 20 | 19 | 19 | 19 | 18 | 19 | 19 | 18 |
Feels °C | 24 | 23 | 24 | 23 | 22 | 24 | 22 | 21 | 18 | 17 | 16 | 12 | 16 | 15 | 13 | 14 | 14 | 11 | 14 | 14 | 12 |
Swell 1 Height (m) Direction Period (s) | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | WNW 9 | WNW 9 | WNW 9 | NNW 12 | NNW 11 | NNW 10 | NW 10 | SW 14 | SW 14 | SW 13 | SW 13 | W 9 | NNW 8 | NNW 8 | W 8 |
| kJ | 133 | 125 | 98 | 67 | 37 | 29 | 47 | 45 | 44 | 14 | 103 | 130 | 53 | 8 | 8 | 7 | 7 | 2 | 466 | 343 | 1 |
Swell 2 Height (m) Direction Period (s) | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 10 | NNW 6 | SSW 4 | NW 11 | SW 14 | SW 13 | SW 14 | SW 14 | — | — | — | — | SW 13 | W 8 | W 8 | S 12 |
| kJ | 6 | 6 | 7 | 6 | 6 | 39 | 16 | 2 | 29 | 8 | 7 | 7 | 8 | — | — | — | — | 7 | 5 | 5 | 3 |
Swell 3 Height (m) Direction Period (s) | SW 16 | SW 15 | SW 14 | SSW 14 | SW 14 | SW 4 | SSW 4 | SW 13 | SW 15 | NW 12 | — | — | — | — | — | — | — | — | SW 13 | S 13 | — |
| kJ | 10 | 9 | 8 | 20 | 7 | 4 | 1 | 7 | 8 | 6 | — | — | — | — | — | — | — | — | 7 | 3 | — |
Wind waves Height (m) Direction Period (s) | — | — | — | S 4 | SSW 4 | — | — | NW 6 | NNW 6 | NW 8 | NW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 9 | NNW 9 | NNW 8 | — | — | NNW 7 |
| kJ | — | — | — | 1 | 6 | — | — | 20 | 81 | 373 | 284 | 477 | 558 | 666 | 790 | 807 | 660 | 717 | — | — | 250 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 79 | 187 | 0 | 0 | 254 | 0 | 79 | 465 | 382 | 76 | 458 | 390 | 743 | 458 | 390 | 725 | 247 | 65 | 382 | 653 | 390 |
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.
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