
Surf Forecasts:
Castelejo surf forecast from 11 Sep 2026:
- Best quality surf: Thursday 17 Sep, 4PM (local time) - 6ft (1.9m), 11s period, NW swell with glassy winds.
- Most powerful swell: Thursday 17 Sep, 10AM (local time) - 7.5ft (2.3m), 11s period, NW swell with 1,211 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 7AM (local time) - 3ft (0.9m), 6s 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 Saturday (Sep 12) at 7AM. The primary swell is predicted to be 0.9m and 6s period. 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 2.3m 11s and forecast to arrive on Thursday (Sep 17) at 10AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 8s period and expected on Sunday (Sep 13) at 4PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sat 12th Sep) | 3ft (0.9m) 6s |
| Best Surf | 4PM (Thu 17th Sep) | 6ft (1.9m) 11s |
| Most Powerful | 10AM (Thu 17th Sep) | 7.5ft (2.3m) 11s |
Table - best surf conditions forecast for Castelejo over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a good look at what’s coming down the line for Castelejo (beach and reef). We’ve got a fairly quiet start, then the waves build, but wind and condition windows are real tight.
Right now, the water is sitting at 66°, which is a solid 6° colder than average for this time of year. That’s a proper chill – you’ll want a thick wetsuit.
The first few days are small. Friday morning the 11th you’ve got a weak 4ft swell from the NNW, but the period is short at 7 seconds and combined energy is low (203). The light cross-shore wind isn't helping enough. Surf is marginal. The afternoon actually drops off and conditions are poor. Saturday the 12th is glassy in the morning with a tiny 3ft NW swell and weak wave energy (81). It’s surfable, but very ordinary. This stretch remains pretty flat through Sunday morning.
Now, things start to get interesting Sunday the 13th afternoon. The swell jumps up to 4ft from the NW with a long period of 13 seconds, and the combined energy gets moderate (406). The wind is a clean cross-offshore from the East, so the faces will be clean. Monday the 14th keeps the clean window going: morning has 4ft NW swell (309 energy) with an East cross-off, and the afternoon turns glassy with 3ft NW swell (228 energy). These are your best early bets for a smooth, fun session.
Tuesday the 15th gets messy with a strong NNW wind kicking in, ruining the surf quality.
The real standout, the one to circle, is Thursday the 17th afternoon. The swell has built to a solid 6ft from the NW (11-second period) and the wind goes completely glassy. The combined energy is powerful (828). This is going to be the pick of the forecast – clean, punchy waves with decent size. Get on it. The morning of the 17th still has a bigger 8ft swell but the cross-on wind makes it messy and marginal.
Friday the 18th morning is still good: 5ft NW swell with a clean cross-off ESE wind. After that, conditions get blown out or too lumpy for a long stretch. The second half of the forecast window, from the 19th onwards, is dominated by strong cross-on or onshore winds from the North. The swell stays around (often a mix of 3ft to 6ft from the NW) but the wind makes it poor. There’s a long gap of nearly a week with no real recommendation through to the end of the run.
Because Castelejo is a very consistent beach and reef, this poor run is a bit frustrating, but those few windows around the 13th, 14th, and especially the 17th afternoon will be worth the wait. The longer period groundswell on the 17th will work well on the reef sections.
Stay stoked,
Rusty
Short Range ForecastMostly dry. Warm (max 27°C on Sun morning, min 22°C on Fri morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Mon morning, min 17°C on Tue night). Winds increasing (calm on Mon afternoon, strong winds from the NNW by Tue night). | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||
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 7 | NNW 7 | NW 6 | NNW 7 | NNW 7 | NNW 7 | NW 14 | NW 13 | NW 12 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | NNW 6 | NW 8 | NW 9 | NW 9 | NW 11 | NW 11 | NW 10 |
Wave Graph | |||||||||||||||||||||
127 | 76 | 35 | 56 | 66 | 48 | 130 | 380 | 396 | 309 | 198 | 115 | 77 | 46 | 229 | 543 | 904 | 989 | 1211 | 828 | 569 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | on | cross-on | glassy | glassy | cross-off | cross-off | cross-off | cross | cross-off | glassy | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | glassy | off |
High Tide | 3:19PM3.15m | 3:42AM2.92m | 3:56PM3.11m | 4:17AM2.90m | 4:32PM2.99m | 4:51AM2.81m | 5:07PM2.80m | 5:24AM2.67m | 5:42PM2.56m | 5:58AM2.50m | 6:19PM2.31m | 6:36AM2.30m | 7:02PM2.07m | ||||||||
Low Tide | 9:33PM-0.07m | 9:42AM0.04m | 10:07PM-0.01m | 10:17AM0.08m | 10:39PM0.11m | 10:52AM0.19m | 11:10PM0.29m | 11:27AM0.36m | 11:42PM0.49m | 12:03PM0.56m | 00:16AM0.72m | 12:45PM0.78m | 00:56AM0.93m | ||||||||
7:13 | — | — | 7:13 | — | — | 7:15 | — | — | 7:16 | — | — | 7:16 | — | — | 7:18 | — | — | 7:18 | — | — | |
— | 7:50 | — | — | 7:49 | — | — | 7:46 | — | — | 7:45 | — | — | 7:44 | — | — | 7:42 | — | — | 7:40 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 22 | 24 | 25 | 25 | 24 | 27 | 26 | 26 | 27 | 26 | 25 | 25 | 23 | 19 | 18 | 19 | 20 | 23 | 23 | 22 |
Feels °C | 23 | 21 | 22 | 23 | 24 | 23 | 25 | 25 | 23 | 25 | 26 | 23 | 23 | 20 | 15 | 13 | 14 | 16 | 21 | 24 | 22 |
Swell 1 Height (m) Direction Period (s) | NNW 7 | NNW 7 | NW 6 | NNW 7 | NNW 7 | NNW 7 | SE 8 | NW 13 | NW 12 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | NW 11 | WNW 10 | S 12 | NW 9 | NW 11 | NW 11 | NW 10 |
127 | 76 | 35 | 56 | 66 | 48 | 97 | 380 | 396 | 309 | 198 | 115 | 77 | 46 | 60 | 171 | 3 | 989 | 1211 | 828 | 569 | |
Swell 2 Height (m) Direction Period (s) | NNW 10 | NNW 10 | NNW 9 | SE 8 | WNW 10 | SE 8 | NNW 7 | SE 8 | SE 8 | SE 8 | SE 7 | SE 7 | NW 8 | WNW 8 | NNW 9 | S 13 | — | S 12 | NW 12 | S 11 | S 11 |
72 | 36 | 15 | 28 | 52 | 54 | 47 | 63 | 95 | 78 | 52 | 34 | 34 | 13 | 8 | 3 | — | 3 | 469 | 3 | 2 | |
Swell 3 Height (m) Direction Period (s) | W 7 | W 7 | SE 7 | NW 10 | SE 7 | WNW 9 | NW 14 | WNW 9 | — | — | WNW 9 | WNW 9 | SE 7 | SE 6 | SE 5 | S 13 | — | — | S 12 | — | S 16 |
4 | 4 | 7 | 25 | 25 | 46 | 130 | 26 | — | — | 30 | 47 | 17 | 6 | 1 | 3 | — | — | 3 | — | 5 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | ESE 8 | — | — | — | — | NW 4 | NW 4 | NNW 6 | NW 8 | NW 9 | — | — | — | — |
— | — | — | — | — | — | — | 292 | — | — | — | — | 4 | 21 | 229 | 543 | 904 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 9 | 9 | 10 | 0 | 0 | 0 | 0 | 0 | 9 | 0 | 0 | 9 | 9 | 891 | 65 | 762 | 762 | 65 | 9 | 0 | 0 |
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.










