Surf Forecasts:
Castelejo surf forecast from 13 Aug 2026:
- Best quality surf: Monday 17 Aug, 10AM (local time) - 6ft (1.8m), 9s period, NW swell with glassy winds.
- Most powerful swell: Saturday 15 Aug, 10PM (local time) - 8ft (2.4m), 8s period, NNW swell with 769 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 10AM (local time) - 6ft (1.8m), 9s 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 Monday (Aug 17) at 10AM. The primary swell is predicted to be 1.8m and 9s period with a secondary swell of 0.1m and 15s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Castelejo in the next 16 days are 2.4m 8s and forecast to arrive on Saturday (Aug 15) 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 0.3m 3s period and expected on Monday (Aug 17) at 4PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Mon 17th Aug) | 6ft (1.8m) 9s |
| Best Surf | 10AM (Mon 17th Aug) | 6ft (1.8m) 9s |
| Most Powerful | 10PM (Sat 15th Aug) | 8ft (2.4m) 8s |
Table - best surf conditions forecast for Castelejo over the next 16 days.
The Lowdown
Alright, surfers, Rusty here with a look at what's cookin' for the next two weeks. This one's a slow burner, so strap in.
Right off the bat, we've got a bit of a wait. The first five days are pretty much a write-off for a decent paddle. From Thursday the 13th through Monday the 17th morning, it's blowing onshore or cross-onshore, making a mess of things. The waves that are around are small to barely 7ft, but that doesn't matter when the wind is trashing 'em. You'd be better off staying in bed.
Things finally turn the corner on Monday morning, the 17th. We’ve got a solid NW groundswell rolling in, pushing 6ft on average with a period over 9 seconds. The combined swell energy is strong at 501, but the real story is the glassy conditions. The wind drops to nothing, and Castelejo is looking clean and inviting. That’s your first real chance to get some proper waves under you.
The quality fades after that, with a couple of clean but ordinary days on Tuesday and Wednesday the 18th and 19th as the swell drops off to 4ft and then 3ft. It gets pretty weak with the energy falling to just 90 on Wednesday.
Now, here’s where we might have a standout. Mark your calendar for Thursday the 20th. Another swell arrives, this time from the NW with a period that stretches out to 12 seconds – proper groundswell. That morning, we’ve got glassy conditions again, clean as a whistle, with 3ft waves. The combined energy reading is a solid 345. This is a great setup for a longboard at Castelejo (Portugal), where that longer period will wrap in nicely for some mellow, lined-up rides.
Keep in mind, this place is very consistent, which is a positive, and the water temperature is about average for this time of year. Just watch out for the crowds, as it can get busy, but for that Thursday morning window, it’s a high-quality, clean option.
The window closes quickly, though. Thursday afternoon gets bumpy again, and from Friday the 21st all the way through to Tuesday the 26th, it’s a long, frustrating stretch of onshore winds and messy, often over-7ft swell. That energy gets up near 600 on Saturday, but with 22 mph winds on it, that’s more of a kite-surfing scene than a clean surf session. It’s rough out there.
The very end of the run, around Wednesday the 27th and Thursday the 28th, the swell drops back down to 3ft to 4ft, but the wind stays cross-onshore, so it’s still nothing to get excited about.
The call: The one real standout is Thursday the 20th. Get out there in the morning for glassy 3ft groundswell at Castelejo. The Monday the 17th is also a decent option, but that Thursday has the better quality.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Thu morning, min 19°C on Fri night). Winds increasing (light winds from the NNW on Thu morning, strong winds from the NNW by Fri night). | Days 4-6 Weather SummaryMostly dry. Warm (max 22°C on Sun morning, min 20°C on Sat night). Winds decreasing (strong winds from the NNW on Sat night, calm by Mon morning). | ||||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||
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 10 | WNW 10 | WNW 10 | WNW 9 | NW 9 | NNW 7 | NW 8 | NW 8 | NW 8 | NW 9 | NW 9 | NW 8 | NW 9 | NW 9 | NNW 8 | NW 8 | NNW 8 | NNW 8 | NNW 8 | NW 8 | NW 14 |
Wave Graph | |||||||||||||||||||||
163 | 123 | 190 | 136 | 351 | 440 | 423 | 599 | 733 | 643 | 493 | 479 | 493 | 380 | 235 | 151 | 169 | 114 | 76 | 62 | 103 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | glassy | cross-off | cross | cross-off | cross-off | glassy | cross-off | cross | glassy |
High Tide | 3:42PM3.20m | 4:08AM2.88m | 4:23PM3.20m | 4:47AM2.85m | 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 | ||||||||
Low Tide | 9:25AM0.08m | 9:59PM-0.10m | 10:06AM0.04m | 10:38PM-0.06m | 10:45AM0.09m | 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 | |||||||
6:50 | — | — | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | |
— | 8:30 | — | — | 8:29 | — | — | 8:28 | — | — | 8:27 | — | — | 8:24 | — | — | 8:23 | — | — | 8:22 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 22 | 21 | 22 | 21 | 20 | 21 | 21 | 20 | 22 | 22 | 21 | 22 | 22 | 22 | 22 | 22 | 21 | 24 | 24 | 22 |
Feels °C | 23 | 20 | 19 | 19 | 18 | 15 | 18 | 18 | 14 | 22 | 22 | 21 | 24 | 22 | 24 | 24 | 23 | 22 | 24 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | WNW 10 | WNW 10 | WNW 9 | SE 5 | — | S 18 | S 18 | SW 16 | NW 9 | NW 9 | NW 8 | NW 9 | NW 9 | NNW 8 | NW 8 | NNW 8 | NNW 8 | NNW 8 | NW 8 | NNW 7 |
163 | 123 | 190 | 136 | 1 | — | 6 | 6 | 10 | 643 | 493 | 479 | 493 | 380 | 235 | 151 | 169 | 114 | 76 | 62 | 48 | |
Swell 2 Height (m) Direction Period (s) | NNW 9 | WNW 12 | — | S 12 | — | — | S 18 | S 18 | — | SW 16 | SW 16 | SW 15 | SW 15 | SW 16 | W 9 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | NW 14 |
8 | 56 | — | 3 | — | — | 6 | 6 | — | 10 | 9 | 8 | 8 | 10 | 1 | 6 | 6 | 6 | 6 | 6 | 103 | |
Swell 3 Height (m) Direction Period (s) | NW 9 | NNW 9 | — | — | — | — | — | — | — | — | — | — | — | S 13 | SW 16 | SW 16 | SW 15 | SW 14 | SW 14 | SW 14 | WNW 10 |
3 | 8 | — | — | — | — | — | — | — | — | — | — | — | 4 | 10 | 10 | 9 | 8 | 8 | 7 | 18 | |
Wind waves Height (m) Direction Period (s) | NNW 6 | NW 6 | NNW 6 | NNW 7 | NW 9 | NNW 7 | NW 8 | NW 8 | NW 8 | — | — | — | — | SE 3 | — | — | SSW 2 | — | — | SSW 3 | — |
40 | 31 | 115 | 91 | 351 | 440 | 423 | 599 | 733 | — | — | — | — | 1 | — | — | 1 | — | — | 2 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 9 | 9 | 65 | 65 | 307 | 65 | 73 | 749 | 307 | 9 | 9 | 9 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 4 | 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.











