Surf Forecasts:
Castelejo surf forecast from 17 Jul 2026:
- Most powerful swell: Tuesday 21 Jul, 1AM (local time) - 4.5ft (1.3m), 6s period, NNW swell with 123 kJ wave energy.
Best Forecast Surf Conditions for Castelejo this week:
The most powerful waves expected at Castelejo in the next 16 days are 1.3m 6s and forecast to arrive on Tuesday (Jul 21) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.1m 19s period and expected on Saturday (Jul 18) at 4PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 1AM (Tue 21st Jul) | 4.5ft (1.3m) 6s |
Table - best surf conditions forecast for Castelejo over the next 16 days.
The Lowdown
Right then, let’s have a look at what’s on the cards for the next couple of weeks.
Honestly, mate, it’s a bit of a tough stretch ahead. Right now, and for the first several days, we’re looking at a real flat spell with poor surf conditions. The wind is a constant problem, blowing onshore or cross-onshore, and the swell is tiny and weak. For the first week or so, from Friday the 17th right through to the weekend of the 26th, there’s nothing worth getting wet for. The energy is weak, with readings like 34 and 42 (moderate combined energy of all swells directed here) for the small stuff, and the wind messes up what little shape there is.
Things start to get a bit more interesting around the 27th Monday. The swell picks up, but it’s still blown out on the Monday. The real stand-out, the only true gem in this whole outlook, is Tuesday the 28th. Castelejo (beach and reef) will be the spot to be that morning. The forecast shows a clean 6ft swell from the NW with a period of 9 seconds, which is a nice, solid groundswell. And the wind? It’s going glassy. That’s a major positive. The wave energy is strong (586 combined energy of all swells directed here). It’s a classic setup for a fun session, but keep in mind that with a swell just under 6ft, it might be a bit much for complete beginners. Water temperature feels about average for the time of year.
After that glassy morning, the wind goes back onshore and the conditions get messy again. The swell stays around 6ft or a bit bigger through the rest of the week, but the wind is a killer. The Thursday the 30th and Friday the 31st look like they might be a little cleaner, but the wave quality is still marginal. The size is dropping, but the wind is still onshore or cross-onshore, so it’s going to be choppy.
Overall, the window is pretty narrow. There’s a big gap of poor surf from the start, then one standout morning – Tuesday the 28th. If you can get out then, it’ll be worth it. The rest of the time, it’s a bit of a battle with the wind.
- Rusty
Short Range ForecastMostly dry. Warm (max 20°C on Fri morning, min 18°C on Fri night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Wed afternoon, min 18°C on Mon night). Mainly fresh winds. | ||||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | |||||||||||||||
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 8 | WNW 8 | NNW 6 | NNW 5 | NW 4 | NW 5 | NW 5 | NW 5 | NNW 5 | NW 5 | NNW 7 | NNW 6 | NNW 6 | NNW 5 | NNW 5 | NNW 5 | WNW 10 | NW 5 | NNW 5 | NW 5 | NNW 6 |
Wave Graph  | |||||||||||||||||||||
 kJ | 22 | 13 | 93 | 28 | 28 | 62 | 36 | 35 | 56 | 23 | 83 | 123 | 63 | 46 | 78 | 40 | 31 | 51 | 44 | 43 | 112 |
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 | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on |
High Tide | 5:30PM3.08m | 5:59AM2.65m | 6:16PM2.92m | 6:44AM2.52m | 7:01PM2.70m | 7:31AM2.37m | 7:49PM2.46m | 8:21AM2.23m | 8:44PM2.23m | 9:20AM2.12m | 9:49PM2.06m | 10:28AM2.07m | 11:04PM1.99m | ||||||||
Low Tide | 11:10AM0.17m | 11:49PM0.09m | 11:54AM0.28m | 00:33AM0.26m | 12:39PM0.44m | 1:17AM0.45m | 1:27PM0.63m | 2:03AM0.65m | 2:21PM0.80m | 2:56AM0.83m | 3:27PM0.94m | 3:59AM0.95m | 4:45PM0.99m | ||||||||
 | |  | | |  | | | | |  | | | |  | | | | | | | |
 | 6:28 | — | — | 6:28 | — | — | 6:30 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — |
 | — | 8:53 | — | — | 8:53 | — | — | 8:52 | — | — | 8:52 | — | — | 8:52 | — | — | 8:51 | — | — | 8:51 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 20 | 19 | 20 | 20 | 19 | 20 | 20 | 19 | 20 | 20 | 19 | 20 | 20 | 19 | 20 | 21 | 19 | 21 | 21 | 19 |
Feels °C | 17 | 16 | 14 | 17 | 16 | 16 | 17 | 17 | 16 | 17 | 16 | 15 | 17 | 16 | 16 | 17 | 18 | 15 | 17 | 17 | 14 |
Swell 1 Height (m) Direction Period (s) | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 7 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 7 | WNW 11 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | WNW 9 |
| kJ | 22 | 13 | 6 | 13 | 13 | 6 | 5 | 6 | 14 | 13 | 13 | 11 | 23 | 22 | 33 | 32 | 31 | 28 | 16 | 16 | 8 |
Swell 2 Height (m) Direction Period (s) | W 6 | W 6 | — | W 5 | S 19 | W 11 | W 10 | W 9 | NNW 9 | NW 9 | WNW 12 | WNW 11 | WNW 7 | WNW 7 | NNW 9 | S 14 | SW 13 | N 10 | S 13 | S 12 | — |
| kJ | 1 | 2 | — | 1 | 7 | 2 | 8 | 7 | 8 | 12 | 15 | 12 | 5 | 5 | 16 | 4 | 7 | 2 | 3 | 3 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | NW 8 | NW 10 | NW 8 | NW 13 | SW 16 | — | S 14 | SW 14 | S 14 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 3 | 4 | 2 | 7 | 10 | — | 4 | 8 | 4 | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NW 4 | NW 4 | NNW 6 | NNW 5 | NW 4 | NW 5 | NW 5 | NW 5 | NNW 5 | NW 5 | NNW 7 | NNW 6 | NNW 6 | NNW 5 | NNW 5 | NNW 5 | NW 4 | NW 5 | NNW 5 | NW 5 | NNW 6 |
| kJ | 14 | 11 | 93 | 28 | 28 | 62 | 36 | 35 | 56 | 23 | 83 | 123 | 63 | 46 | 78 | 40 | 29 | 51 | 44 | 43 | 112 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 399 | 701 | 1215 | 390 | 347 | 245 | 382 | 390 | 245 | 317 | 385 | 178 | 303 | 92 | 254 | 245 | 9 | 254 | 179 | 289 | 737 |
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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