
Surf Forecasts:
Castelejo surf forecast from 3 Sep 2026:
- Best quality surf: Thursday 10 Sep, 1PM (local time) - 2.5ft (0.8m), 10s period, NNW swell with glassy winds.
- Most powerful swell: Tuesday 8 Sep, 4PM (local time) - 6.5ft (2.0m), 10s period, NW swell with 738 kJ wave energy.
- Next surfable swell (1★+): Thursday 3 Sep, 4PM (local time) - 2.5ft (0.7m), 7s 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 Thursday (Sep 03) at 4PM. The primary swell is predicted to be 0.7m and 7s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Castelejo in the next 16 days are 2.0m 10s and forecast to arrive on Tuesday (Sep 08) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 6s period and expected on Thursday (Sep 03) at 4PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4PM (Thu 3rd Sep) | 2.5ft (0.7m) 7s |
| Best Surf | 1PM (Thu 10th Sep) | 2.5ft (0.8m) 10s |
| Most Powerful | 4PM (Tue 8th Sep) | 6.5ft (2.0m) 10s |
Table - best surf conditions forecast for Castelejo over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a proper look at what’s lined up for us over the next couple of weeks at Castelejo. It’s a bit of a mixed bag, so let’s get into it.
Right out of the gate, we’ve got a little window of opportunity to start the period. Thursday morning the 3rd sees a clean 3ft NW swell with a short 7-second period, and a light cross-offshore breeze from the ENE. The water is sitting at 66°, which is a massive 5° colder than normal for this time of year – that’s seriously unusual, so you’ll want a thick steamer. The combined energy is weak at 110, so it’s not packing much punch, but it’s surfable and clean. The afternoon drops to 2ft but stays clean with a gentle offshore. It’s nothing to write home about, but it’s a start.
Then we hit a long, dry spell. From Friday the 4th all the way through Tuesday the 15th of September, the conditions are pretty grim. The wind is nearly always onshore or cross-onshore, often fresh and lumpy, and the wave quality is poor. The swell sticks around, with some pulses of moderate energy (like a 428 on the 6th and a 553 on the 7th), but the wind just ruins it. The combined energy hits a strong 667 on the afternoon of the 8th, but with a 6ft NW swell and a fresh 22 mph cross-onshore, it’s a messy, choppy mess – more of a kite-surfing set-up than a paddle session. That long stretch of poor conditions is a real bummer, lasting over a week.
The real standout, and the one to circle on your calendar, is Thursday the 17th – morning session. This is the best on offer across the whole 16 days. We’ve got a 4ft NW groundswell with a very long 13-second period, pushing moderate energy of 480. The wind is glassy – a perfect 3 mph from the north. That means the surface will be like a mirror, and that long-period swell will wrap in with some proper shape. It’s a beach and reef set-up here, so those long-period waves might wall up a bit, but with glassy conditions, it’ll be worth the paddle. The water will still be freezing, but it’s the only truly clean, quality window we have.
The day before, on Wednesday the 16th morning, there’s a massive pulse of energy (1385) with a 6ft WNW swell and a 15-second period, but the wind is a light cross-onshore. It’s rated as marginal, and with that size and period, it’s going to be a big, powerful, and challenging wave – strictly for experts, and the wind not being perfect is a bit of a letdown.
So, to sum it up: a small, clean start on the 3rd, a long, windy, poor-quality gap in the middle, and then a genuine, glassy gem on the morning of the 17th. After that, it fades again. The 17th is the day to make a plan.
Rusty.
Short Range ForecastMostly dry. Warm (max 34°C on Fri afternoon, min 22°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Sun morning, min 17°C on Mon night). Winds increasing (light winds from the NW on Sun morning, strong winds from the NNW by Mon afternoon). | ||||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | |||||||||||||||
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) | NW 7 | NW 7 | WNW 8 | WNW 8 | WNW 8 | NW 8 | NW 9 | NW 9 | NW 14 | NW 12 | NW 12 | NW 11 | WNW 13 | WNW 12 | WNW 11 | NW 11 | NW 10 | NW 8 | NW 8 | NNW 8 | NNW 7 |
Wave Graph | |||||||||||||||||||||
102 | 47 | 48 | 47 | 45 | 66 | 81 | 81 | 164 | 330 | 268 | 186 | 373 | 461 | 334 | 297 | 738 | 544 | 408 | 330 | 324 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | cross-on | cross-on | cross-off | on | cross | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on |
High Tide | 7:22PM2.33m | 7:54AM2.29m | 8:37PM2.14m | 9:19AM2.20m | 10:17PM2.07m | 10:55AM2.27m | 11:47PM2.19m | 12:12PM2.48m | 00:52AM2.39m | 1:10PM2.73m | 1:43AM2.60m | 1:58PM2.95m | 2:26AM2.77m | ||||||||
Low Tide | 1:01PM0.59m | 1:28AM0.71m | 2:10PM0.77m | 2:45AM0.88m | 3:48PM0.84m | 4:26AM0.92m | 5:29PM0.73m | 5:54AM0.77m | 6:41PM0.50m | 6:56AM0.56m | 7:34PM0.26m | 7:44AM0.34m | 8:18PM0.07m | ||||||||
7:07 | — | — | 7:07 | — | — | 7:09 | — | — | 7:09 | — | — | 7:09 | — | — | 7:11 | — | — | 7:11 | — | — | |
— | 8:01 | — | — | 8:00 | — | — | 7:59 | — | — | 7:58 | — | — | 7:55 | — | — | 7:54 | — | — | 7:52 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 30 | 31 | 28 | 28 | 34 | 30 | 31 | 25 | 24 | 26 | 24 | 23 | 23 | 21 | 20 | 19 | 19 | 18 | 21 | 20 | 20 |
Feels °C | 28 | 30 | 27 | 28 | 32 | 28 | 29 | 24 | 25 | 25 | 22 | 20 | 18 | 17 | 16 | 15 | 14 | 12 | 18 | 16 | 17 |
Swell 1 Height (m) Direction Period (s) | NW 7 | NW 7 | WNW 8 | WNW 8 | WNW 8 | NW 10 | NW 9 | NW 9 | NW 9 | NW 12 | NW 12 | NW 11 | WNW 13 | WNW 12 | WNW 11 | NW 11 | — | — | — | — | NW 12 |
102 | 47 | 48 | 47 | 45 | 25 | 81 | 81 | 118 | 330 | 268 | 166 | 373 | 461 | 334 | 263 | — | — | — | — | 24 | |
Swell 2 Height (m) Direction Period (s) | SW 14 | SE 5 | NNW 7 | NNW 6 | NNW 6 | SE 5 | NW 5 | NW 5 | NW 14 | NW 9 | WNW 8 | WNW 15 | NNW 10 | — | — | NW 11 | — | — | — | — | W 14 |
8 | 14 | 25 | 15 | 12 | 1 | 20 | 11 | 164 | 126 | 62 | 174 | 64 | — | — | 76 | — | — | — | — | 4 | |
Swell 3 Height (m) Direction Period (s) | SE 6 | NW 9 | SE 6 | SE 6 | SE 6 | SW 13 | SE 4 | NW 16 | ESE 5 | SE 6 | ESE 6 | WNW 9 | WNW 9 | — | — | — | — | — | — | — | — |
2 | 21 | 8 | 10 | 5 | 7 | 1 | 10 | 3 | 11 | 3 | 17 | 31 | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | ESE 6 | — | — | NNW 6 | NW 8 | — | S 2 | — | — | NNW 5 | NW 6 | NNW 7 | NW 6 | NNW 7 | NNW 7 | NW 10 | NW 8 | NW 8 | NNW 8 | NNW 7 |
— | 55 | — | — | 12 | 66 | — | 1 | — | — | 27 | 186 | 150 | 167 | 324 | 297 | 738 | 544 | 408 | 330 | 324 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 25 | 179 | 10 | 46 | 9 | 0 | 9 | 9 | 9 | 20 | 20 | 257 | 20 | 20 | 458 | 77 | 65 | 609 | 65 |
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.










