Surf Forecasts:
Castelejo surf forecast from 10 Sep 2026:
- Best quality surf: Sunday 13 Sep, 1PM (local time) - 3ft (0.9m), 10s period, NW swell with cross-offshore winds.
- Most powerful swell: Thursday 17 Sep, 10PM (local time) - 6ft (1.8m), 10s period, NW swell with 735 kJ wave energy.
- Next surfable swell (1★+): Friday 11 Sep, 1PM (local time) - 3.5ft (1.1m), 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 Friday (Sep 11) at 1PM. The primary swell is predicted to be 1.1m and 7s period with a secondary swell of 0.5m and 9s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Castelejo in the next 16 days are 1.8m 10s and forecast to arrive on Thursday (Sep 17) 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 1.4m 8s period and expected on Sunday (Sep 13) at 1PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1PM (Fri 11th Sep) | 3.5ft (1.1m) 7s |
| Best Surf | 1PM (Sun 13th Sep) | 3ft (0.9m) 10s |
| Most Powerful | 10PM (Thu 17th Sep) | 6ft (1.8m) 10s |
Table - best surf conditions forecast for Castelejo over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s look at Castelejo for the next couple of weeks.
The start is a total bust. From now through Saturday the 12th, there’s nothing worth getting wet for. Onshore to cross-onshore wind, weak swell, and energy readings in the low hundreds – 307, 197, 112 – just not happening.
First sign of life is Sunday morning the 13th. Small 2ft from the NW with a long 14-second period, but finally a clean look with a light cross-offshore breeze from the ENE. Energy is only 177 – weak, but at least it’s clean.
The pick of the first week is Sunday afternoon the 13th through Monday the 14th. Sunday arvo brings 2-3ft of NW groundswell at 13 seconds, light cross-offshore wind from the East, and energy at 310. Monday morning is your best bet: 3-4ft waves, 11-second period, cross-offshore breeze from the ENE, and energy at 315. Clean, small, and fun. Grab that morning session.
Then it goes to hell. Tuesday the 15th through Saturday the 19th is a long blank stretch. Cross-onshore winds, fresh breezes hitting 18 mph on Tuesday arvo, and by Wednesday the 16th we’ve got lumpy, messy 6ft junk with a short 7-second period. Energy jumps to 635 and then 652 on Thursday, but the wind ruins it. This is kite-surfing conditions, not a surfboard wave.
The real standout is all the way at the end. Circle Monday the 21st of September. That morning gives us a clean 4-5ft of NW groundswell with a beautiful 14-second period. Offshore wind from the East at just 9 mph. Energy is a strong 661. This is the top of the forecast: good size, long period, offshore wind, clean as a whistle. It’s more than a week out, so don’t book your travel yet, but this is the one to watch. The afternoon is equally solid with 4-5ft and a 13-second period, even lighter wind, and energy at 585.
Tuesday the 22nd stays clean with 3-4ft waves at 11 seconds and a nice offshore from the ESE. Energy is 242 – not a beast, but with that wind, it’ll be a great small-wave day.
Sunday the 20th offers a tiny 3ft wave with a clean offshore in the morning, but it’s just an appetizer for Monday the 21st. That Monday is the main course.
Water temp is sitting at 66°F right now, which is about 5°F colder than normal. That’s a serious chill – you’ll want a thick wetsuit, boots, and probably a hood.
Rusty out.
Short Range ForecastMostly dry. Warm (max 26°C on Sat morning, min 19°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Mon morning, min 17°C on Tue night). Winds increasing (calm on Mon morning, strong winds from the NNW by Tue night). | |||||||||||||||||||
Thu 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | ||||||||||||||
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 8 | NNW 7 | NW 7 | NNW 7 | NNW 6 | NNW 6 | NNW 7 | NNW 8 | NW 14 | NW 13 | NW 12 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | NW 6 | NW 7 | NNW 8 | NW 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 186 | 302 | 139 | 78 | 69 | 52 | 66 | 72 | 130 | 242 | 442 | 315 | 198 | 137 | 77 | 46 | 188 | 340 | 447 | 572 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross | on | cross-on | cross-on | on | cross-off | cross-off | cross-off | cross | cross-off | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on |
High Tide | 3:05AM2.88m | 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 | ||||||||
Low Tide | 8:57PM-0.04m | 9:05AM0.07m | 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 | |||||||
 |  | | | | | | | | | | | | | | | | | | | |
 | — | — | 7:13 | — | — | 7:13 | — | — | 7:15 | — | — | 7:16 | — | — | 7:16 | — | — | 7:18 | — | — |
 | 7:52 | — | — | 7:50 | — | — | 7:49 | — | — | 7:46 | — | — | 7:45 | — | — | 7:44 | — | — | 7:42 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 20 | 22 | 22 | 23 | 26 | 25 | 24 | 26 | 26 | 24 | 27 | 25 | 24 | 26 | 23 | 20 | 18 | 18 | 19 |
Feels °C | 18 | 17 | 20 | 22 | 22 | 24 | 24 | 23 | 25 | 25 | 24 | 25 | 23 | 22 | 22 | 20 | 16 | 13 | 13 | 16 |
Swell 1 Height (m) Direction Period (s) | NW 10 | NNW 10 | NW 7 | NNW 7 | NNW 6 | NNW 6 | NNW 7 | NNW 8 | SE 8 | NW 13 | NW 12 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | WNW 11 | NW 10 | NW 10 | WNW 10 |
| kJ | 77 | 62 | 139 | 78 | 69 | 52 | 66 | 72 | 97 | 242 | 442 | 315 | 198 | 137 | 77 | 46 | 82 | 110 | 188 | 135 |
Swell 2 Height (m) Direction Period (s) | NNW 11 | — | NNW 10 | NNW 10 | SE 7 | SE 8 | WNW 10 | SE 8 | NNW 7 | SE 8 | SE 8 | SE 8 | SE 7 | NW 9 | SE 7 | WNW 8 | NNW 9 | S 13 | S 12 | S 12 |
| kJ | 42 | — | 54 | 30 | 7 | 31 | 52 | 55 | 47 | 63 | 95 | 77 | 41 | 67 | 16 | 14 | 8 | 3 | 3 | 3 |
Swell 3 Height (m) Direction Period (s) | W 11 | — | W 7 | W 7 | NNW 9 | NW 10 | SE 7 | WNW 9 | NW 14 | NNW 9 | — | — | WNW 9 | SE 7 | WNW 8 | NW 12 | SE 5 | S 13 | — | — |
| kJ | 2 | — | 4 | 4 | 16 | 25 | 24 | 54 | 130 | 68 | — | — | 31 | 34 | 28 | 38 | 1 | 3 | — | — |
Wind waves Height (m) Direction Period (s) | NW 8 | NNW 7 | — | — | — | — | — | — | — | SE 8 | — | — | — | — | NW 4 | NNW 4 | NW 6 | NW 7 | NNW 8 | NW 9 |
| kJ | 186 | 302 | — | — | — | — | — | — | — | 255 | — | — | — | — | 5 | 13 | 188 | 340 | 447 | 572 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 9 | 46 | 9 | 9 | 9 | 9 | 1 | 0 | 0 | 0 | 9 | 0 | 9 | 9 | 9 | 390 | 65 | 76 | 265 | 20 |
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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