Surf Forecasts:
Castelejo surf forecast from 10 Sep 2026:
- Best quality surf: Monday 14 Sep, 1AM (local time) - 4.5ft (1.3m), 12s period, NW swell with glassy winds.
- Most powerful swell: Monday 14 Sep, 1AM (local time) - 4.5ft (1.3m), 12s period, NW swell with 503 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 4AM (local time) - 2.5ft (0.8m), 7s period with NNW 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 Sunday (Sep 13) at 4AM. The primary swell is predicted to be 0.8m and 7s 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 1.3m 12s and forecast to arrive on Monday (Sep 14) at 1AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 8s period and expected on Sunday (Sep 13) at 10AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Sun 13th Sep) | 2.5ft (0.8m) 7s |
| Best Surf | 1AM (Mon 14th Sep) | 4.5ft (1.3m) 12s |
| Most Powerful | 1AM (Mon 14th Sep) | 4.5ft (1.3m) 12s |
Table - best surf conditions forecast for Castelejo over the next 16 days.
The Lowdown
Alright folks, Rusty here with a look at what Castelejo’s got brewing over the next couple of weeks.
It’s a slow start. The first few days are pretty grotty with onshore winds and messy, weak surf. Honestly, nothing worth paddling out for until Sunday the 13th. That’s when things finally start to look up.
The standout window is Sunday afternoon the 13th through Monday the 14th. Sunday afternoon, the wind goes glassy and we get a clean 4ft groundswell from the NW with a solid 13-second period. The energy jumps up (469) and the water is feeling about average for this time of year. Monday morning keeps it clean with a light offshore ESE breeze and a 4ft NW swell at 11 seconds (391). That’s your best bet for a proper session—clean, rippable, and fun.
After that, it gets a bit scrappy again through the middle of the week with fresh onshores and lumpy conditions. Not worth your time.
But hang in there, because the real gem is on the 21st of September. The Monday afternoon session looks absolutely pumping. We’re talking a clean 8ft NW groundswell with a very long 14-second period, and it’s glassy as a lake. The energy is massive (2599), but at that size, it's serious—only for experienced surfers. The morning of the 21st is also excellent with a clean 7ft NNW swell (1147). That Monday is the true standout of the whole outlook, but it's over a week away so treat it as promising but not locked in.
There’s a notable spike again on the 24th with a very long 17-second period NW swell, but it's a bit cross-on and the conditions are only marginal. While the energy is high (1298), the wind’s not doing it any favours. That long period will want a point or reef, and Castelejo is a beach and reef setup that can get a bit straight under those conditions.
So, to sum it up: the best surf on offer is Sunday the 13th and Monday the 14th for clean, manageable waves, and the big standout is the 21st for the experienced crew. There are some gaps in the middle, but the forecast can change.
Stay stoked.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Sat morning, min 18°C on Wed night). Winds decreasing (strong winds from the NNW on Wed night, light winds from the NNW by Fri morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Sun morning, min 20°C on Tue afternoon). Winds increasing (calm on Sun morning, fresh winds from the NNW by Tue afternoon). | ||||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | |||||||||||||||
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 8 | NW 7 | NNW 7 | NW 7 | NW 7 | NNW 6 | NW 7 | NW 7 | NW 7 | NW 14 | NW 13 | NW 12 | NW 11 | NW 11 | NW 10 | NW 9 | NNW 8 | NW 6 | NW 7 | NW 8 | NW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 329 | 156 | 266 | 143 | 91 | 49 | 67 | 67 | 46 | 130 | 444 | 503 | 391 | 293 | 188 | 117 | 48 | 195 | 273 | 305 | 497 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross | on | cross-on | cross-on | on | cross | cross | glassy | glassy | off | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on |
High Tide | 2:40PM3.10m | 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 | 8:26AM0.17m | 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 | — | — | 7:13 | — | — | 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 | 21 | 20 | 22 | 22 | 23 | 25 | 25 | 24 | 27 | 25 | 25 | 26 | 25 | 25 | 26 | 22 | 19 | 18 | 19 | 18 |
Feels °C | 18 | 18 | 17 | 20 | 21 | 21 | 23 | 24 | 23 | 26 | 25 | 25 | 25 | 23 | 23 | 22 | 19 | 15 | 13 | 14 | 13 |
Swell 1 Height (m) Direction Period (s) | NW 8 | NNW 10 | NNW 7 | NW 7 | NW 7 | NNW 6 | NW 7 | NW 7 | NW 7 | NW 8 | NW 13 | NW 12 | NW 11 | NW 11 | NW 10 | NW 9 | NNW 8 | NW 11 | NW 10 | WNW 10 | NW 10 |
| kJ | 329 | 117 | 266 | 143 | 91 | 49 | 67 | 67 | 46 | 57 | 444 | 503 | 391 | 293 | 188 | 117 | 48 | 60 | 110 | 171 | 151 |
Swell 2 Height (m) Direction Period (s) | NW 10 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | SE 8 | WNW 10 | WNW 9 | SE 8 | SE 7 | SE 8 | SE 7 | SE 7 | SE 7 | SE 6 | WNW 8 | NW 9 | S 13 | SW 12 | — |
| kJ | 25 | 42 | 60 | 54 | 30 | 16 | 31 | 54 | 46 | 78 | 33 | 37 | 34 | 15 | 8 | 6 | 13 | 3 | 3 | 6 | — |
Swell 3 Height (m) Direction Period (s) | NNW 12 | W 11 | — | W 7 | W 7 | SE 8 | WNW 10 | SE 7 | SE 8 | NW 14 | WNW 9 | — | — | — | — | NW 13 | WNW 12 | — | — | — | — |
| kJ | 15 | 2 | — | 4 | 4 | 9 | 19 | 24 | 41 | 130 | 25 | — | — | — | — | 7 | 15 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | NW 7 | — | — | — | — | — | — | — | — | — | — | — | — | NW 4 | NNW 4 | NW 4 | NW 6 | NW 7 | NW 8 | NW 8 |
| kJ | — | 156 | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 11 | 29 | 195 | 273 | 305 | 497 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 46 | 653 | 46 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 0 | 0 | 0 | 250 | 9 | 9 | 713 | 65 | 307 | 629 | 76 |
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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