Surf Forecasts:
Castelejo surf forecast from 13 Sep 2026:
- Best quality surf: Sunday 20 Sep, 7AM (local time) - 5ft (1.6m), 13s period, NW swell with cross-offshore winds.
- Most powerful swell: Saturday 19 Sep, 10AM (local time) - 7ft (2.1m), 14s period, NW swell with 1,704 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 7AM (local time) - 2.5ft (0.8m), 8s 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 7AM. The primary swell is predicted to be 0.8m and 8s 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 2.1m 14s and forecast to arrive on Saturday (Sep 19) at 10AM. 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+) | 7AM (Sun 13th Sep) | 2.5ft (0.8m) 8s |
| Best Surf | 7AM (Sun 20th Sep) | 5ft (1.6m) 13s |
| Most Powerful | 10AM (Sat 19th Sep) | 7ft (2.1m) 14s |
Table - best surf conditions forecast for Castelejo over the next 16 days.
The Lowdown
Alright, Rusty here with a look at Castelejo.
We’ve got a solid stretch of surf coming, but you’re gonna have to work through some windy, messy days to get to the real quality. The first few days are clean and small, then we hit a rough patch, but the end of the first week and the start of the second week have some absolute crackers.
Sunday the 13th starts small. The morning has a waist-high NW swell, around 2ft, but the afternoon is the pick of the weekend. Glassy conditions, clean 4ft NW swell with a decent 13-second period. Wave energy is moderate. Not a big day, but for a Sunday it’ll be a fun, clean little session.
Monday the 14th is similar and clean in the morning, but the wind shifts cross-on by the afternoon, putting a little bump on the surface. Still surfable.
From Tuesday the 15th to Friday the 18th, it’s all onshore and choppy. The swell gets big – 7 or 8ft from Wednesday – but with strong NNW winds, it’s messy and poor quality. The wave energy is strong (over 1000 on Wednesday and Thursday), but you’d be fighting a losing battle on a paddle board. That’s kite-surfing territory.
Saturday the 19th morning sees a big 7ft NW groundswell with a very long 14-second period and huge energy (1999). But the cross-on wind makes it marginal. It’s big, powerful, and for experts only.
The standout session is Sunday the 20th morning. Glassy, clean, with a 5ft NW groundswell and a 12-second period. Light offshore breeze. It’s clean, fun, and the best quality you’ll get. Crowds are sometimes an issue, so expect to share the peaks.
Monday the 21st is another big day around 7ft with a 14-second period, but the wind is messy again. For experienced surfers only.
Tuesday the 22nd morning is a beauty for the experienced crew. A 6ft NW groundswell, 13-second period, with clean cross-off winds. Strong energy (1109), but manageable. Powerful and clean.
The rest of the second week continues to improve. Wednesday the 23rd has gentle offshore winds and clean 4-5ft NW swell. A great day.
Thursday the 24th and Friday the 25th offer clean fun waves in the 3-5ft range with light winds. Friday afternoon is a bonus – clean, 5ft, and glassy.
After that, the weekend of the 27th and 28th gets smaller and turns onshore again. The run fades out by Monday the 28th with just 3ft NW swell, clean but small.
So lock in Sunday the 20th morning for the best all-around fun, and Tuesday the 22nd morning if you want bigger, cleaner power. The water temp is about normal for the time of year.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Sun morning, min 19°C on Tue afternoon). Winds increasing (calm on Mon morning, fresh winds from the NNW by Tue afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Thu afternoon, min 17°C on Tue night). Winds decreasing (strong winds from the NNW on Tue night, light winds from the NW by Fri afternoon). | ||||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 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) | NW 14 | NW 13 | NW 12 | NW 12 | NW 11 | NW 11 | NW 10 | NW 10 | NW 6 | NW 8 | NW 9 | NW 9 | NW 10 | NW 11 | NW 10 | NW 10 | NNW 9 | NW 16 | NW 14 | NW 14 | NW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 130 | 380 | 442 | 338 | 202 | 134 | 77 | 46 | 188 | 789 | 904 | 1129 | 1040 | 1009 | 910 | 782 | 591 | 719 | 1704 | 825 | 976 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | cross | cross-off | cross-on | cross-on | cross-on | on | cross-on | cross-on | on | on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 4:17AM2.90m | 4:32PM2.99m | 4:51AM2.81m | 5:07PM2.80m | 5:24AM2.67m | 5:42PM2.56m | 5:58AM2.50m | 6:19PM2.31m | 6:36AM2.30m | 7:02PM2.07m | 7:24AM2.10m | 8:04PM1.87m | 8:40AM1.95m | 9:44PM1.77m | |||||||
Low Tide | 10:17AM0.08m | 10:39PM0.11m | 10:52AM0.19m | 11:10PM0.29m | 11:27AM0.36m | 11:42PM0.49m | 12:03PM0.56m | 00:16AM0.72m | 12:45PM0.78m | 00:56AM0.93m | 1:40PM0.99m | 1:56AM1.12m | 3:10PM1.13m | 3:40AM1.20m | |||||||
 | |  | | | | | | |  | | | | | | | | | | | | |
 | 7:15 | — | — | 7:16 | — | — | 7:16 | — | — | 7:18 | — | — | 7:18 | — | — | 7:18 | — | — | 7:20 | — | — |
 | — | 7:46 | — | — | 7:45 | — | — | 7:44 | — | — | 7:42 | — | — | 7:40 | — | — | 7:38 | — | — | 7:37 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 24 | 25 | 25 | 25 | 23 | 21 | 18 | 18 | 18 | 18 | 20 | 21 | 20 | 20 | 20 | 22 | 23 | 22 | 24 |
Feels °C | 25 | 26 | 23 | 24 | 24 | 24 | 21 | 19 | 14 | 13 | 12 | 12 | 18 | 18 | 16 | 19 | 19 | 20 | 24 | 20 | 22 |
Swell 1 Height (m) Direction Period (s) | SE 8 | NW 13 | NW 12 | NW 12 | NW 11 | NW 11 | NW 10 | NW 10 | NW 11 | S 13 | S 12 | WNW 11 | NW 10 | NW 11 | NW 10 | NW 10 | NNW 9 | NW 9 | NW 14 | NW 14 | NW 13 |
| kJ | 75 | 380 | 442 | 338 | 202 | 134 | 77 | 46 | 60 | 3 | 3 | 200 | 1040 | 1009 | 910 | 782 | 591 | 316 | 1704 | 825 | 976 |
Swell 2 Height (m) Direction Period (s) | NNW 7 | SE 8 | SE 8 | SE 7 | SE 7 | WNW 9 | SE 6 | WNW 8 | SE 5 | S 13 | S 12 | S 12 | S 12 | SW 11 | SW 16 | NW 21 | NW 19 | NW 16 | NW 8 | NW 9 | SE 8 |
| kJ | 48 | 57 | 50 | 44 | 29 | 32 | 6 | 13 | 1 | 3 | 3 | 3 | 3 | 5 | 10 | 17 | 89 | 719 | 295 | 268 | 20 |
Swell 3 Height (m) Direction Period (s) | NW 14 | WNW 9 | — | — | WNW 9 | SE 7 | NW 13 | WNW 12 | ESE 5 | — | — | — | — | — | — | S 14 | S 14 | S 14 | ESE 6 | SE 6 | S 13 |
| kJ | 130 | 26 | — | — | 31 | 18 | 7 | 14 | 2 | — | — | — | — | — | — | 4 | 4 | 4 | 15 | 9 | 3 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | NW 4 | NW 8 | NNW 4 | NW 6 | NW 8 | NW 9 | NW 9 | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 4 | 43 | 13 | 188 | 789 | 904 | 1129 | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 9 | 0 | 9 | 9 | 9 | 773 | 77 | 762 | 748 | 20 | 9 | 9 | 65 | 9 | 9 | 9 | 9 | 9 | 9 |
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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