
Surf Forecasts:
Coxos surf forecast from 9 Sep 2026:
- Best quality surf: Sunday 13 Sep, 10AM (local time) - 3.5ft (1.1m), 13s period, NW swell with glassy winds.
- Most powerful swell: Thursday 10 Sep, 4PM (local time) - 6ft (1.8m), 11s period, NNW swell with 759 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 7AM (local time) - 3ft (0.9m), 14s period with NW swell.
Best Forecast Surf Conditions for Coxos this week:
The surf forecast for Coxos 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 0.9m and 14s period with a secondary swell of 0.8m and 7s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Coxos in the next 16 days are 1.8m 11s and forecast to arrive on Thursday (Sep 10) 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 0.2m 5s period and expected on Monday (Sep 14) at 10AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sun 13th Sep) | 3ft (0.9m) 14s |
| Best Surf | 10AM (Sun 13th Sep) | 3.5ft (1.1m) 13s |
| Most Powerful | 4PM (Thu 10th Sep) | 6ft (1.8m) 11s |
Table - best surf conditions forecast for Coxos over the next 16 days.
The Lowdown
Alright, Rusty here, and I’ve got a look at the next couple of weeks for us. It’s a bit of a mixed bag, so let’s get into it.
Right off the bat, we’re looking at a rough stretch. From Tuesday afternoon through to Saturday, the wind is howling from the north and northwest, mostly cross-on, and it's making a mess of things. The surf is there, but it’s blown out and lumpy. For a spot like Coxos (reef), that’s a no-go. Not worth paddling out for. We’re seeing moderate to strong combined wave energy (up to 772), but it’s all wasted on the wind. The water temp is sitting at 68°, which is about normal for this time of year, nothing to write home about.
Now, the first real standout comes on Sunday, the 13th of September. The morning is looking glassy with a light offshore breeze from the SE. Swell is a clean 4 ft from the NW, with a long period of 13 seconds. That’s groundswell, and it’s bringing a solid 525 combined energy. The sets will be a bit more spaced out, but the shape at Coxos should be fantastic. This is the best on offer for the first week – it’s a window of quality.
Monday morning, the 14th, is also worth a mention. Another glassy morning with a light offshore, and a 4 ft NW swell at 11 seconds. The wave energy is still strong (406). It’s not quite as good as Sunday, but it’s still a very clean option.
After that, things get a bit messy again. The wind turns cross-on and the sizes drop, though we do see a pulse of bigger swell around the 18th and 19th of September. Friday the 18th has a solid 8 ft wave from the NNW, but it’s short period (8 seconds) and the wind is cross-on. That’s a lot of water moving around, but it’s going to be a choppy, lumpy mess. For experts only, if you’re desperate. Saturday the 19th morning is a bit better with a light offshore, but the 7 ft swell is still short period and the wind is cross-on, so it’s marginal.
The very end of the outlook, on Wednesday the 23rd of September, has another glimmer. The morning is glassy again with a 4 ft NW swell at 10 seconds, and a combined energy of 360. That’s a decent, clean option, but it’s over a week away, so keep an eye on the forecasts.
So, to sum it up: the first week is a write-off until Sunday the 13th and Monday the 14th mornings, which are the clear standouts. The second week has a couple of bigger, messier swells, and a promising glassy window on the 23rd. For now, I’m marking my calendar for this Sunday.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Fri morning, min 17°C on Thu night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 31°C on Sun morning, min 19°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Tue 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | ||||||||||||||
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 9 | NW 9 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 11 | NNW 10 | NNW 7 | NNW 7 | NNW 6 | NNW 6 | NNW 7 | NNW 15 | NW 13 | NW 12 | NW 12 | NW 11 | NNW 11 | NW 10 |
Wave Graph | ||||||||||||||||||||
241 | 148 | 307 | 419 | 471 | 355 | 759 | 218 | 186 | 121 | 61 | 96 | 82 | 146 | 437 | 520 | 561 | 380 | 207 | 148 | |
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 | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | glassy | on | cross-on | glassy | cross-on | glassy |
High Tide | 2:02AM2.63m | 2:16PM3.00m | 2:45AM2.80m | 2:59PM3.15m | 3:25AM2.92m | 3:38PM3.21m | 4:01AM2.96m | 4:15PM3.17m | 4:36AM2.94m | 4:51PM3.04m | 5:10AM2.86m | 5:26PM2.85m | ||||||||
Low Tide | 7:52PM0.27m | 8:03AM0.35m | 8:37PM0.08m | 8:45AM0.17m | 9:16PM-0.04m | 9:25AM0.07m | 9:53PM-0.07m | 10:02AM0.03m | 10:27PM-0.02m | 10:38AM0.08m | 11:00PM0.11m | 11:13AM0.19m | 11:32PM0.29m | |||||||
— | — | 7:13 | — | — | 7:13 | — | — | 7:13 | — | — | 7:15 | — | — | 7:16 | — | — | 7:16 | — | — | |
7:58 | — | — | 7:55 | — | — | 7:54 | — | — | 7:52 | — | — | 7:51 | — | — | 7:50 | — | — | 7:47 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 20 | 19 | 19 | 18 | 21 | 21 | 18 | 22 | 21 | 20 | 27 | 26 | 27 | 31 | 29 | 29 | 30 | 28 | 25 |
Feels °C | 19 | 21 | 14 | 14 | 13 | 17 | 17 | 14 | 20 | 18 | 20 | 26 | 25 | 24 | 29 | 25 | 26 | 27 | 26 | 24 |
Swell 1 Height (m) Direction Period (s) | NW 9 | NW 9 | N 13 | N 15 | NNW 12 | NNW 8 | WNW 7 | NNW 10 | NNW 7 | NNW 9 | NNW 10 | NNW 6 | WNW 9 | WNW 9 | NW 13 | NW 12 | NW 12 | NW 11 | NNW 11 | NW 10 |
241 | 148 | 4 | 4 | 85 | 355 | 11 | 218 | 186 | 68 | 18 | 96 | 68 | 64 | 437 | 520 | 561 | 380 | 207 | 148 | |
Swell 2 Height (m) Direction Period (s) | — | — | W 13 | N 15 | NW 10 | NNW 11 | W 11 | W 7 | NNW 10 | W 7 | WNW 10 | WNW 10 | NW 18 | NNW 15 | NNW 7 | NNW 6 | N 7 | WNW 9 | WNW 9 | WNW 8 |
— | — | 4 | 4 | 25 | 183 | 2 | 9 | 128 | 4 | 10 | 55 | 12 | 146 | 48 | 21 | 15 | 26 | 52 | 24 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | WNW 7 | — | W 10 | W 7 | W 8 | W 8 | SW 13 | S 12 | NW 11 | W 9 | S 12 | S 6 | S 11 | SSW 4 | NNW 5 |
— | — | — | — | — | 10 | — | 2 | 4 | 1 | 5 | 7 | 3 | 32 | 40 | 3 | 3 | 2 | 2 | 5 | |
Wind waves Height (m) Direction Period (s) | NNW 4 | — | NNW 8 | NNW 8 | NNW 8 | — | NNW 11 | NNW 7 | — | NNW 7 | NNW 6 | — | NNW 7 | NNW 7 | — | — | — | S 5 | — | — |
16 | — | 307 | 419 | 471 | — | 759 | 195 | — | 121 | 61 | — | 82 | 91 | — | — | — | 2 | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 238 | 132 | 263 | 399 | 132 | 34 | 442 | 36 | 37 | 223 | 2 | 1 | 34 | 32 | 0 | 34 | 1 | 0 | 34 | 0 |
Best forecast wave conditions in Ericeira | ||||||||||||||||||||
Best forecast wave conditions in Portugal | ||||||||||||||||||||
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Information about the Coxos Surf forecast
The above surf forecast table for Coxos provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Coxos can be found by selecting the local surf guide option on the grey menu. Our Coxos 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 (Coxos) 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 Coxos 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.
Are you planning a holiday in Ericeira? If you are looking for accommodation near Coxos, camping, hotels and holiday cottages in Ericeira, consider staying in Torres Vedras which is 18 km (11 miles) away. Other places in and around Ericeira where you can find information about places to rent, and car hire include Sintra which is 22 km (14 miles) away, Rio de Mouro, Cacem and Loures.










