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Surf Forecasts:
Coxos surf forecast from 7 Sep 2026:
- Best quality surf: Sunday 13 Sep, 10AM (local time) - 4.5ft (1.3m), 13s period, NW swell with glassy winds.
- Most powerful swell: Monday 7 Sep, 10AM (local time) - 5.5ft (1.7m), 12s period, WNW swell with 880 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 10AM (local time) - 4ft (1.2m), 7s period with NNW 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 Saturday (Sep 12) at 10AM. The primary swell is predicted to be 1.2m and 7s period with a secondary swell of 0.4m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Coxos in the next 16 days are 1.7m 12s and forecast to arrive on Monday (Sep 07) at 10AM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Sat 12th Sep) | 4ft (1.2m) 7s |
| Best Surf | 10AM (Sun 13th Sep) | 4.5ft (1.3m) 13s |
| Most Powerful | 10AM (Mon 7th Sep) | 5.5ft (1.7m) 12s |
Table - best surf conditions forecast for Coxos over the next 16 days.
The Lowdown
G’day, it’s Rusty here, checkin’ in from the coast.
Honestly, mates, the next two weeks are a real tease. We’ve got some swell on the cards, but the wind ain’t playing ball for most of it. The first week is packed with strong cross-onshore breezes that are just chopping everything up, making it a proper battle out there. But don’t lose hope – the second week brings a couple of golden windows that are well worth circling on the calendar.
The standout break is Coxos (Portugal) , a reef setup that needs NNW swell to really get going. The water temp is sitting around average for the time of year, so nothing to write home about there. The first real opportunity you’re gonna see is on Saturday the 12th of September. It’s a small day, with swell around 4ft coming from the NNW, and period a short 7 seconds. The wave energy is pretty weak (171). But the wind is glassy in the morning – complete stillness. It’ll be surfable, but you’ll be working for it, and the lack of punch means it’s not a highlight.
Now, here’s the one you wait for. Sunday the 13th of September is the best on offer. That morning is where it’s at. The swell bumps up a touch to 4ft, still from the NNW, but the period stretches out to a long 13 seconds – that’s proper groundswell energy. The combined energy is a solid 688 (moderate). But the magic is the wind: glassy again, dead calm. For a reef like Coxos, that long-period NNW swell is a beautiful combo. Sets will line up with real shape and power. Get out there early.
Monday the 14th of September morning is your next good call. Glassy once more, with 5ft of NNW swell and a 12-second period. The energy’s up a bit to 635. Still clean, still worth paddling out for. Tuesday the 15th of September morning also has a glassy start, but the swell drops to 4ft and the period shortens to 8 seconds – it’s a bit of a come-down after those earlier sessions.
After that, the winds turn nasty again from Wednesday the 16th onwards, with cross-onshore winds and swells jumping up. On Friday the 18th of September, the swell hits 10ft from the NNW, but it’s howling cross-onshore at 19 mph, making it a messy, lumpy mess. The energy is strong (1662), but that’s strictly for the experienced crew if anyone bothers – honestly, it looks more suited to a kite session than a paddle.
So, to keep it simple: you’ve got a long wait through most of the first week with rubbish wind. The clear winners are Sunday the 13th and Monday the 14th of September mornings at Coxos. Clean, glassy, with proper groundswell. That’s your window. The rest? A whole lot of blown-out potential.
Talk soon,
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Mon morning, min 17°C on Sun night). Winds increasing (light winds from the NNW on Tue night, fresh winds from the N by Wed afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Sat morning, min 17°C on Wed night). Winds decreasing (fresh winds from the NNW on Thu afternoon, calm by Sat morning). | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
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) | WNW 12 | WNW 12 | WNW 11 | WNW 10 | NW 9 | NW 9 | NW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 11 | NNW 10 | NNW 7 | NNW 6 | NNW 6 | NNW 7 | NNW 7 | NNW 7 | NW 13 | NW 13 | NW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 880 | 713 | 444 | 302 | 241 | 168 | 398 | 471 | 483 | 392 | 328 | 279 | 141 | 113 | 79 | 139 | 143 | 125 | 553 | 563 | 710 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | cross-on | cross-on | glassy | cross-on | glassy |
High Tide | 12:30PM2.52m | 1:11AM2.43m | 1:28PM2.77m | 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 | ||||||||
Low Tide | 6:11AM0.79m | 6:58PM0.51m | 7:13AM0.57m | 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 | |||||||
 | |  |  | |  | | | | | | | | | | | | | | | | |
 | 7:11 | — | — | 7:11 | — | — | 7:13 | — | — | 7:13 | — | — | 7:13 | — | — | 7:15 | — | — | 7:16 | — | — |
 | — | 7:59 | — | — | 7:58 | — | — | 7:55 | — | — | 7:54 | — | — | 7:52 | — | — | 7:51 | — | — | 7:50 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 19 | 20 | 20 | 20 | 19 | 19 | 18 | 22 | 21 | 17 | 23 | 22 | 20 | 25 | 23 | 23 | 27 | 24 | 22 |
Feels °C | 20 | 20 | 17 | 18 | 18 | 21 | 14 | 14 | 14 | 18 | 16 | 13 | 20 | 19 | 20 | 24 | 23 | 22 | 26 | 23 | 22 |
Swell 1 Height (m) Direction Period (s) | WNW 12 | WNW 12 | WNW 11 | WNW 10 | NW 9 | NW 9 | N 14 | NW 12 | NNW 12 | NNW 8 | NNW 11 | NNW 10 | NNW 7 | N 9 | NNW 9 | NNW 7 | NNW 7 | NNW 7 | NW 13 | NW 13 | NW 13 |
| kJ | 880 | 713 | 444 | 302 | 241 | 168 | 4 | 6 | 83 | 392 | 328 | 279 | 141 | 64 | 17 | 139 | 143 | 125 | 553 | 563 | 710 |
Swell 2 Height (m) Direction Period (s) | NNW 10 | — | NNW 9 | — | — | — | — | N 15 | NW 10 | NNW 11 | W 7 | W 7 | NNW 10 | W 7 | W 8 | WNW 10 | W 9 | NW 15 | NNW 8 | NNW 8 | NNW 7 |
| kJ | 81 | — | 15 | — | — | — | — | 4 | 25 | 200 | 9 | 4 | 102 | 4 | 5 | 32 | 43 | 113 | 135 | 128 | 62 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | WNW 8 | — | W 10 | W 7 | W 8 | WNW 10 | SW 13 | WNW 12 | W 9 | SW 12 | S 12 | S 11 |
| kJ | — | — | — | — | — | — | — | — | — | 11 | — | 2 | 4 | 6 | 11 | 7 | 14 | 40 | 6 | 3 | 2 |
Wind waves Height (m) Direction Period (s) | NNW 5 | NNW 9 | NNW 5 | NNW 5 | NNW 4 | — | NW 8 | NNW 8 | NNW 8 | — | NNW 8 | NNW 7 | — | NNW 6 | NNW 6 | — | — | — | — | — | — |
| kJ | 38 | 173 | 28 | 25 | 22 | — | 398 | 471 | 483 | — | 226 | 144 | — | 113 | 79 | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 34 | 389 | 34 | 34 | 37 | 132 | 286 | 399 | 126 | 36 | 225 | 36 | 37 | 223 | 37 | 0 | 138 | 1 | 0 | 223 | 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.
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