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Surf Forecasts:
Coxos surf forecast from 23 Aug 2026:
- Most powerful swell: Friday 28 Aug, 10AM (local time) - 10ft (3.0m), 11s period, NW swell with 2,116 kJ wave energy.
Best Forecast Surf Conditions for Coxos this week:
The most powerful waves expected at Coxos in the next 16 days are 3.0m 11s and forecast to arrive on Friday (Aug 28) at 10AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 5s period and expected on Sunday (Aug 23) at 7PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10AM (Fri 28th Aug) | 10ft (3.0m) 11s |
Table - best surf conditions forecast for Coxos over the next 16 days.
The Lowdown
Alright, listen up. This stretch is looking pretty bleak. The only break we’ve got is Coxos, a reef that’s fairly consistent, but the next 16 days are mostly a bust. There’s a big gap from now until the morning of August 28th where the conditions are just plain bad. The winds are mostly cross and cross-on, pretty stiff, and the swell is all chopped up. The combined wave energy is weak to moderate, with readings like 767, 663, and 783, but it’s all wind-affected and messy. The water temp is 66°, which is a bit colder than normal for this time of year, so you’ll need a good wetsuit if you’re even thinking about paddling out.
But there is one window that’s a real standout, and it’s a heavy one. On the morning of Friday, August 28th, it all comes together. The swell jumps to a solid 10ft from the NW, with a period of 11 seconds, and the wind swings clean offshore from the NNW at just 6 mph. The combined energy is a massive 2116, which is strong to very strong. This is a serious, powerful groundswell hitting a reef. This is only for experts – 10ft on a reef with that kind of energy is no joke, and the crowd profile at Coxos says “often,” so expect some company. The swell direction (NW) is a good match for the optimum (NNW), so the waves should be well-shaped. This is easily the best you’re going to get, but it’s a big-wave day, plain and simple.
The afternoon of the 28th is still big at 8ft from the NW with an 11-second period, but the wind picks up to 15 mph onshore, so it’ll get ragged. Still a chance for the brave, but the morning is the real deal.
After that, from the 29th of August through to the 7th of September, it’s back to the same old story: cross-on winds, chop, and poor surf. The swell drops off, with combined energy falling back to the hundreds and then down to double digits. There’s a little bump on the afternoon of September 7th with 6ft and a 10-second period, giving energy of 679, but the wind is cross-on again, so it’s only marginal. The only real shot in this whole 16-day run is that Friday morning, the 28th. If you’re not an expert, don’t even think about it.
- Rusty
Short Range ForecastModerate rain (total 13mm), heaviest on Mon morning. Warm (max 22°C on Sun morning, min 20°C on Sun night). Winds decreasing (fresh winds from the SSE on Sun morning, light winds from the WNW by Mon night). | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Wed morning. Warm (max 21°C on Wed morning, min 17°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
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 11 | W 10 | WSW 9 | WSW 8 | WSW 8 | W 7 | W 7 | WNW 7 | WNW 6 | W 6 | WNW 6 | WNW 8 | WNW 9 | WNW 8 | NW 9 | NW 11 | NW 11 | NW 11 | NW 10 | NNW 10 | NNW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 718 | 630 | 773 | 778 | 600 | 311 | 187 | 139 | 75 | 57 | 112 | 186 | 454 | 455 | 711 | 2116 | 1625 | 1232 | 739 | 670 | 431 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross | cross | cross-on | cross | cross | cross-on | cross | cross-on | cross-on | cross-on | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 12:36PM2.16m | 1:11AM2.08m | 1:28PM2.34m | 1:54AM2.25m | 2:08PM2.54m | 2:30AM2.42m | 2:43PM2.72m | 3:03AM2.57m | 3:15PM2.87m | 3:34AM2.69m | 3:46PM2.98m | 4:05AM2.78m | 4:17PM3.03m | ||||||||
Low Tide | 7:03PM0.92m | 7:12AM0.91m | 7:48PM0.74m | 7:53AM0.72m | 8:24PM0.55m | 8:28AM0.54m | 8:57PM0.38m | 9:01AM0.39m | 9:28PM0.24m | 9:32AM0.26m | 9:59PM0.14m | 10:04AM0.19m | 10:29PM0.09m | ||||||||
 |  |  | |  |  |  |  |  | | |  |  | | | | | | | | | |
 | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | 7:00 | — | — | 7:01 | — | — | 7:01 | — | — | 7:03 | — | — |
 | — | 8:22 | — | — | 8:21 | — | — | 8:19 | — | — | 8:17 | — | — | 8:15 | — | — | 8:15 | — | — | 8:13 | — |
mm | 3 | 1 | 5 | 4 | — | — | — | — | — | 3 | — | 1 | 2 | 1 | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 21 | 22 | 22 | 21 | 21 | 22 | 20 | 21 | 21 | 20 | 21 | 20 | 20 | 20 | 20 | 18 | 20 | 20 | 19 |
Feels °C | 18 | 18 | 17 | 19 | 19 | 21 | 23 | 22 | 21 | 20 | 19 | 19 | 17 | 16 | 17 | 19 | 17 | 17 | 18 | 17 | 18 |
Swell 1 Height (m) Direction Period (s) | WNW 11 | W 10 | N 8 | N 8 | NNW 8 | W 7 | W 7 | WNW 7 | WNW 6 | NW 10 | SW 11 | WNW 8 | WNW 9 | SW 11 | NW 9 | NW 11 | NW 11 | NW 11 | NW 10 | — | — |
| kJ | 718 | 630 | 10 | 5 | 13 | 311 | 187 | 139 | 75 | 4 | 5 | 186 | 454 | 5 | 711 | 2116 | 1625 | 1232 | 739 | — | — |
Swell 2 Height (m) Direction Period (s) | N 8 | N 8 | SSW 13 | SW 13 | SW 13 | N 8 | N 7 | SW 12 | NW 11 | W 9 | W 9 | SW 11 | SW 11 | — | SW 11 | — | — | — | — | — | — |
| kJ | 49 | 33 | 17 | 7 | 6 | 5 | 1 | 6 | 4 | 2 | 2 | 5 | 5 | — | 4 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | SSW 13 | SSW 13 | — | — | — | SW 12 | SW 12 | N 6 | W 10 | SW 12 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 18 | 17 | — | — | — | 6 | 6 | 1 | 2 | 5 | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSW 6 | S 6 | WSW 9 | WSW 8 | WSW 8 | — | — | — | — | W 6 | WNW 6 | — | — | WNW 8 | — | — | — | — | — | NNW 10 | NNW 9 |
| kJ | 104 | 144 | 773 | 778 | 600 | — | — | — | — | 57 | 112 | — | — | 455 | — | — | — | — | — | 670 | 431 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 144 | 263 | 144 | 399 | 272 | 37 | 20 | 41 | 34 | 144 | 482 | 37 | 222 | 225 | 36 | 34 | 238 | 34 | 34 | 403 | 36 |
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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