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Surf Forecasts:
Coxos surf forecast from 12 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 10AM (local time) - 5ft (1.6m), 8s period, NNW swell with glassy winds.
- Most powerful swell: Sunday 16 Aug, 7AM (local time) - 10ft (3.0m), 9s period, NNW swell with 1,317 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 10AM (local time) - 5ft (1.6m), 8s 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 Tuesday (Aug 18) at 10AM. The primary swell is predicted to be 1.6m and 8s period with a secondary swell of 0.2m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Coxos in the next 16 days are 3.0m 9s and forecast to arrive on Sunday (Aug 16) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Tuesday (Aug 18) at 1PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Tue 18th Aug) | 5ft (1.6m) 8s |
| Best Surf | 10AM (Tue 18th Aug) | 5ft (1.6m) 8s |
| Most Powerful | 7AM (Sun 16th Aug) | 10ft (3.0m) 9s |
Table - best surf conditions forecast for Coxos over the next 16 days.
The Lowdown
Alright, let’s be straight with each other. This 16-day stretch for Coxos (reef) is a grind. Not much to get excited about.
Starting Wednesday the 12th, it’s small and messy. Swell’s around 3ft from the WNW with a 10-second period, but that NNW wind at 15 mph is blowing right onto it. Water temp is about 71°, which is a bit warmer than usual for this time of year – feels a touch mild.
Through Thursday and Friday, the swell builds – up to 5ft by Friday afternoon – but the wind stays cross-onshore and fresh, making everything lumpy and choppy. The energy is moderate, but the quality is poor. Saturday the 15th sees a jump to 8ft from the NNW, with a short 8-second period and strong cross-onshore winds. Energy is strong, but for a reef break, that wind and short-period swell is a mess. It’s big and ugly – more of a kite session than a paddle.
Sunday the 16th morning is the first time things look interesting. Swell is still 8ft from the NNW, period drops to 9 seconds, and the wind eases to a gentle 9 mph cross-onshore. Energy is strong, but conditions are marginal – tide might be a factor. For experienced surfers, there might be some big, lumpy waves if you’re keen. After that, it’s back to poor conditions through the rest of the week.
Then, out of nowhere, Tuesday the 18th morning is the real standout. The wind goes glassy – 3 mph from the NNW – and the swell is a clean 5ft from the NNW with an 8-second period. Energy is moderate, but the glassy conditions make this the best session of the whole outlook. That’s your window. If you can, get out that Tuesday morning for clean conditions and a solid push. Coxos is a reef break and fairly consistent, and the swell direction is spot-on for optimum.
After that, it fades. Swell drops to 4ft through Wednesday and Thursday with onshore winds, and by the following weekend (22nd and 23rd), we’re back to 8ft NNW swells with fresh cross-onshore winds – lumpy and not worth it.
The last few days, from the 24th onward, are flat and weak. Swell drops to 2ft to 2ft with poor wind. Energy barely registers. It’s dead.
So, bottom line: this is a tough run for Coxos. The only real standout is Tuesday morning, the 18th of August, with glassy conditions and a solid 5ft NNW swell. Everything else is compromised by wind or poor quality. If you’re patient, that Tuesday is your call. Otherwise, wait for the next system.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Wed afternoon, min 19°C on Wed night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Tue morning, min 20°C on Sat afternoon). Winds decreasing (strong winds from the NNW on Sat night, calm by Tue morning). | |||||||||||||||||||
Wed 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | ||||||||||||||
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 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | NNW 6 | NNW 7 | NNW 7 | NNW 8 | NNW 8 | NNW 9 | NNW 9 | NNW 8 | NNW 9 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | NNW 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 154 | 150 | 154 | 237 | 175 | 139 | 181 | 423 | 829 | 878 | 1107 | 1050 | 665 | 977 | 784 | 541 | 357 | 346 | 250 | 142 |
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 | cross-on | on | cross-on | glassy | cross-on | cross-on |
High Tide | 3:45AM2.89m | 4:01PM3.26m | 4:27AM2.93m | 4:42PM3.25m | 5:07AM2.90m | 5:22PM3.14m | 5:45AM2.80m | 6:01PM2.95m | 6:23AM2.67m | 6:40PM2.71m | 7:02AM2.50m | 7:21PM2.44m | ||||||||
Low Tide | 9:36PM-0.05m | 9:45AM0.08m | 10:18PM-0.10m | 10:26AM0.04m | 10:58PM-0.07m | 11:05AM0.09m | 11:36PM0.05m | 11:44AM0.20m | 00:12AM0.24m | 12:23PM0.38m | 00:49AM0.46m | 1:04PM0.59m | 1:27AM0.69m | |||||||
 |  | | | | | |  |  |  | | | | | | | | | | | |
 | — | — | 6:48 | — | — | 6:48 | — | — | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:52 | — | — |
 | 8:37 | — | — | 8:36 | — | — | 8:34 | — | — | 8:32 | — | — | 8:31 | — | — | 8:30 | — | — | 8:29 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 19 | 22 | 22 | 20 | 22 | 22 | 21 | 21 | 21 | 20 | 23 | 23 | 20 | 24 | 23 | 21 | 26 | 25 | 22 |
Feels °C | 21 | 18 | 21 | 21 | 18 | 20 | 19 | 17 | 17 | 17 | 15 | 23 | 22 | 19 | 24 | 22 | 21 | 27 | 26 | 22 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | — | S 18 | SW 18 | S 18 | SW 16 | SW 16 | SW 15 | NNW 9 | SW 15 | NNW 8 | NNW 8 | NNW 8 | NNW 8 |
| kJ | 154 | 150 | 154 | 237 | 175 | 130 | 124 | — | 6 | 12 | 6 | 10 | 11 | 9 | 784 | 9 | 357 | 346 | 250 | 142 |
Swell 2 Height (m) Direction Period (s) | NNW 9 | NNW 10 | NW 12 | NNW 9 | — | — | — | — | — | — | — | — | — | — | SW 15 | — | SSW 16 | W 8 | SSW 16 | WNW 8 |
| kJ | 32 | 33 | 37 | 16 | — | — | — | — | — | — | — | — | — | — | 9 | — | 26 | 5 | 24 | 13 |
Swell 3 Height (m) Direction Period (s) | — | — | NNW 10 | — | — | — | — | — | — | — | — | — | — | — | SW 18 | — | — | SSW 16 | S 10 | SSW 15 |
| kJ | — | — | 18 | — | — | — | — | — | — | — | — | — | — | — | 13 | — | — | 25 | 2 | 21 |
Wind waves Height (m) Direction Period (s) | NNW 5 | NNW 5 | NNW 5 | NNW 5 | NNW 6 | NNW 6 | NNW 7 | NNW 7 | NNW 8 | NNW 8 | NNW 9 | NNW 9 | NNW 8 | NNW 9 | — | NNW 9 | — | — | SSE 3 | — |
| kJ | 20 | 28 | 27 | 39 | 77 | 139 | 181 | 423 | 829 | 878 | 1107 | 1050 | 665 | 977 | — | 541 | — | — | 2 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 37 | 34 | 34 | 223 | 37 | 126 | 473 | 226 | 238 | 238 | 132 | 36 | 225 | 36 | 36 | 223 | 36 | 0 | 976 | 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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