
Surf Forecasts:
Coxos surf forecast from 6 Sep 2026:
- Best quality surf: Sunday 13 Sep, 10AM (local time) - 3ft (0.9m), 13s period, NW swell with cross-offshore winds.
- Most powerful swell: Thursday 10 Sep, 1PM (local time) - 7ft (2.1m), 11s period, NNW swell with 936 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 10AM (local time) - 3ft (0.9m), 6s 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 0.9m and 6s period with a secondary swell of 0.4m and 10s. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Coxos in the next 16 days are 2.1m 11s and forecast to arrive on Thursday (Sep 10) at 1PM. 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 2s period and expected on Saturday (Sep 12) at 7AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Sat 12th Sep) | 3ft (0.9m) 6s |
| Best Surf | 10AM (Sun 13th Sep) | 3ft (0.9m) 13s |
| Most Powerful | 1PM (Thu 10th Sep) | 7ft (2.1m) 11s |
Table - best surf conditions forecast for Coxos over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s have a look at what we’ve got on the cards.
The whole 16-day window is a bit of a mixed bag, to be honest. There’s a real run of poor conditions for the first week or so, but if you’re patient, there are a couple of windows that look worth the wait. The standout will be right at the end of the forecast period.
For the first few days, it’s all cross-onshore winds and choppy seas. The energy is moderate to strong, but the wind just ruins it. There’s a real blank run from the start through to about the 11th, where the scores are flat. Nothing worth paddling out for.
The first glimmer of hope comes on Saturday, 12th September. The morning at Coxos looks clean with a light offshore breeze from the ESE. Swell is small, just 3 ft from the NNW with a short period of 6 seconds, and the combined energy is weak (93). It’s surfable but very ordinary – a little knee to waist high dribbler for the keen, but don’t expect much.
Now, Sunday, 13th September morning – this is where things get interesting. The wind turns cross-offshore from the ENE, light airs, and the swell bumps up to 3 ft from the NW but with a lovely long period of 13 seconds. The combined energy jumps to moderate (414). That long period groundswell is going to wrap nicely into this reef set-up, creating some proper shaped waves. It’s going to be clean, and with that period, the paddle out won’t be a battle. Coxos is fairly consistent, exposed to the NNW, and this direction (NW) is in the wheelhouse for the optimum. This is one of the two standouts. It’s a small but quality window.
Then the winds turn onshore again and it’s messy until the 20th of September. There’s some moderate energy in the water, but the cross-on winds just kill the quality. The 17th sees strong breezes and messy conditions, with energy up to 961 – that’s a lot of power, but completely unsurfable for a paddle board. More of a kite day, if you ask me.
The real gem is Sunday, 20th September morning. We’ve got a cross-offshore wind from the south, gentle breeze, clean conditions, and a solid 6 ft swell from the NW with a period of 10 seconds. Combined energy is strong at 625. This is going to be the pick of the whole period – good size, clean lines, and the swell direction is exactly what Coxos likes. It’s an advanced break, and it’s often crowded, so expect company if you head out.
And then, as if to sweeten the deal, Monday, 21st September morning brings glassy conditions – zero wind from the south – with a 5 ft NW swell, 11-second period, and combined energy of 570. This is the other standout. Absolute glass, proper groundswell, and the waves will be lined up and punchy. This is the kind of morning you dream about. Just note, at 5 ft, it’s getting up there for beginners, but for anyone with a bit of experience, it’s prime.
So to wrap it up: the first week is a write-off. The two windows to target are Sunday morning, 13th September for a smaller but clean, long-period session, and then Sunday 20th and Monday 21st September for the real deal. The 21st is the absolute best on offer.
Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Sun morning, min 17°C on Mon night). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Fri morning, min 17°C on Wed night). Winds decreasing (fresh winds from the NNW on Wed afternoon, light winds from the NNE by Fri night). | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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) | NNW 12 | NW 11 | WNW 14 | WNW 12 | WNW 12 | WNW 11 | WNW 10 | NW 9 | NW 9 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 11 | NNW 8 | NNW 8 | NNW 7 | NNW 6 | NNW 6 | NNW 7 | WNW 10 |
Wave Graph | |||||||||||||||||||||
464 | 347 | 660 | 880 | 713 | 444 | 302 | 194 | 148 | 384 | 419 | 471 | 512 | 871 | 302 | 244 | 208 | 90 | 55 | 63 | 130 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | off | cross | cross-on |
High Tide | 11:12AM2.31m | 00:04AM2.23m | 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 | ||||||||
Low Tide | 5:46PM0.74m | 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 | ||||||||
7:09 | — | — | 7:11 | — | — | 7:11 | — | — | 7:13 | — | — | 7:13 | — | — | 7:13 | — | — | 7:15 | — | — | |
— | 8:00 | — | — | 7:59 | — | — | 7:58 | — | — | 7:55 | — | — | 7:54 | — | — | 7:52 | — | — | 7:51 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 22 | 19 | 22 | 21 | 19 | 20 | 20 | 20 | 19 | 19 | 17 | 20 | 20 | 18 | 24 | 23 | 24 | 29 | 26 | 23 |
Feels °C | 21 | 20 | 17 | 20 | 19 | 18 | 17 | 17 | 20 | 14 | 14 | 12 | 16 | 16 | 15 | 22 | 20 | 22 | 26 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | NNW 12 | NW 11 | WNW 14 | WNW 12 | WNW 12 | WNW 11 | WNW 10 | NW 9 | NW 9 | NW 14 | NW 12 | NW 10 | NNW 12 | W 7 | NNW 10 | NNW 8 | N 10 | NNW 6 | NNW 6 | NNW 7 | NNW 7 |
464 | 347 | 660 | 880 | 713 | 444 | 302 | 194 | 148 | 7 | 38 | 108 | 233 | 9 | 173 | 244 | 19 | 90 | 55 | 63 | 68 | |
Swell 2 Height (m) Direction Period (s) | WNW 9 | WNW 9 | NNW 10 | NNW 10 | — | NNW 9 | — | — | — | NW 14 | — | NNW 12 | WNW 8 | — | W 7 | NNW 10 | W 7 | NNW 10 | WNW 10 | WNW 9 | WNW 10 |
94 | 64 | 182 | 81 | — | 15 | — | — | — | 7 | — | 86 | 12 | — | 4 | 125 | 4 | 18 | 32 | 48 | 130 | |
Swell 3 Height (m) Direction Period (s) | SW 12 | WNW 18 | WNW 9 | — | — | — | — | — | — | — | — | — | — | — | W 10 | W 7 | W 8 | W 8 | N 9 | S 3 | NW 15 |
5 | 61 | 47 | — | — | — | — | — | — | — | — | — | — | — | 2 | 4 | 1 | 5 | 6 | 1 | 83 | |
Wind waves Height (m) Direction Period (s) | NNW 4 | NNW 4 | NNW 5 | NNW 5 | NNW 5 | NNW 5 | NNW 5 | NNW 5 | N 4 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 11 | NNW 8 | — | NNW 7 | — | S 3 | WNW 3 | WNW 4 |
6 | 17 | 48 | 42 | 54 | 40 | 34 | 22 | 3 | 384 | 419 | 471 | 512 | 871 | 302 | — | 208 | — | 1 | 2 | 4 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 34 | 225 | 34 | 34 | 426 | 34 | 34 | 399 | 34 | 247 | 547 | 132 | 36 | 513 | 51 | 36 | 209 | 32 | 0 | 41 | 17 |
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.










