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Surf Forecasts:
Coxos surf forecast from 11 Sep 2026:
- Best quality surf: Friday 18 Sep, 10AM (local time) - 6.5ft (2.0m), 9s period, NNW swell with cross-offshore winds.
- Most powerful swell: Thursday 17 Sep, 4AM (local time) - 10ft (3.0m), 10s period, NNW swell with 1,724 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 7AM (local time) - 4.5ft (1.3m), 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 7AM. The primary swell is predicted to be 1.3m and 7s period with a secondary swell of 0.3m and 9s. 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 10s and forecast to arrive on Thursday (Sep 17) at 4AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.1m 13s period and expected on Wednesday (Sep 16) at 7AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sat 12th Sep) | 4.5ft (1.3m) 7s |
| Best Surf | 10AM (Fri 18th Sep) | 6.5ft (2.0m) 9s |
| Most Powerful | 4AM (Thu 17th Sep) | 10ft (3.0m) 10s |
Table - best surf conditions forecast for Coxos over the next 16 days.
The Lowdown
Alright, Rusty here with a look at Coxos. The wind is going to be the boss for the next two weeks, and for the first stretch, it’s not the boss we want.
The first good chance to paddle out comes on the morning of Sunday, the 13th. The water is a chilly 62°, which is over 5° colder than normal for this time of year—that’s a bite, so you’ll want a good wetsuit. The swell will be a small 3ft from the NW, but the period is a strong 13 seconds. That’s a proper long-period groundswell, which means better shape and more push. Out here at Coxos on the reef, that’s perfect. The morning is dead glassy with zero wind, so it’ll be clean as a whistle. The combined energy is moderate, reading 378.
The morning of Monday the 14th is also worth a look. A light cross-offshore breeze from the SSW will keep the faces clean. The swell drops a little to 3ft from the NW, with a good 11-second period and moderate energy (298).
The middle of the week goes off the rails. Wednesday the 16th sees a massive spike. The morning brings a 10ft swell from the NNW, but the wind is a strong cross-onshore at 25 mph. The wave energy is very strong at 1481, but it’s just a messy, blown-out mess.
The real standout of the whole forecast looks like the morning of Friday the 18th. You’ll have a clean cross-offshore wind from the East at a gentle 9 mph. The swell is a solid 7ft from the NNW, but it’s a short-period 9-second swell. At that size, it’s expert-only territory, but with that offshore wind grooming it, the sets will be steep and hollow for the crew who can handle it. The combined energy is a strong 654.
After that, the morning of Saturday the 19th cleans up again with a smaller 4ft swell and a longer period, and the 20th also has a clean offshore window in the morning.
Looking into the second week, the 25th pumps out a massive groundswell—8ft with a very long 15-second period—but the onshore wind screams at 22 mph. The energy is huge at 2387, but it’s not for surfboards; it’s for kite gear if anything.
So, don’t bother until the 13th. Your two best windows are the small, glassy Sunday for a relaxed cruise, and the big, offshore Friday for a proper adrenaline session for the experts.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Sun morning, min 19°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Mon morning, min 17°C on Tue night). Winds increasing (light winds from the SSW on Mon morning, strong winds from the N by Tue night). | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||
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 10 | NNW 6 | NNW 6 | NNW 7 | NNW 7 | NNW 8 | NW 13 | NW 12 | NW 12 | NW 11 | NW 11 | NW 10 | NNW 10 | NW 12 | NNW 7 | NNW 9 | NNW 9 | NNW 9 | NNW 11 | NNW 10 | NNW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 128 | 68 | 87 | 157 | 115 | 128 | 290 | 465 | 427 | 242 | 172 | 104 | 63 | 65 | 320 | 1320 | 1211 | 994 | 1384 | 886 | 669 |
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 | cross-on | glassy | cross-on | cross-on | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on |
High Tide | 3:38PM3.21m | 4:01AM2.96m | 4:15PM3.17m | 4:36AM2.94m | 4:51PM3.04m | 5:10AM2.86m | 5:26PM2.85m | 5:44AM2.73m | 6:02PM2.62m | 6:18AM2.55m | 6:39PM2.37m | 6:56AM2.36m | 7:22PM2.13m | ||||||||
Low Tide | 9:53PM-0.07m | 10:02AM0.03m | 10:27PM-0.02m | 10:38AM0.08m | 11:00PM0.11m | 11:13AM0.19m | 11:32PM0.29m | 11:48AM0.36m | 00:04AM0.50m | 12:25PM0.57m | 00:38AM0.73m | 1:07PM0.80m | 1:19AM0.95m | ||||||||
 | |  | | | | | | | | | | | |  | | | | | | | |
 | 7:13 | — | — | 7:15 | — | — | 7:16 | — | — | 7:16 | — | — | 7:18 | — | — | 7:18 | — | — | 7:20 | — | — |
 | — | 7:52 | — | — | 7:51 | — | — | 7:50 | — | — | 7:47 | — | — | 7:46 | — | — | 7:45 | — | — | 7:43 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 20 | 26 | 25 | 25 | 28 | 27 | 26 | 27 | 24 | 21 | 22 | 21 | 18 | 19 | 19 | 20 | 24 | 23 | 21 |
Feels °C | 19 | 19 | 21 | 25 | 24 | 23 | 27 | 25 | 24 | 25 | 22 | 21 | 20 | 19 | 14 | 13 | 13 | 17 | 19 | 18 | 18 |
Swell 1 Height (m) Direction Period (s) | NNW 10 | NNW 9 | NNW 6 | NNW 7 | NNW 7 | NNW 8 | NW 13 | NW 12 | NW 12 | NW 11 | NW 11 | NW 10 | NNW 10 | NW 12 | NW 11 | WNW 11 | SW 13 | NW 12 | NNW 11 | S 12 | NNW 10 |
| kJ | 128 | 68 | 87 | 157 | 115 | 128 | 290 | 465 | 427 | 242 | 172 | 104 | 63 | 65 | 117 | 161 | 6 | 593 | 1384 | 3 | 669 |
Swell 2 Height (m) Direction Period (s) | W 7 | W 7 | NNW 9 | WNW 10 | WNW 9 | WNW 9 | NNW 7 | NNW 7 | N 7 | WNW 9 | WNW 9 | WNW 8 | WNW 8 | WNW 8 | — | S 13 | — | SW 12 | S 12 | S 16 | SW 16 |
| kJ | 4 | 4 | 17 | 55 | 68 | 64 | 48 | 40 | 27 | 46 | 47 | 40 | 22 | 22 | — | 3 | — | 6 | 3 | 5 | 10 |
Swell 3 Height (m) Direction Period (s) | W 9 | WNW 8 | WNW 9 | SW 13 | NW 12 | NW 15 | W 9 | S 11 | S 11 | NNW 6 | S 11 | S 10 | NW 12 | S 10 | — | — | — | — | S 18 | — | S 11 |
| kJ | 2 | 7 | 16 | 7 | 6 | 80 | 40 | 3 | 2 | 10 | 2 | 2 | 23 | 2 | — | — | — | — | 6 | — | 2 |
Wind waves Height (m) Direction Period (s) | NNW 6 | NNW 6 | — | — | — | — | — | — | — | — | NW 5 | NNW 5 | NNW 4 | NNW 4 | NNW 7 | NNW 9 | NNW 9 | NNW 9 | — | NNW 10 | — |
| kJ | 74 | 55 | — | — | — | — | — | — | — | — | 7 | 10 | 8 | 44 | 320 | 1320 | 1211 | 994 | — | 886 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 37 | 223 | 36 | 1 | 34 | 1 | 0 | 41 | 1 | 0 | 37 | 34 | 34 | 985 | 238 | 583 | 583 | 34 | 36 | 36 | 32 |
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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