Surf Forecasts:
Coxos surf forecast from 20 Aug 2026:
- Best quality surf: Sunday 23 Aug, 7AM (local time) - 3ft (0.9m), 10s period, WNW swell with offshore winds.
- Most powerful swell: Friday 21 Aug, 10AM (local time) - 7ft (2.1m), 11s period, NNW swell with 1,011 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 1AM (local time) - 3.5ft (1.1m), 9s 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 Sunday (Aug 23) at 1AM. The primary swell is predicted to be 1.1m and 9s period with a secondary swell of 0.4m and 8s. The wind is predicted to be cross-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 Friday (Aug 21) at 10AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Monday (Aug 24) at 4AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sun 23rd Aug) | 3.5ft (1.1m) 9s |
| Best Surf | 7AM (Sun 23rd Aug) | 3ft (0.9m) 10s |
| Most Powerful | 10AM (Fri 21st Aug) | 7ft (2.1m) 11s |
Table - best surf conditions forecast for Coxos over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the table for this stretch of coast.
Right off the bat, we’re looking at a pretty grim run for the first week. The water temp is sitting at 68°, which is about 2° cooler than usual for this time of year—nothing wild, just a touch on the fresh side. But the surf? Honestly, it’s a struggle. From Wednesday the 19th all the way through to the end of August, conditions are getting hammered by rough onshore winds and lumpy, choppy seas. Most days are scoring a big fat zero, and the few that even get a mention are tagged as marginal at best. The swell energy is mostly weak to moderate, with values like 101 to 1036 (combined energy of all swells directed here), but the wind is just ruining it. We’re talking fresh cross-onshore winds, lumpy surf, and at times, waves that are steep and poorly shaped. There’s a brief glimmer on Friday the 21st with a 7 ft NNW swell and a period of 11 seconds, but that 22 mph wind from the north makes it a complete mess—only for the truly hardcore, and even then, it’s a kite surfer’s dream more than a paddle surfer’s.
The first real standout that’s worth getting excited about? That’s Saturday the 22nd of August. Morning session at Coxos (reef). We’ve got a 6 ft swell from the NNW, period of 10 seconds, and a light 9 mph NW breeze. It’s onshore, but it’s light, so it’ll be okay. The combined energy (554) is moderate—enough to get a few decent ones. The tide might be a bit questionable, but it’s the cleanest we’ve seen in days. This is your best shot for the first week, and it’s only a 2 out of 10 on the score—so set expectations low.
Then we hit a dry spell. From Sunday the 23rd right through to the end of the month, it’s a lot of poor conditions, cross-onshore winds, and choppy, lumpy surf. The swell energy picks up a bit mid-week, like on Thursday the 27th afternoon with a 6 ft NW swell, period 10 seconds, and a combined energy of 1126 (strong), but once again, the wind is moderate onshore. It’s marginal, but not great.
Into the second week, things don’t improve much. The wind remains a persistent problem. The best bet in the long range looks like Thursday the 3rd of September morning. We’ve got a 6 ft swell from the NNW, period 10 seconds, moderate onshore wind from the north at 12 mph, and the combined energy (588) is moderate. The score is a 1 out of 10, so it’s a marginal day, but if you’re desperate, you might get a few. It’s the only real highlight in the whole second week, and it’s not a strong one.
Overall, this is a tough forecast. The waves are there—some decent NW swells—but the wind is just relentless. The reef at Coxos is your best bet, but it’s going to be a battle. If you’re a kite surfer, you’ll have a field day. For the rest of us, it’s a waiting game.
Rusty.
Short Range ForecastMostly dry. Warm (max 22°C on Wed afternoon, min 18°C on Thu night). Winds increasing (calm on Wed night, fresh winds from the N by Thu afternoon). | Days 5-7 Weather SummaryModerate rain (total 12mm), heaviest on Sun afternoon. Warm (max 22°C on Sun morning, min 19°C on Sat night). Winds increasing (light winds from the SW on Sat night, fresh winds from the S by Sun morning). | |||||||||||||||||||
Wed 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | ||||||||||||||
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 7 | NNW 6 | WNW 9 | WNW 9 | NNW 7 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NNW 9 | NNW 9 | WNW 10 | W 10 | W 9 | WSW 8 | WSW 8 | W 7 | W 7 | W 6 | W 6 |
Wave Graph | ||||||||||||||||||||
68 | 50 | 62 | 59 | 310 | 1011 | 886 | 746 | 516 | 348 | 176 | 377 | 555 | 230 | 620 | 547 | 285 | 153 | 101 | 81 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | glassy | cross-on | on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-on | cross-on | cross | cross |
High Tide | 8:08PM2.18m | 8:37AM2.15m | 9:12PM1.98m | 9:50AM2.03m | 10:42PM1.88m | 11:22AM2.03m | 00:11AM1.94m | 12:36PM2.16m | 1:11AM2.08m | 1:28PM2.34m | 1:54AM2.25m | 2:08PM2.54m | 2:30AM2.42m | |||||||
Low Tide | 2:12AM0.91m | 2:50PM1.00m | 3:15AM1.09m | 4:18PM1.11m | 4:48AM1.16m | 5:56PM1.07m | 6:14AM1.07m | 7:03PM0.92m | 7:12AM0.91m | 7:48PM0.74m | 7:53AM0.72m | 8:24PM0.55m | ||||||||
— | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | |
8:28 | — | — | 8:25 | — | — | 8:24 | — | — | 8:22 | — | — | 8:22 | — | — | 8:21 | — | — | 8:19 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 3 | 2 | — | — | — | — | 1 |
Temp °C | 22 | 21 | 22 | 21 | 19 | 20 | 20 | 18 | 20 | 20 | 19 | 22 | 22 | 21 | 22 | 22 | 20 | 21 | 21 | 21 |
Feels °C | 23 | 22 | 21 | 20 | 14 | 16 | 16 | 15 | 19 | 19 | 19 | 17 | 20 | 19 | 19 | 20 | 19 | 21 | 20 | 20 |
Swell 1 Height (m) Direction Period (s) | NNW 7 | NNW 6 | WNW 9 | WNW 9 | WNW 9 | SSW 15 | SSW 15 | WNW 9 | NNW 10 | NNW 9 | NNW 9 | WNW 10 | W 10 | W 9 | NNW 8 | NNW 8 | W 7 | W 7 | SW 12 | W 6 |
68 | 41 | 62 | 59 | 61 | 21 | 21 | 49 | 516 | 348 | 176 | 377 | 555 | 230 | 11 | 11 | 285 | 153 | 6 | 81 | |
Swell 2 Height (m) Direction Period (s) | NW 10 | WNW 9 | NNW 5 | NW 11 | NW 12 | WNW 9 | W 11 | NNW 12 | W 9 | WNW 9 | WNW 8 | NNW 8 | N 8 | NNW 8 | SW 13 | SW 13 | N 7 | SW 12 | W 10 | SW 12 |
27 | 50 | 17 | 30 | 36 | 25 | 2 | 29 | 38 | 25 | 23 | 90 | 63 | 19 | 7 | 6 | 4 | 6 | 2 | 6 | |
Swell 3 Height (m) Direction Period (s) | WNW 8 | SSW 13 | NNW 12 | SW 13 | NNW 10 | SSW 15 | — | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SW 13 | — | — | SW 12 | N 7 | W 10 | N 10 |
6 | 17 | 14 | 7 | 10 | 21 | — | 18 | 20 | 20 | 20 | 18 | 17 | 7 | — | — | 6 | 1 | 2 | 2 | |
Wind waves Height (m) Direction Period (s) | — | — | — | NNW 5 | NNW 7 | NNW 11 | NNW 10 | NNW 10 | — | — | — | SSE 2 | S 4 | SW 6 | WSW 8 | WSW 8 | — | — | W 6 | — |
— | — | — | 14 | 310 | 1011 | 886 | 746 | — | — | — | 1 | 14 | 112 | 620 | 547 | — | — | 101 | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 205 | 0 | 34 | 223 | 263 | 238 | 399 | 34 | 34 | 41 | 0 | 142 | 223 | 144 | 482 | 271 | 36 | 37 | 482 | 223 |
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.











