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Surf Forecasts:
Coxos surf forecast from 13 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 10AM (local time) - 5ft (1.5m), 8s period, NNW swell with glassy winds.
- Most powerful swell: Sunday 16 Aug, 4AM (local time) - 8ft (2.5m), 9s period, NNW swell with 1,050 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 10AM (local time) - 5ft (1.5m), 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 1.5m and 8s period with a secondary swell of 0.3m 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 2.5m 9s and forecast to arrive on Sunday (Aug 16) 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 0.2m 16s period and expected on Tuesday (Aug 18) at 4PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Tue 18th Aug) | 5ft (1.5m) 8s |
| Best Surf | 10AM (Tue 18th Aug) | 5ft (1.5m) 8s |
| Most Powerful | 4AM (Sun 16th Aug) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Coxos over the next 16 days.
The Lowdown
Alright mate, let’s break it down.
This 16-day stretch at Coxos is a real tease. There’s swell coming and going, but the wind’s gonna mess it up most of the time. Water temp is around 71°F, pretty normal for this time of year.
First real opportunity is Tuesday morning, August 18th. You’ve got a light southerly breeze blowing cross-offshore, with swell around 5 ft from the NNW, period around 8 seconds. The combined swell energy is moderate at 352. That offshore wind’s gonna give you clean lines. That’s the best session of the whole outlook—Tuesday morning at Coxos is the one.
After that, it goes downhill quick. The afternoon of the 18th the wind shifts and picks up. Wednesday the 19th morning looks glassy with a light SSW breeze, but the swell’s dropped to only 3 ft (energy 131). Surfable, but nothing to write home about.
Thursday the 20th and Friday the 21st are blown to bits with strong cross-onshore winds. Saturday the 22nd brings a bigger pulse—8 ft from the NNW (energy hitting 728)—but with a 25 mph north wind smashing it cross-on, it’s gonna be a mess. At that size and wind, a reef break like Coxos turns into a washing machine. More for kite surfers than paddle surfers.
Sunday the 23rd through Monday the 24th are still cross-on and messy, swell dropping.
Then Tuesday the 25th morning pops up again: light rain, glassy conditions with a 3 mph SE breeze, and a clean 3 ft NNW swell, period 9 seconds, energy 369. Small, but clean—sneaky good session if you’re keen. After that, the wind kicks up again and it’s bumpy through to the end.
So here’s the call: Tuesday morning the 18th is your standout. Tuesday the 25th morning is a smaller, quieter option. Everything else is either too windy, too choppy, or the swell doesn’t line up with the conditions.
Coxos is an advanced reef break, fairly consistent, and it does get crowded often. The swell direction we want is from the NNW, and that’s what we’re getting on the good days, so that’s a plus. The longer 9-second period on the 25th gives a bit more push, but it’s still not a long-period groundswell.
Get after those windows when they open. Rusty.
Short Range ForecastMostly dry. Warm (max 23°C on Thu afternoon, min 19°C on Thu night). Winds decreasing (fresh winds from the NNW on Fri night, light winds from the N by Sat night). | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Tue morning, min 20°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||
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 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | NNW 7 | NNW 8 | NNW 8 | NNW 9 | NNW 9 | NNW 8 | NNW 8 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 154 | 237 | 175 | 130 | 127 | 353 | 941 | 837 | 943 | 803 | 488 | 465 | 563 | 412 | 250 | 299 | 206 | 137 | 142 | 151 | 207 |
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 | cross-on | cross-on | on | on | cross-on | cross-on | on | cross-on | glassy | cross-on | cross-on | glassy | on | cross-on |
High Tide | 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 | 7:44AM2.32m | 8:08PM2.18m | ||||||||
Low Tide | 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 | 1:50PM0.80m | 2:12AM0.91m | ||||||||
 |  |  | | |  |  | |  | | | | | | | | | | | | | |
 | 6:48 | — | — | 6:48 | — | — | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:52 | — | — | 6:54 | — | — |
 | — | 8:36 | — | — | 8:34 | — | — | 8:32 | — | — | 8:31 | — | — | 8:30 | — | — | 8:29 | — | — | 8:28 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 23 | 20 | 22 | 22 | 21 | 21 | 22 | 20 | 24 | 22 | 21 | 24 | 23 | 22 | 27 | 25 | 23 | 25 | 24 | 21 |
Feels °C | 21 | 22 | 18 | 21 | 19 | 18 | 18 | 19 | 16 | 25 | 22 | 21 | 25 | 23 | 22 | 27 | 25 | 24 | 25 | 24 | 20 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | — | S 18 | SW 18 | S 18 | NNW 9 | NNW 8 | NNW 8 | NNW 9 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 |
| kJ | 154 | 237 | 175 | 130 | 127 | — | 6 | 12 | 6 | 803 | 488 | 465 | 563 | 412 | 250 | 299 | 206 | 137 | 142 | 151 | 207 |
Swell 2 Height (m) Direction Period (s) | NNW 10 | — | — | — | — | — | — | — | — | SW 16 | SW 16 | SW 15 | SW 15 | W 9 | W 8 | WNW 8 | SSW 16 | WNW 8 | WNW 8 | WNW 8 | WNW 10 |
| kJ | 18 | — | — | — | — | — | — | — | — | 10 | 11 | 9 | 9 | 2 | 5 | 11 | 24 | 7 | 12 | 6 | 38 |
Swell 3 Height (m) Direction Period (s) | NW 12 | — | — | — | — | — | — | — | — | — | — | — | SW 18 | SW 15 | SSW 16 | SSW 16 | WNW 8 | SSW 15 | SW 14 | SSW 14 | SSW 13 |
| kJ | 37 | — | — | — | — | — | — | — | — | — | — | — | 13 | 9 | 26 | 25 | 6 | 21 | 33 | 20 | 17 |
Wind waves Height (m) Direction Period (s) | NNW 5 | NNW 5 | NNW 5 | NNW 6 | NNW 6 | NNW 7 | NNW 8 | NNW 8 | NNW 9 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 17 | 30 | 69 | 106 | 117 | 353 | 941 | 837 | 943 | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 34 | 404 | 37 | 126 | 473 | 222 | 190 | 563 | 138 | 32 | 226 | 36 | 36 | 226 | 36 | 0 | 847 | 36 | 0 | 541 | 34 |
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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