Surf Forecasts:
Cogumelo surf forecast from 17 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 4AM (local time) - 3ft (0.9m), 8s period, NW swell with glassy winds.
- Most powerful swell: Friday 21 Aug, 4PM (local time) - 6ft (1.8m), 8s period, NW swell with 482 kJ wave energy.
- Next surfable swell (1★+): Tuesday 18 Aug, 4AM (local time) - 3ft (0.9m), 8s period with NW swell.
Best Forecast Surf Conditions for Cogumelo this week:
The surf forecast for Cogumelo over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 18) at 4AM. The primary swell is predicted to be 0.9m 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 Cogumelo in the next 16 days are 1.8m 8s and forecast to arrive on Friday (Aug 21) at 4PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.9m 7s period and expected on Friday (Aug 21) at 10PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Tue 18th Aug) | 3ft (0.9m) 8s |
| Best Surf | 4AM (Tue 18th Aug) | 3ft (0.9m) 8s |
| Most Powerful | 4PM (Fri 21st Aug) | 6ft (1.8m) 8s |
Table - best surf conditions forecast for Cogumelo over the next 16 days.
The Lowdown
Alright, this is Rusty. Let’s have a look at what’s on the table for the next couple of weeks.
Right off the bat, I gotta be straight with you – it’s a slow start. The first real chance of anything decent doesn’t show up until Monday morning the 17th, and even then, it’s not exactly lighting the world on fire. We’ve got a bit of a gap before that, so don’t rush. The only spot on the radar here is a place called Cogumelo.
Alright, Monday the 17th morning, we see some small, weak swell rolling in at 4ft from the NW with a period of 8 seconds. The combined energy is weak at 161, so don’t expect much push. The wind is a light cross-off from the SE at 6 mph, and the water temp is sitting at 67°, which feels a bit colder than normal for this time of year – about 3° cooler. It’s surfable but very ordinary. That same afternoon the wind swings onshore and it all goes to crap.
Tuesday the 18th is a write-off. Tiny waves, barely a ripple. The same goes for Wednesday and Thursday – there’s some glassy conditions on Thursday morning, but with a swell of only 2ft, it’s more of a paddle than a surf.
Now, Friday the 21st is where things start to get a bit more interesting, but only if you’re desperate. The swell bumps up to 5ft from the NW, with moderate energy (362), but that cross-onshore wind from the NNW at 12 mph is going to chop it right up. It’ll be messy and lumpy, not the best for a real clean ride. Saturday the 22nd is similar, just a bit smaller with the same cross-onshore mess.
We hit a real rough patch from Sunday the 23rd all the way through to Friday the 28th. The swell is inconsistent, the wind is almost always onshore or cross-onshore, and the quality is poor. There’s nothing worth paddling out for. A long, frustrating gap.
But hold on. If you’ve got patience, the real standout shows up on Saturday the 29th. This is the one. Saturday morning at Cogumelo looks like a proper session. We’ve got a 6ft NW groundswell with a period of 10 seconds – that’s got some serious grunt. The combined energy is strong at 724, so you’ll feel it. The kicker is that glassy, offshore wind from the WSW at just 3 mph. It’s going to be clean, lined up, and offering some proper waves. This is the best on offer by a country mile. The afternoon stays fat at 6ft but the wind swings onshore, so be there early.
Sunday the 30th drops off again, and Monday the 31st is marginal with a choppy cross-shore wind. There’s one more interesting blip on Tuesday the 1st of September, with another 6ft NW swell, but it’s going to be hammered by a fresh onshore wind at 19 mph, making it lumpy and tough. One for the experts only.
So, bottom line: if you can wait, Saturday the 29th morning is your window. That’s the real gem. The rest is mostly filler or blown out. Keep an eye on it, but don’t hold your breath for the week in between.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Mon morning, min 19°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Thu morning, min 16°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | |||||||||||||||
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) | NW 8 | NW 8 | WNW 8 | WNW 8 | SSW 15 | SSW 15 | SSW 14 | WNW 11 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | NW 8 | NW 8 | NW 8 | NW 10 | NW 9 | WNW 8 | NW 8 | W 8 | NW 8 |
Wave Graph | |||||||||||||||||||||
147 | 167 | 10 | 10 | 22 | 21 | 20 | 12 | 38 | 47 | 44 | 43 | 408 | 482 | 314 | 269 | 173 | 24 | 151 | 239 | 211 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | on | cross | glassy | cross-on | glassy | cross | cross-on | glassy | cross-on | on | cross | cross-on | cross-on | cross | cross-on | on | cross-on | cross-on | cross-on | cross-on |
High Tide | 6:26PM2.64m | 6:47AM2.43m | 7:07PM2.37m | 7:30AM2.25m | 7:54PM2.12m | 8:22AM2.08m | 8:58PM1.92m | 9:37AM1.97m | 10:30PM1.83m | 11:09AM1.97m | 11:58PM1.89m | 12:23PM2.10m | 00:58AM2.03m | ||||||||
Low Tide | 12:08PM0.37m | 00:33AM0.46m | 12:48PM0.57m | 1:11AM0.68m | 1:34PM0.79m | 1:56AM0.90m | 2:34PM0.98m | 2:59AM1.07m | 4:02PM1.08m | 4:33AM1.13m | 5:42PM1.04m | 6:01AM1.05m | 6:49PM0.89m | ||||||||
6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — | |
— | 8:25 | — | — | 8:23 | — | — | 8:22 | — | — | 8:22 | — | — | 8:20 | — | — | 8:19 | — | — | 8:17 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 29 | 23 | 21 | 27 | 25 | 20 | 27 | 25 | 20 | 24 | 24 | 20 | 22 | 21 | 18 | 21 | 22 | 20 | 22 | 21 | 19 |
Feels °C | 30 | 23 | 22 | 26 | 23 | 22 | 26 | 24 | 23 | 24 | 24 | 21 | 19 | 17 | 15 | 20 | 21 | 21 | 19 | 18 | 17 |
Swell 1 Height (m) Direction Period (s) | NW 8 | NW 8 | NNW 8 | NNW 8 | NNW 8 | NW 8 | NNW 8 | NNW 7 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | NW 8 | SSW 14 | WNW 9 | NW 10 | NW 9 | NW 9 | NW 8 | W 8 | NW 8 |
147 | 167 | 112 | 84 | 86 | 65 | 41 | 21 | 38 | 47 | 44 | 43 | 408 | 19 | 34 | 269 | 173 | 83 | 151 | 239 | 211 | |
Swell 2 Height (m) Direction Period (s) | SW 15 | SW 16 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | NNW 7 | NW 6 | NW 6 | NW 11 | NW 12 | SW 14 | SSW 13 | WNW 9 | WNW 9 | WNW 8 | SW 13 | NNW 8 | W 7 |
8 | 10 | 7 | 6 | 6 | 7 | 6 | 6 | 20 | 9 | 8 | 18 | 35 | 7 | 18 | 32 | 25 | 24 | 7 | 46 | 71 | |
Swell 3 Height (m) Direction Period (s) | S 18 | SW 16 | SW 16 | SW 16 | SSW 15 | SSW 15 | SSW 14 | WNW 11 | SW 4 | SW 4 | SSW 4 | SSW 4 | SSW 14 | — | — | SSW 14 | SSW 14 | SW 14 | W 10 | SW 13 | SW 13 |
6 | 10 | 10 | 10 | 22 | 21 | 20 | 12 | 5 | 4 | 2 | 1 | 21 | — | — | 20 | 20 | 8 | 2 | 7 | 7 | |
Wind waves Height (m) Direction Period (s) | — | SW 3 | SSW 3 | — | — | — | — | SW 3 | — | — | — | NW 4 | — | NW 8 | NW 8 | — | — | — | — | — | — |
— | 2 | 1 | — | — | — | — | 2 | — | — | — | 14 | — | 482 | 314 | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 72 | 5 | 5 | 72 | 11 | 11 | 67 | 1 | 11 | 11 | 454 | 91 | 234 | 9 | 29 | 78 | 443 | 77 | 384 | 9 |
Best forecast wave conditions in Portugal - Alentejo | |||||||||||||||||||||
Best forecast wave conditions in Portugal | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
Information about the Cogumelo Surf forecast
The above surf forecast table for Cogumelo provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Cogumelo can be found by selecting the local surf guide option on the grey menu. Our Cogumelo 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 (Cogumelo) 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 Cogumelo 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.
Cogumelo is 29 km (18 miles) from Sines. If you plan a holiday in Portugal - Alentejo, look for hotels and other accommodation in Sines. Sines has rooms for a wide range of budgets as well as car hire and transport links.











