
Surf Forecasts:
Cogumelo surf forecast from 3 Sep 2026:
- Best quality surf: Thursday 3 Sep, 10PM (local time) - 2ft (0.6m), 8s period, WNW swell with glassy winds.
- Most powerful swell: Tuesday 8 Sep, 4AM (local time) - 6.5ft (2.0m), 11s period, NW swell with 880 kJ wave energy.
- Next surfable swell (1★+): Thursday 3 Sep, 10PM (local time) - 2ft (0.6m), 8s period with WNW 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 Thursday (Sep 03) at 10PM. The primary swell is predicted to be 0.6m and 8s period with a secondary swell of 0.5m and 6s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Cogumelo in the next 16 days are 2.0m 11s and forecast to arrive on Tuesday (Sep 08) at 4AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 13s period and expected on Sunday (Sep 06) at 7AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 3rd Sep) | 2ft (0.6m) 8s |
| Best Surf | 10PM (Thu 3rd Sep) | 2ft (0.6m) 8s |
| Most Powerful | 4AM (Tue 8th Sep) | 6.5ft (2.0m) 11s |
Table - best surf conditions forecast for Cogumelo over the next 16 days.
The Lowdown
Right, let’s have a look at what’s cookin’ over at Cogumelo. It’s been a bit of a slow start, but there’s a real treat waiting down the line if you’ve got the patience.
We’re looking at a long run of flat-to-poor conditions here to kick things off. From Thursday the 3rd right through to Sunday the 13th of September, it’s a pretty grim stretch. The swell is tiny—mostly around 2 ft to 4 ft—and it’s coming from the NW, but the wind is all wrong. It’s either onshore or cross-onshore most of the time, with moderate breezes that’ll chop the surface up real nasty. The combined energy is low, mostly in the double digits (76, 70, 53) through the first few days, so there’s just no push in the water. Even the occasional 5 ft bump on the 7th and 8th gets ruined by the wind. There’s a brief moment on Friday the 4th morning when it goes glassy with a little 2 ft swell, but it’s so weak it’s hardly worth paddling out for. This is a proper lull.
Now, the real standout is a long way off, but it looks like a beauty. On the morning of Wednesday the 16th of September, we get a serious pulse of energy. A clean 6 ft NW groundswell, with a long period of 15 seconds, pushing a massive combined energy of 1423. The wind flips to a light ENE cross-off breeze, leaving it glassy. That’s expert-level size and a very long period, so Cogumelo will have proper power, but those long lines might be a bit straight for a beach break—though with that wind, it’ll be a sight to see. This is the pick of the entire 16-day run.
The morning of Tuesday the 15th is worth a mention too as a warm-up. You get a smaller 3 ft NW swell, but the wind goes cross-off from the SE, making it clean. The energy is moderate (128), but it’s a decent, clean little session for intermediates if the 16th is too big.
The following morning, Thursday the 17th of September, also holds up well. A 4 ft NW groundswell (period 12 seconds) with a clean, light ENE breeze. Combined energy of 444, so decent power. It’s a solid backup option, but the 16th is the one.
Water temp is currently sitting at 67°, which is a bit colder than normal for the time of year—about 3° off. It’ll warm your bones if you’re in a steamer, but it’s nothing crazy.
So, for the first two weeks, it’s pretty much a write-off. But that Wednesday the 16th morning is a genuine standout. Get your diary out and mark it. That’s the one to wait for.
Rusty
Short Range ForecastMostly dry. Warm (max 39°C on Thu morning, min 22°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Sun morning, min 17°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | |||||||||||||||
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 7 | NW 7 | WNW 8 | WNW 8 | NW 8 | NW 9 | NW 9 | NW 9 | WNW 9 | WNW 9 | NW 8 | NW 6 | WNW 13 | WNW 12 | WNW 11 | NW 10 | NW 9 | NW 8 | NW 7 | NW 7 | NW 6 |
Wave Graph | |||||||||||||||||||||
60 | 59 | 48 | 46 | 69 | 83 | 81 | 118 | 103 | 68 | 180 | 162 | 395 | 500 | 366 | 701 | 580 | 434 | 135 | 211 | 139 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | on | off | glassy | cross-on | cross | cross | on | cross | cross | cross-on | cross | cross | cross-on | cross | cross-on | cross-on | cross | cross | cross-on | cross-on |
High Tide | 7:27PM2.32m | 7:59AM2.28m | 8:42PM2.13m | 9:24AM2.19m | 10:21PM2.06m | 10:59AM2.25m | 11:51PM2.17m | 12:16PM2.46m | 00:57AM2.37m | 1:15PM2.71m | 1:48AM2.58m | 2:03PM2.93m | 2:31AM2.74m | ||||||||
Low Tide | 1:06PM0.58m | 1:34AM0.70m | 2:16PM0.76m | 2:50AM0.87m | 3:53PM0.83m | 4:31AM0.91m | 5:33PM0.72m | 5:58AM0.77m | 6:45PM0.49m | 7:00AM0.55m | 7:39PM0.26m | 7:49AM0.34m | 8:23PM0.07m | ||||||||
7:05 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:09 | — | — | 7:09 | — | — | 7:11 | — | — | |
— | 8:01 | — | — | 8:00 | — | — | 7:59 | — | — | 7:57 | — | — | 7:55 | — | — | 7:53 | — | — | 7:52 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 39 | 30 | 27 | 29 | 29 | 30 | 36 | 29 | 23 | 28 | 27 | 24 | 26 | 24 | 20 | 22 | 22 | 20 | 24 | 23 | 20 |
Feels °C | 36 | 27 | 27 | 29 | 30 | 31 | 35 | 27 | 24 | 26 | 25 | 22 | 24 | 22 | 18 | 19 | 18 | 17 | 23 | 21 | 20 |
Swell 1 Height (m) Direction Period (s) | NW 7 | NW 7 | WNW 8 | WNW 8 | NW 8 | NW 9 | NW 9 | NW 9 | WNW 9 | NNW 12 | NNW 12 | NW 11 | WNW 13 | WNW 12 | WNW 11 | NW 10 | — | — | NW 8 | — | NW 12 |
60 | 59 | 48 | 46 | 69 | 83 | 81 | 118 | 103 | 255 | 235 | 115 | 395 | 500 | 366 | 255 | — | — | 66 | — | 6 | |
Swell 2 Height (m) Direction Period (s) | WNW 9 | SW 14 | NW 7 | NW 6 | SW 13 | SW 13 | NW 5 | NW 16 | NW 14 | WNW 9 | W 16 | WNW 14 | WNW 10 | — | — | — | — | — | — | — | — |
8 | 8 | 21 | 8 | 7 | 7 | 14 | 10 | 191 | 68 | 5 | 115 | 52 | — | — | — | — | — | — | — | — | |
Swell 3 Height (m) Direction Period (s) | SW 14 | SE 7 | S 3 | SW 13 | NW 8 | S 6 | S 12 | S 12 | S 12 | — | W 16 | WNW 9 | NNW 10 | — | — | — | — | — | — | — | — |
8 | 2 | 1 | 7 | 3 | 1 | 3 | 3 | 3 | — | 5 | 31 | 38 | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | WSW 2 | — | — | — | N 3 | — | — | NW 4 | NW 4 | NW 8 | NW 6 | NW 6 | NW 6 | NW 7 | NW 10 | NW 9 | NW 8 | NW 7 | NW 7 | NW 6 |
— | 1 | — | — | — | 6 | — | — | 9 | 16 | 180 | 162 | 101 | 167 | 266 | 701 | 580 | 434 | 135 | 211 | 139 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 39 | 0 | 0 | 11 | 9 | 1 | 454 | 9 | 9 | 626 | 9 | 69 | 340 | 9 | 9 | 592 | 333 | 390 | 689 | 275 |
Best forecast wave conditions in Portugal - Alentejo | |||||||||||||||||||||
Best forecast wave conditions in Portugal | |||||||||||||||||||||
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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.










