Surf Forecasts:
Cogumelo surf forecast from 31 Aug 2026:
- Best quality surf: Wednesday 2 Sep, 4AM (local time) - 5ft (1.6m), 8s period, NW swell with cross-offshore winds.
- Most powerful swell: Tuesday 1 Sep, 7AM (local time) - 6ft (1.8m), 10s period, NW swell with 573 kJ wave energy.
- Next surfable swell (1★+): Wednesday 2 Sep, 4AM (local time) - 5ft (1.6m), 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 Wednesday (Sep 02) at 4AM. The primary swell is predicted to be 1.6m and 8s period with a secondary swell of 0.2m and 15s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Cogumelo in the next 16 days are 1.8m 10s and forecast to arrive on Tuesday (Sep 01) at 7AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 7s period and expected on Tuesday (Sep 01) at 1AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Wed 2nd Sep) | 5ft (1.6m) 8s |
| Best Surf | 4AM (Wed 2nd Sep) | 5ft (1.6m) 8s |
| Most Powerful | 7AM (Tue 1st Sep) | 6ft (1.8m) 10s |
Table - best surf conditions forecast for Cogumelo over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s cooking at Cogumelo over the next couple of weeks.
The window starts off pretty grim. From Monday, 31st August right through the first week of September, we’re looking at a run of poor surf conditions. The wind is mostly a problem, blowing cross-shore or cross-onshore, and the chop is a real mess. There’s a little blip of hope on Wednesday morning, 2nd September, when a light cross-offshore breeze cleans up a 5ft NW swell. It’s small and the period is only 8 seconds, so the wave quality is average, but it’s the one clean session in a sea of junk. The combined swell energy is moderate (265).
After that, it drops right off. Thursday and Friday, 3rd and 4th September, are tiny, with swell under 3ft and weak energy (30-139). The run of poor conditions lasts for several days, with only the odd clean but ordinary session popping up, like Saturday morning, 5th September, with a 4ft NW swell and a clean cross-off breeze.
The real standout, the one you’ve been waiting for, is Tuesday morning, 15th September. This is a very long-range shout, so take it with a pinch of salt, but the data is mouth-watering. We’ve got a solid 7ft NW groundswell, with a very long period of 14 seconds, and glassy offshore winds out of the east. The combined energy is a massive 1688, which is strong. This is expert-level, clean, powerful surf. The water temperature is 69°F, which is about average for this time of year. The longer period will mean waiting for the sets, but the shape and power will be worth it for the crew who can handle it.
The afternoon of the 15th is still decent at 7ft but the wind shifts cross-onshore, so the morning is the clear winner.
Outside of that Tuesday morning, the rest of the second week is a lot of ordinary, wind-affected drivel. The afternoon of the 14th is a write-off with rain showers and a massive 18-second period swell that will be too straight and tough to handle with the onshore breeze.
So, the call is simple: Tuesday morning, 15th September, is the one to circle. The rest is a battle for scraps.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Wed morning, min 16°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 39°C on Fri afternoon, min 25°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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 9 | NW 9 | NW 10 | NW 9 | NW 9 | NW 8 | NW 8 | NW 8 | NW 7 | NW 9 | NW 9 | NW 6 | NW 8 | NW 8 | NW 9 | NW 9 | NW 9 | WNW 9 | WNW 10 | NW 12 | NW 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 152 | 481 | 241 | 481 | 450 | 408 | 244 | 187 | 171 | 22 | 38 | 60 | 109 | 104 | 84 | 179 | 159 | 71 | 52 | 268 | 163 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross | cross-on | cross | cross-off | cross-on | cross-off | cross | cross-on | cross | cross-off | cross | cross-off | cross-off | on | cross | glassy | on | glassy |
High Tide | 5:10PM2.87m | 5:31AM2.70m | 5:48PM2.73m | 6:11AM2.59m | 6:32PM2.54m | 6:58AM2.44m | 7:27PM2.32m | 7:59AM2.28m | 8:42PM2.13m | 9:24AM2.19m | 10:21PM2.06m | 10:59AM2.25m | 11:51PM2.17m | ||||||||
Low Tide | 10:56AM0.18m | 11:20PM0.17m | 11:33AM0.27m | 11:57PM0.31m | 12:15PM0.41m | 00:40AM0.49m | 1:06PM0.58m | 1:34AM0.70m | 2:16PM0.76m | 2:50AM0.87m | 3:53PM0.83m | 4:31AM0.91m | 5:33PM0.72m | ||||||||
 | |  | |  | | | | | | | | | |  | | | | | | | |
 | 7:03 | — | — | 7:03 | — | — | 7:05 | — | — | 7:05 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — |
 | — | 8:06 | — | — | 8:05 | — | — | 8:02 | — | — | 8:01 | — | — | 8:00 | — | — | 7:59 | — | — | 7:57 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 24 | 20 | 23 | 24 | 20 | 27 | 25 | 23 | 32 | 33 | 26 | 35 | 39 | 32 | 39 | 30 | 27 | 32 | 29 | 26 |
Feels °C | 20 | 20 | 17 | 20 | 21 | 18 | 25 | 23 | 23 | 29 | 30 | 25 | 30 | 34 | 29 | 37 | 28 | 26 | 32 | 28 | 27 |
Swell 1 Height (m) Direction Period (s) | NW 9 | SW 16 | NW 10 | SW 15 | SW 15 | SSW 14 | NW 8 | SSW 15 | NW 7 | NNW 7 | NW 9 | NW 6 | NW 8 | NW 10 | NW 6 | NW 9 | NW 9 | NNW 13 | NW 12 | NW 12 | NW 11 |
| kJ | 152 | 10 | 241 | 9 | 8 | 21 | 244 | 23 | 171 | 90 | 38 | 60 | 109 | 27 | 97 | 179 | 159 | 479 | 330 | 268 | 163 |
Swell 2 Height (m) Direction Period (s) | WNW 11 | — | SW 16 | — | — | — | SSW 15 | — | SW 14 | NW 9 | SW 14 | NW 8 | NW 11 | SW 13 | NW 9 | NW 18 | NW 16 | WNW 9 | WNW 10 | W 10 | W 9 |
| kJ | 24 | — | 10 | — | — | — | 21 | — | 8 | 22 | 8 | 35 | 5 | 7 | 84 | 12 | 124 | 71 | 52 | 70 | 41 |
Swell 3 Height (m) Direction Period (s) | SW 17 | — | — | — | — | — | — | — | — | SW 14 | SW 14 | SW 14 | SW 13 | S 5 | SW 13 | NW 14 | S 12 | WNW 11 | — | — | NW 16 |
| kJ | 12 | — | — | — | — | — | — | — | — | 8 | 8 | 7 | 7 | 1 | 7 | 8 | 3 | 12 | — | — | 10 |
Wind waves Height (m) Direction Period (s) | NNW 6 | NW 9 | NNW 7 | NW 9 | NW 9 | NW 8 | — | NW 8 | — | — | NNW 7 | — | — | NW 8 | — | — | — | — | — | — | — |
| kJ | 93 | 481 | 237 | 481 | 450 | 408 | — | 187 | — | — | 59 | — | — | 104 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 85 | 85 | 118 | 85 | 85 | 9 | 0 | 77 | 0 | 19 | 25 | 9 | 0 | 77 | 5 | 0 | 39 | 5 | 0 | 39 | 0 |
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.
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