Surf Forecasts:
Cogumelo surf forecast from 12 Aug 2026:
- Best quality surf: Monday 17 Aug, 7AM (local time) - 6ft (1.9m), 9s period, NW swell with glassy winds.
- Most powerful swell: Saturday 15 Aug, 7PM (local time) - 8ft (2.5m), 8s period, NW swell with 815 kJ wave energy.
- Next surfable swell (1★+): Thursday 13 Aug, 4AM (local time) - 3.5ft (1.0m), 9s 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 (Aug 13) at 4AM. The primary swell is predicted to be 1.0m and 9s period with a secondary swell of 0.8m and 6s. 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 2.5m 8s and forecast to arrive on Saturday (Aug 15) at 7PM. 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 9s period and expected on Monday (Aug 17) at 4AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Thu 13th Aug) | 3.5ft (1.0m) 9s |
| Best Surf | 7AM (Mon 17th Aug) | 6ft (1.9m) 9s |
| Most Powerful | 7PM (Sat 15th Aug) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Cogumelo over the next 16 days.
The Lowdown
Alright, Rusty here again. Let’s break this down for Cogumelo.
It’s a tough forecast overall. This break is fairly consistent, but we have a long stretch of messy wind and small surf. The water’s a bit colder than normal at 68°, so layer up. The one real highlight is a single glassy morning that will be worth waiting for.
From Wednesday, August 12th through Wednesday, August 19th, it’s mostly poor. The surf is tiny to small, and the wind is cross or cross-onshore pretty much all day. Wave heights stay under 3 ft for the first few days, with weak to moderate energy (from 109 up to 200). The swell is from the WNW to NW, but the wind just ruins it.
Friday, August 15th and Saturday, August 16th, the swell picks up. Friday afternoon has 5 ft from the NW with a 9-second period and moderate-strong energy at 459, but it’s cross-onshore at 25 km/h, so it’s lumpy. Saturday morning bumps up to 6 ft from the NW, but the period drops to 8 seconds and the wind is still cross at 20 km/h – choppy.
The one true standout is Monday, August 17th, in the morning. The wind goes glassy, light from the east at just 5 km/h. The swell is a clean 6 ft from the northwest, 9-second period, with strong energy at 495. This is your chance. It’s clean, it’s got power. Expect some company – crowds are often – but it’s the only real session in the whole outlook.
The rest of that week stays poor. Wednesday, August 20th has a 5 ft NW swell with 8-second period, but the wind is still cross-onshore, so it’s marginal at best. After that, the wind stays onshore and the waves get choppy.
In the second week, there’s another short window on Wednesday, August 26th, in the morning. Glassy conditions again, with a 5 ft NW swell and 8-second period, moderate energy at 224. It’s clean and rideable, but the short period means it won’t have the same shape as the 17th. Worth a look if you’re around, but not a highlight.
Bottom line: mark your calendar for the morning of the 17th. That’s your clean session.
Rusty
Short Range ForecastMostly dry. Warm (max 29°C on Wed morning, min 19°C on Thu night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 29°C on Mon morning, min 18°C on Sat night). Winds decreasing (fresh winds from the NW on Sat afternoon, calm by Mon night). | ||||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | |||||||||||||||
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 9 | WNW 10 | WNW 9 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | NW 9 | NW 8 | NW 8 | NW 8 | NW 8 | NW 9 | NW 9 | NW 9 | NW 9 | NW 9 | SW 16 | SSW 16 | SSW 15 | W 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 46 | 125 | 237 | 163 | 132 | 183 | 136 | 318 | 359 | 486 | 669 | 666 | 688 | 492 | 628 | 481 | 349 | 10 | 24 | 22 | 8 |
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 | cross-on | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | on | glassy | cross-on | on | cross-off |
High Tide | 3:03PM3.09m | 3:31AM2.83m | 3:47PM3.18m | 4:13AM2.86m | 4:28PM3.18m | 4:52AM2.83m | 5:08PM3.07m | 5:31AM2.74m | 5:47PM2.88m | 6:09AM2.60m | 6:26PM2.64m | 6:47AM2.43m | 7:07PM2.37m | ||||||||
Low Tide | 9:22PM-0.05m | 9:30AM0.07m | 10:04PM-0.10m | 10:11AM0.04m | 10:43PM-0.06m | 10:50AM0.08m | 11:21PM0.06m | 11:29AM0.20m | 11:57PM0.24m | 12:08PM0.37m | 00:33AM0.46m | 12:48PM0.57m | 1:11AM0.68m | ||||||||
 | |  | | | | | |  | | | |  | | | | | | | | | |
 | 6:47 | — | — | 6:48 | — | — | 6:48 | — | — | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:52 | — | — |
 | — | 8:31 | — | — | 8:30 | — | — | 8:29 | — | — | 8:28 | — | — | 8:27 | — | — | 8:25 | — | — | 8:23 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 29 | 26 | 21 | 29 | 26 | 21 | 26 | 24 | 21 | 24 | 23 | 19 | 23 | 24 | 20 | 29 | 25 | 21 | 29 | 27 | 24 |
Feels °C | 28 | 24 | 22 | 27 | 24 | 22 | 25 | 22 | 20 | 22 | 20 | 17 | 23 | 24 | 22 | 28 | 24 | 22 | 28 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | NW 5 | WNW 10 | WNW 9 | WNW 10 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | — | S 18 | S 18 | S 16 | NW 9 | SW 16 | SW 15 | NW 9 | NW 9 | SW 16 | NW 9 | NNW 9 | NW 9 |
| kJ | 23 | 125 | 237 | 163 | 132 | 183 | 136 | 141 | — | 6 | 6 | 5 | 688 | 10 | 8 | 481 | 349 | 10 | 330 | 270 | 170 |
Swell 2 Height (m) Direction Period (s) | WNW 9 | NNW 9 | NNW 9 | NW 6 | NW 12 | — | — | — | — | — | — | — | SW 16 | S 16 | — | SW 15 | SW 16 | S 13 | SSW 16 | SSW 15 | W 9 |
| kJ | 46 | 17 | 8 | 31 | 37 | — | — | — | — | — | — | — | 10 | 5 | — | 8 | 10 | 4 | 24 | 22 | 6 |
Swell 3 Height (m) Direction Period (s) | WNW 11 | — | — | NNW 10 | NNW 9 | — | — | — | — | — | — | — | — | — | — | S 18 | — | SW 13 | — | — | SW 15 |
| kJ | 40 | — | — | 9 | 8 | — | — | — | — | — | — | — | — | — | — | 6 | — | 7 | — | — | 8 |
Wind waves Height (m) Direction Period (s) | — | NW 5 | NNW 6 | — | NW 5 | NNW 6 | NW 6 | NW 9 | NW 8 | NW 8 | NW 8 | NW 8 | — | NW 9 | NW 9 | — | — | NNW 8 | — | — | — |
| kJ | — | 20 | 64 | — | 31 | 120 | 52 | 318 | 359 | 486 | 669 | 666 | — | 492 | 628 | — | — | 348 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 9 | 73 | 1 | 9 | 73 | 9 | 9 | 303 | 85 | 85 | 695 | 695 | 53 | 78 | 46 | 0 | 51 | 5 | 11 | 39 | 5 |
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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