Surf Forecasts:
Cogumelo surf forecast from 26 Aug 2026:
- Best quality surf: Friday 28 Aug, 4AM (local time) - 6ft (1.9m), 9s period, WNW swell with glassy winds.
- Most powerful swell: Friday 28 Aug, 10PM (local time) - 7ft (2.2m), 10s period, NW swell with 1,040 kJ wave energy.
- Next surfable swell (1★+): Thursday 27 Aug, 10PM (local time) - 6ft (1.9m), 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 (Aug 27) at 10PM. The primary swell is predicted to be 1.9m and 8s period with a secondary swell of 0.1m and 11s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Cogumelo in the next 16 days are 2.2m 10s and forecast to arrive on Friday (Aug 28) at 10PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Tuesday (Sep 01) at 4AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Thu 27th Aug) | 6ft (1.9m) 8s |
| Best Surf | 4AM (Fri 28th Aug) | 6ft (1.9m) 9s |
| Most Powerful | 10PM (Fri 28th Aug) | 7ft (2.2m) 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 we’ve got coming up for the area.
It’s a bit of a slow burn for the next week or so. The swell’s around, but it’s mostly onshore and messy. The real standout action is tucked away right at the end of the window, so you’ll need some patience.
First up, Cogumelo is where we’re looking. The water temp is about average for the time of year right now. We get some small, poor surf from Wednesday the 26th of August through to probably the end of the month. The wind is mostly cross or cross-on from the W or NW, and the swell is small, under 3ft to 6ft, with a weak energy range (31 to 399). Not worth paddling out for, honestly.
Things start to look up a little on Friday the 28th of August morning. There’s a 7ft WNW groundswell (period 10 seconds) building, with light cross-shore N wind. The energy jumps to 810, which is moderate. It’s still a bit marginal for tide, but that’s the best we’ve seen in days. The afternoon gets choppy again though.
After that, we slide back into poor, choppy surf for most of the first week of September. The swell stays in the 4ft to 6ft range, period around 8-9 seconds, and the wind keeps swinging onshore or cross-on. Energy levels are moderate (200-485), but the quality just isn’t there.
Here’s the good news. Wednesday morning the 2nd of September, Cogumelo gets a clean-up with a light cross-offshore NNE breeze. The swell is a clean 5ft from the NW at 8 seconds, energy at 303. This is the first real window of clean conditions.
But the absolute standout, the one to mark in the calendar, is Thursday morning the 3rd of September. We’ve got glassy conditions with a light SSE wind, dead calm. The swell is a clean 4ft from the NW at 9 seconds, energy at 210. That’s going to be the cleanest, most user-friendly day of the whole run. For the more advanced crew, Monday morning the 7th of September also offers glassy conditions with a 3ft NW groundswell (10 seconds, 220 energy) – it’s small but pristine. And Tuesday morning the 8th of September is dead calm and glassy with a 4ft NW swell (7 seconds, 279 energy). Then again, Wednesday morning the 9th of September with glassy conditions and a 5ft NW swell (8 seconds, 239 energy). Also, Thursday morning the 10th of September has clean cross-offshore conditions with a 3ft NW swell (9 seconds, 249 energy). The best of the bunch is definitely that super-clean Thursday the 3rd.
If the swell gets a bit bigger later on, a 7ft wave is right on the edge for beginners, so keep that in mind. The period hangs around that 8-11 second range for most of the run, which is decent shape for a beach break setup, but nothing super long-period. Crowds at Cogumelo are often around, so expect company on those glassy mornings.
To be honest, apart from those glassy windows in early September, a lot of the afternoons look like they’d be more fun if you’ve got a kite. The cross-onshore chop and moderate breeze won’t do much for a paddle surfer.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Wed morning. Warm (max 22°C on Wed morning, min 16°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Sun morning, min 16°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | |||||||||||||||
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) | WSW 6 | W 6 | W 7 | W 7 | WNW 8 | WNW 8 | WNW 10 | WNW 11 | NW 10 | NW 9 | NW 9 | NNW 6 | NW 8 | NW 8 | NW 10 | WNW 9 | NW 9 | NW 7 | NW 9 | NW 9 | NW 8 |
Wave Graph | |||||||||||||||||||||
50 | 148 | 171 | 392 | 460 | 486 | 859 | 873 | 825 | 405 | 343 | 116 | 75 | 182 | 245 | 54 | 351 | 246 | 538 | 497 | 453 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | on | on | cross-on | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross |
High Tide | 2:28PM2.66m | 2:49AM2.51m | 3:00PM2.81m | 3:20AM2.63m | 3:32PM2.91m | 3:51AM2.72m | 4:03PM2.96m | 4:23AM2.76m | 4:36PM2.95m | 4:56AM2.75m | 5:10PM2.87m | 5:31AM2.70m | 5:48PM2.73m | ||||||||
Low Tide | 8:42PM0.37m | 8:46AM0.37m | 9:13PM0.23m | 9:17AM0.25m | 9:44PM0.13m | 9:49AM0.18m | 10:14PM0.09m | 10:22AM0.15m | 10:46PM0.10m | 10:56AM0.18m | 11:20PM0.17m | 11:33AM0.27m | 11:57PM0.31m | ||||||||
6:58 | — | — | 7:00 | — | — | 7:01 | — | — | 7:01 | — | — | 7:03 | — | — | 7:03 | — | — | 7:03 | — | — | |
— | 8:13 | — | — | 8:12 | — | — | 8:10 | — | — | 8:08 | — | — | 8:07 | — | — | 8:06 | — | — | 8:05 | — | |
mm | 2 | 1 | 1 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 22 | 20 | 21 | 21 | 20 | 22 | 22 | 20 | 24 | 23 | 20 | 25 | 24 | 21 | 25 | 25 | 20 | 24 | 23 | 19 |
Feels °C | 20 | 21 | 21 | 18 | 18 | 21 | 20 | 20 | 18 | 21 | 20 | 18 | 24 | 22 | 20 | 22 | 22 | 17 | 21 | 19 | 15 |
Swell 1 Height (m) Direction Period (s) | NW 6 | NW 10 | W 7 | S 11 | WNW 8 | WNW 8 | WNW 10 | WNW 11 | NW 10 | NW 9 | — | NW 8 | NW 8 | NNW 12 | NW 10 | NW 9 | SW 16 | NW 10 | SW 15 | SW 15 | SSW 14 |
10 | 4 | 171 | 2 | 460 | 486 | 859 | 873 | 825 | 405 | — | 77 | 75 | 15 | 245 | 86 | 10 | 246 | 9 | 8 | 21 | |
Swell 2 Height (m) Direction Period (s) | NW 9 | W 9 | S 11 | — | S 11 | S 11 | — | — | — | — | — | — | — | W 13 | WNW 12 | WNW 9 | SW 11 | SW 16 | S 10 | — | — |
3 | 2 | 2 | — | 2 | 2 | — | — | — | — | — | — | — | 3 | 14 | 54 | 5 | 10 | 2 | — | — | |
Swell 3 Height (m) Direction Period (s) | NW 10 | S 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 11 | — | S 10 | — | — | — |
4 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | 30 | — | 2 | — | — | — | |
Wind waves Height (m) Direction Period (s) | WSW 6 | W 6 | — | W 7 | — | — | — | — | — | — | NW 9 | NNW 6 | NW 5 | NW 8 | NW 5 | NW 6 | NW 9 | NW 7 | NW 9 | NW 9 | NW 8 |
50 | 148 | — | 392 | — | — | — | — | — | — | 343 | 116 | 18 | 182 | 51 | 43 | 351 | 237 | 538 | 497 | 453 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 409 | 626 | 11 | 454 | 547 | 46 | 9 | 118 | 110 | 9 | 547 | 9 | 9 | 187 | 9 | 9 | 675 | 118 | 85 | 340 | 85 |
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.











