Surf Forecasts:
Cogumelo surf forecast from 28 Aug 2026:
- Best quality surf: Saturday 29 Aug, 7AM (local time) - 6ft (1.8m), 10s period, NW swell with cross-offshore winds.
- Most powerful swell: Friday 28 Aug, 1PM (local time) - 7ft (2.2m), 11s period, WNW swell with 1,186 kJ wave energy.
- Next surfable swell (1★+): Saturday 29 Aug, 7AM (local time) - 6ft (1.8m), 10s 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 Saturday (Aug 29) at 7AM. The primary swell is predicted to be 1.8m and 10s period. 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 2.2m 11s and forecast to arrive on Friday (Aug 28) at 1PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 6s period and expected on Tuesday (Sep 01) at 1AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sat 29th Aug) | 6ft (1.8m) 10s |
| Best Surf | 7AM (Sat 29th Aug) | 6ft (1.8m) 10s |
| Most Powerful | 1PM (Fri 28th Aug) | 7ft (2.2m) 11s |
Table - best surf conditions forecast for Cogumelo over the next 16 days.
The Lowdown
Right, gather 'round, grab a coffee. Rusty here. Let's have a look at what's cooking for our little stretch of coast.
The next couple of weeks are a bit of a mixed bag, to be honest. We've got a solid pulse of energy coming through, but the wind is going to be a real pain for a lot of it, keeping things messy. The good news is there are a couple of truly clean windows to get excited about, but you'll have to be patient.
The first real chance to get wet starts on Friday the 28th. The swell is pumping in at a solid 7 ft from the WNW, with a decent 10-second period giving it some punch. The combined swell energy is a hefty 1020 – that's a lot of power in the water. But Friday morning is the only time to be in the water. The wind is a light 3 mph from the NNW, just a slight cross, so it'll be a bit bumpy but surfable. The water temp is running at 69°, which is pretty much normal for this time of year, so no wetsuit drama. Friday afternoon is a write-off, with the wind swinging NW and blowing 12 mph, making it a choppy mess.
Saturday the 29th is one to sleep in for. The swell drops to 5 ft, but the wind is already on it, turning it into a washing machine.
Sunday the 30th through to Tuesday the 1st of September is a proper flat spell for quality. The swell is there, but it's small and the wind is just relentless, mostly cross-on and fresh. The energy is moderate at best, and the conditions are just poor. If you're desperate, you could find a knee-high bump on Monday morning, but it's not worth the effort.
Now, here's where it gets interesting. Wednesday the 2nd of September, the morning is our first real standout. The swell has dropped to 5 ft from the NW, but the wind goes light and cross-off from the NNE at 9 mph. The combined energy is still moderate at 321, but the conditions are clean. This is a good window for a intermediate surfer, though the 5 ft swell is a bit much for a total beginner. The crowd situation at Cogumelo is 'often', so expect company.
The run of average conditions continues until Thursday the 10th of September. That morning, mark it on your calendar. It's a proper standout. We've got a 7 ft swell from the NW, with a 9-second period, and the combined energy is a strong 723. But the real magic is the wind. It's glassy. A 3 mph from the NNE, dead flat water. This is the pick of the month. The swell is over 8 ft, so this is for experienced surfers only. The 9-second period is a bit short, so the waves might be a little crumbly, but with glassy conditions, it'll be a fun, powerful wave. Crowds are likely, so get there early.
After that, the swell just dies. Friday the 11th of September sees a tiny 0.7 ft, 21-second period groundswell from the W. That's a very long period, but it's so small it's hardly registering. The rest of the forecast is a disappearing act, with no energy coming through for the weekend.
So, to sum it up: the best of the best are the morning of Wednesday the 2nd of September for a clean, fun size, and the absolute standout is the glassy morning of Thursday the 10th of September for the bigger, more powerful surf. Don't waste your energy on the rest.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Sat morning, min 17°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Wed morning, min 17°C on Mon night). Winds decreasing (fresh winds from the NW on Tue afternoon, calm by Wed night). | ||||||||||||||||||||
Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | |||||||||||||||
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 10 | WNW 11 | NW 10 | NW 10 | NW 9 | NW 6 | NW 8 | NW 8 | NW 9 | NW 9 | NW 9 | NW 10 | NW 9 | NW 9 | NW 7 | NW 8 | NW 8 | NW 7 | NW 8 | NW 7 | NW 7 |
Wave Graph | |||||||||||||||||||||
1020 | 1123 | 842 | 469 | 351 | 92 | 145 | 196 | 159 | 132 | 325 | 196 | 414 | 515 | 372 | 299 | 253 | 289 | 143 | 107 | 55 | |
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 | cross | cross-on | cross | cross-off | cross-on | cross-off | cross-off | cross-on | glassy |
High Tide | 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 | 6:11AM2.59m | 6:32PM2.54m | 6:58AM2.44m | 7:27PM2.32m | ||||||||
Low Tide | 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 | 12:15PM0.41m | 00:40AM0.49m | 1:06PM0.58m | 1:34AM0.70m | ||||||||
7:01 | — | — | 7:01 | — | — | 7:03 | — | — | 7:03 | — | — | 7:03 | — | — | 7:05 | — | — | 7:05 | — | — | |
— | 8:10 | — | — | 8:08 | — | — | 8:07 | — | — | 8:06 | — | — | 8:05 | — | — | 8:02 | — | — | 8:01 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 22 | 20 | 25 | 23 | 21 | 25 | 24 | 22 | 25 | 25 | 20 | 23 | 23 | 19 | 28 | 28 | 23 | 32 | 27 | 22 |
Feels °C | 21 | 19 | 20 | 22 | 20 | 20 | 24 | 22 | 20 | 22 | 22 | 17 | 19 | 19 | 15 | 25 | 24 | 23 | 31 | 26 | 23 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | WNW 11 | NW 10 | NW 10 | — | NW 8 | NW 8 | W 13 | NW 9 | NW 9 | NW 11 | NW 10 | SW 15 | SW 15 | SSW 14 | NW 8 | SSW 15 | NW 7 | NW 8 | SW 14 | NW 7 |
1020 | 1123 | 842 | 469 | — | 80 | 145 | 3 | 159 | 132 | 31 | 196 | 9 | 8 | 20 | 299 | 23 | 289 | 143 | 8 | 55 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | W 10 | — | W 12 | WNW 11 | SW 16 | WNW 10 | — | — | — | SSW 15 | — | SW 14 | SW 14 | SW 14 | NW 8 |
— | — | — | — | — | — | 2 | — | 3 | 24 | 10 | 19 | — | — | — | 22 | — | 8 | 8 | 8 | 18 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | SW 17 | — | SW 16 | — | — | — | — | — | — | — | — | SW 14 |
— | — | — | — | — | — | — | — | — | 12 | — | 10 | — | — | — | — | — | — | — | — | 7 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NW 9 | NW 6 | NW 5 | NW 8 | NW 6 | NW 5 | NW 9 | NW 6 | NW 9 | NW 9 | NW 7 | — | NW 8 | — | — | NW 7 | — |
— | — | — | — | 351 | 92 | 24 | 196 | 104 | 49 | 325 | 152 | 414 | 515 | 372 | — | 253 | — | — | 107 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 9 | 141 | 9 | 9 | 547 | 9 | 9 | 547 | 9 | 9 | 695 | 85 | 401 | 707 | 85 | 0 | 754 | 0 | 0 | 46 | 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.











