Surf Forecasts:
Cogumelo surf forecast from 19 Aug 2026:
- Best quality surf: Thursday 20 Aug, 4AM (local time) - 1.5ft (0.5m), 10s period, WNW swell with cross-offshore winds.
- Most powerful swell: Monday 24 Aug, 1AM (local time) - 6ft (1.9m), 8s period, NW swell with 475 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 4AM (local time) - 1.5ft (0.5m), 10s 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 20) at 4AM. The primary swell is predicted to be 0.5m 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 1.9m 8s and forecast to arrive on Monday (Aug 24) at 1AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 10s period and expected on Saturday (Aug 22) at 1AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Thu 20th Aug) | 1.5ft (0.5m) 10s |
| Best Surf | 4AM (Thu 20th Aug) | 1.5ft (0.5m) 10s |
| Most Powerful | 1AM (Mon 24th Aug) | 6ft (1.9m) 8s |
Table - best surf conditions forecast for Cogumelo over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get straight into what’s shaping up at Cogumelo.
Look, I’ll be honest with you – the next couple of weeks are looking pretty bleak. The entire first half of this forecast period is a write-off. From Wednesday the 19th of August all the way through to the end of the month, it’s nothing but poor surf conditions day after day. The winds are mostly cross-onshore or onshore, and the swell is messy, short-period, and weak. There’s a bit of energy building around the 21st and 22nd, with swell heights hitting 6ft and combined energy readings in the 300 to 400 range (moderate energy), but the wind is just too crap to make anything of it. It’s cross-onshore and choppy, and with periods of only 8 to 9 seconds, the waves will be weak and bumpy. Not worth paddling out for.
The water temperature is about average for the time of year, nothing wild there.
Now, after a long stretch of nothing, things finally start to look promising on the 31st of August, Monday morning. The swell jumps to 5ft from the northwest with a 12-second period (that’s a proper groundswell), and the combined energy hits 805 (strong wave energy). The wind is cross-shore, so the wave quality is marginal but a lot better than what we’ve seen. However, the afternoon gets hammered by a fresh cross-onshore breeze. Keep an eye on the morning window.
But the real standout here – and I mean the only standout in the whole 16-day run – is Wednesday the 2nd of September, first thing in the morning. This is the one to circle on the calendar. Cogumelo is an exposed spot, and the optimum swell direction is southwest, but we’ve got a 5ft northwest groundswell rolling in with an 11-second period, and the combined energy is 606 (strong wave energy). The wind? Cross-offshore from the north-northeast at just 3 mph. That’s damn near glassy. The report says “clean” – and that’s exactly what it’ll be. This is going to produce some clean, well-shaped waves. It’s an intermediate spot with fairly consistent surf, but be aware crowds are often here. Given how long the wait has been, it’ll probably be busy. But for quality, this is the only morning in the whole outlook that delivers.
After that, things fall apart again into early September with poor winds and weaker swell.
So, to sum it up: a massive dry spell, then one clean morning on the 2nd of September. That’s your window.
Stay stoked,
Rusty
Short Range ForecastMostly dry. Warm (max 26°C on Wed morning, min 17°C on Thu night). Winds increasing (calm on Tue night, fresh winds from the NW by Fri afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 22°C on Mon morning, min 16°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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) | SSW 14 | NW 7 | WNW 10 | WNW 9 | WNW 9 | NW 7 | NW 8 | NW 8 | NW 7 | NW 8 | NW 9 | NW 7 | NW 8 | NW 9 | NW 8 | NW 8 | NW 8 | NW 5 | W 11 | NW 6 | NNW 5 |
Wave Graph | |||||||||||||||||||||
20 | 27 | 38 | 47 | 44 | 255 | 181 | 369 | 318 | 408 | 460 | 255 | 311 | 354 | 475 | 297 | 216 | 67 | 2 | 45 | 42 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | on | on | cross | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-on |
High Tide | 7:30AM2.25m | 7:54PM2.12m | 8:22AM2.08m | 8:58PM1.92m | 9:37AM1.97m | 10:30PM1.83m | 11:09AM1.97m | 11:58PM1.89m | 12:23PM2.10m | 00:58AM2.03m | 1:14PM2.28m | 1:41AM2.20m | 1:54PM2.47m | 2:16AM2.36m | |||||||
Low Tide | 1:34PM0.79m | 1:56AM0.90m | 2:34PM0.98m | 2:59AM1.07m | 4:02PM1.08m | 4:33AM1.13m | 5:42PM1.04m | 6:01AM1.05m | 6:49PM0.89m | 6:58AM0.88m | 7:34PM0.71m | 7:39AM0.70m | 8:10PM0.53m | ||||||||
6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — | |
— | 8:22 | — | — | 8:22 | — | — | 8:20 | — | — | 8:19 | — | — | 8:17 | — | — | 8:15 | — | — | 8:15 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 21 | 23 | 23 | 19 | 21 | 21 | 19 | 21 | 21 | 18 | 21 | 21 | 19 | 22 | 22 | 18 | 22 | 21 | 18 |
Feels °C | 26 | 24 | 23 | 22 | 22 | 18 | 18 | 17 | 16 | 18 | 18 | 16 | 19 | 19 | 17 | 19 | 20 | 18 | 19 | 18 | 17 |
Swell 1 Height (m) Direction Period (s) | NNW 8 | NW 7 | WNW 10 | WNW 9 | WNW 9 | W 9 | WNW 9 | SSW 14 | NNW 10 | SSW 14 | SW 14 | NNW 9 | NW 8 | SW 13 | SW 13 | NW 8 | W 8 | NNW 7 | NW 6 | W 8 | W 10 |
37 | 27 | 38 | 47 | 44 | 39 | 25 | 19 | 125 | 20 | 8 | 70 | 311 | 7 | 7 | 297 | 1 | 29 | 43 | 1 | 2 | |
Swell 2 Height (m) Direction Period (s) | WNW 8 | WNW 8 | NNW 7 | NW 6 | SSW 4 | SW 12 | NNW 12 | SW 14 | SSW 14 | — | SW 14 | SW 14 | WNW 8 | — | — | W 8 | SW 13 | W 8 | W 8 | W 10 | W 7 |
6 | 6 | 17 | 12 | 1 | 6 | 54 | 7 | 18 | — | 8 | 8 | 14 | — | — | 1 | 6 | 1 | 1 | 2 | 1 | |
Swell 3 Height (m) Direction Period (s) | SSW 14 | WNW 11 | SSW 4 | SSW 4 | SSW 13 | SW 15 | SSW 14 | — | — | — | — | — | SW 13 | — | — | SW 13 | — | S 12 | W 11 | S 12 | S 12 |
20 | 12 | 3 | 2 | 18 | 9 | 21 | — | — | — | — | — | 7 | — | — | 7 | — | 3 | 2 | 3 | 3 | |
Wind waves Height (m) Direction Period (s) | — | SSW 4 | — | — | NW 6 | NW 7 | NW 8 | NW 8 | NW 7 | NW 8 | NW 9 | NW 7 | — | NW 9 | NW 8 | — | NW 8 | NW 5 | — | NW 6 | NNW 5 |
— | 1 | — | — | 15 | 255 | 181 | 369 | 318 | 408 | 460 | 255 | — | 354 | 475 | — | 216 | 67 | — | 45 | 42 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 11 | 542 | 11 | 121 | 409 | 434 | 91 | 238 | 390 | 85 | 409 | 330 | 77 | 409 | 425 | 77 | 78 | 110 | 77 | 547 | 326 |
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.











