Surf Forecasts:
Cogumelo surf forecast from 18 Aug 2026:
- Best quality surf: Thursday 20 Aug, 7AM (local time) - 1.5ft (0.5m), 9s period, WNW swell with glassy winds.
- Most powerful swell: Sunday 23 Aug, 7PM (local time) - 7ft (2.1m), 8s period, NW swell with 478 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 7AM (local time) - 1.5ft (0.5m), 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 20) at 7AM. The primary swell is predicted to be 0.5m and 9s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Cogumelo in the next 16 days are 2.1m 8s and forecast to arrive on Sunday (Aug 23) 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 6s period and expected on Saturday (Aug 22) at 10PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Thu 20th Aug) | 1.5ft (0.5m) 9s |
| Best Surf | 7AM (Thu 20th Aug) | 1.5ft (0.5m) 9s |
| Most Powerful | 7PM (Sun 23rd Aug) | 7ft (2.1m) 8s |
Table - best surf conditions forecast for Cogumelo over the next 16 days.
The Lowdown
Alright, this is Rusty. Let’s get into it.
Right off the bat, I gotta be straight with you: we are looking at a long stretch of pretty ordinary conditions here at Cogumelo. The swell direction is mostly coming from the NW or WNW, and the wind is almost constantly blowing cross-onshore or onshore, which is going to leave things lumpy and choppy for days on end. There’s a real gap of almost no surf on offer until we get to Thursday morning, the 20th of August.
Now, Thursday morning the 20th of August, we finally get a bit of a window. The swell is tiny, just 2ft from the WNW, with a short period of 9 seconds. But the wind goes glassy – absolutely dead calm. That means the surface will be clean as a whistle, even if the waves are small. The combined energy is weak (52), so it’s not going to be powerful, but for a quiet, clean session on a small board, it might be your best bet in this whole run. The water temp is about average for the time of year.
Things get a bit bigger on Friday the 21st, with 5ft from the NW in the morning, but the period is a short 8 seconds and the wind is a messy cross-onshore at 12 mph – the energy jumps to a moderate 302, but the quality is poor. That afternoon and through the weekend, the wind picks up even more, with fresh breezes up to 19 mph making it lumpy. For the experienced guys, Saturday afternoon the 22nd sees a bump to 5ft with energy at 434, but again, it’s all wind-affected.
The second week looks pretty bleak. From Monday the 24th onward, it’s a constant story of small to medium NW swell (mostly 4ft to 5ft) with short periods and persistent cross-onshore wind. The energy figures are mostly in the low to mid 100s and 200s, but it’s all “poor surf conditions” in the data. Friday the 28th morning offers a tiny glimmer: 5ft from the NW with a light cross-shore breeze, and the energy at 242, but it’s still only rated as marginal. Saturday the 29th morning is similar, with 5ft and light cross-onshore wind, energy at 314 – again, just marginal.
Honestly, if you’re desperate for a paddle, that glassy Thursday morning the 20th of August is the standout. For the rest, unless you love battling onshore chop, you might be better off waiting for the next system to roll through. Given the swell is over 5ft at times and the quality is poor with strong winds, this setup looks more interesting for kite surfing than paddle surfing on most days.
Stay patient, folks.
- Rusty
Short Range ForecastMostly dry. Warm (max 26°C on Tue morning, min 19°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Fri morning, min 17°C on Fri night). Mainly fresh winds. | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
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 8 | SSW 15 | SSW 15 | SSW 14 | WNW 11 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | NW 8 | NW 7 | NW 7 | WNW 8 | NW 9 | SW 14 | WNW 8 | NW 8 | NW 7 | NW 8 | NW 8 | NW 7 |
Wave Graph | |||||||||||||||||||||
10 | 22 | 21 | 20 | 12 | 38 | 47 | 44 | 44 | 281 | 194 | 227 | 28 | 418 | 8 | 13 | 475 | 318 | 223 | 229 | 163 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | glassy | cross | cross-on | cross-off | glassy | on | cross | cross-on | cross-on | cross | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross |
High Tide | 6:47AM2.43m | 7:07PM2.37m | 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 | |||||||
Low Tide | 12:48PM0.57m | 1:11AM0.68m | 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 | ||||||||
6:52 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — | 6:56 | — | — | |
— | 8:23 | — | — | 8:22 | — | — | 8:22 | — | — | 8:20 | — | — | 8:19 | — | — | 8:17 | — | — | 8:15 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 21 | 26 | 25 | 21 | 24 | 24 | 20 | 21 | 21 | 19 | 21 | 21 | 19 | 20 | 20 | 19 | 24 | 22 | 18 |
Feels °C | 25 | 23 | 23 | 25 | 24 | 23 | 24 | 23 | 20 | 17 | 17 | 16 | 18 | 18 | 16 | 16 | 15 | 16 | 22 | 19 | 17 |
Swell 1 Height (m) Direction Period (s) | NNW 8 | NNW 8 | NW 8 | NNW 8 | NNW 7 | WNW 10 | WNW 9 | WNW 9 | WNW 9 | NW 8 | NNW 11 | WNW 9 | WNW 8 | SW 14 | SW 14 | WNW 8 | SW 13 | W 9 | W 8 | W 8 | W 8 |
114 | 84 | 60 | 41 | 21 | 38 | 47 | 44 | 44 | 281 | 78 | 32 | 28 | 8 | 8 | 13 | 7 | 6 | 1 | 5 | 5 | |
Swell 2 Height (m) Direction Period (s) | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | NNW 7 | NW 6 | NW 6 | NNW 10 | NW 12 | WNW 9 | SSW 13 | SSW 14 | SW 14 | SW 14 | SW 13 | — | SW 13 | SW 13 | SW 13 | S 12 |
6 | 6 | 7 | 6 | 6 | 19 | 9 | 8 | 11 | 35 | 16 | 18 | 20 | 8 | 8 | 7 | — | 7 | 7 | 6 | 3 | |
Swell 3 Height (m) Direction Period (s) | SW 16 | SSW 15 | SSW 15 | SSW 14 | WNW 11 | SW 5 | SW 4 | SW 4 | SW 4 | SSW 14 | SSW 14 | SW 14 | — | — | — | — | — | — | — | — | — |
10 | 22 | 21 | 20 | 12 | 8 | 5 | 3 | 1 | 21 | 19 | 7 | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | — | — | — | S 3 | SSW 3 | — | — | — | NW 4 | — | NW 7 | NW 7 | NW 10 | NW 9 | NW 7 | NW 8 | NW 8 | NW 7 | NW 8 | NW 8 | NW 7 |
— | — | — | 1 | 1 | — | — | — | 16 | — | 194 | 227 | 392 | 418 | 321 | 428 | 475 | 318 | 223 | 229 | 163 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 11 | 67 | 11 | 11 | 91 | 1 | 0 | 409 | 454 | 707 | 562 | 9 | 91 | 454 | 443 | 695 | 409 | 326 | 25 | 258 | 9 |
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.











