Surf Forecasts:
Cogumelo surf forecast from 16 Aug 2026:
- Best quality surf: Sunday 16 Aug, 7AM (local time) - 5.5ft (1.7m), 9s period, NW swell with cross-offshore winds.
- Most powerful swell: Sunday 16 Aug, 7AM (local time) - 5.5ft (1.7m), 9s period, NW swell with 421 kJ wave energy.
- Next surfable swell (1★+): Sunday 16 Aug, 7AM (local time) - 5.5ft (1.7m), 9s 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 Sunday (Aug 16) at 7AM. The primary swell is predicted to be 1.7m and 9s period with a secondary swell of 0.1m and 16s. 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 1.7m 9s and forecast to arrive on Sunday (Aug 16) at 7AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 8s period and expected on Monday (Aug 17) at 1PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sun 16th Aug) | 5.5ft (1.7m) 9s |
| Best Surf | 7AM (Sun 16th Aug) | 5.5ft (1.7m) 9s |
| Most Powerful | 7AM (Sun 16th Aug) | 5.5ft (1.7m) 9s |
Table - best surf conditions forecast for Cogumelo over the next 16 days.
The Lowdown
Alright, let’s break this down. Rusty here, and we’re looking at the same spot, just in feet and Fahrenheit.
The only real highlight in this 16-day window is Cogumelo on Sunday morning, August 16. That morning you’ve got clean surf running about 5ft from the NW with a light offshore breeze, combined energy reading a solid 356. Water temp isn’t anything strange for this time of year. The period is short at 8 seconds, so it’s wind swell, but the conditions are glassy and inviting. It’s a good, fun wave for intermediate surfers, and since crowds at Cogumelo are often a thing, you might have some company, but it’s worth it.
That Sunday afternoon the wind flips onshore and the quality tanks, so don’t bother.
Monday the 17th offers up waist-high leftovers around 4ft with a cross-off wind in the morning – you could surf, but it’s nothing special.
Then from Tuesday the 18th through the rest of the first week, it dies right down – surf around 0.7ft to 2ft and mostly onshore. Not worth the walk.
Toward the end of the third week in August, from the 21st to the 25th, the swell comes back up into the 4ft to 5ft range, but it’s all blown out with cross-onshore winds, making it choppy and messy.
Fast forward to Saturday morning, August 29, and there’s a chance with 5ft NW swell and light cross winds, but the forecast says it’s only marginal. The energy is moderate (301), and it could be rideable if the wind plays nice, but don’t get your hopes up.
Into the final days of August, it’s more of the same – moderate NW swell with fresh cross-onshore winds.
So the call is simple: hit Sunday morning, August 16 at Cogumelo for the best of the 16 days. After that, it’s mostly wind junk or tiny waves until maybe that last Saturday.
Rusty.
Short Range ForecastSome drizzle, heaviest during Mon afternoon. Warm (max 29°C on Sun morning, min 19°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Wed morning, min 18°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | |||||||||||||||
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) | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | WNW 8 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | WNW 10 | WNW 9 | NW 8 | NW 7 | NW 8 | NW 8 | NW 8 | NW 9 | NW 9 | NW 9 |
Wave Graph | |||||||||||||||||||||
346 | 244 | 135 | 147 | 145 | 10 | 24 | 22 | 21 | 20 | 19 | 38 | 46 | 57 | 235 | 322 | 304 | 335 | 231 | 155 | 93 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | on | cross-off | cross-off | on | cross | cross-on | cross-on | glassy | glassy | on | glassy | cross-on | on | cross | cross-on | cross-on | cross | cross-on | cross-on | cross |
High Tide | 5:31AM2.74m | 5:47PM2.88m | 6:09AM2.60m | 6:26PM2.64m | 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 | |||||||
Low Tide | 11:29AM0.20m | 11:57PM0.24m | 12:08PM0.37m | 00:33AM0.46m | 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 | ||||||||
6:50 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | |
— | 8:27 | — | — | 8:25 | — | — | 8:23 | — | — | 8:22 | — | — | 8:22 | — | — | 8:20 | — | — | 8:19 | — | |
mm | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 29 | 25 | 23 | 28 | 24 | 20 | 26 | 25 | 20 | 26 | 25 | 20 | 24 | 24 | 20 | 22 | 22 | 19 | 23 | 22 | 19 |
Feels °C | 28 | 24 | 23 | 28 | 24 | 22 | 25 | 24 | 22 | 26 | 26 | 23 | 23 | 23 | 20 | 19 | 19 | 17 | 21 | 20 | 18 |
Swell 1 Height (m) Direction Period (s) | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NNW 8 | NNW 8 | NNW 8 | NW 8 | NNW 8 | NNW 8 | NNW 7 | WNW 9 | NW 8 | WNW 9 | WNW 9 | NNW 11 | WNW 11 | NW 9 | WNW 9 | NW 9 |
346 | 244 | 135 | 147 | 145 | 114 | 84 | 86 | 69 | 42 | 35 | 20 | 46 | 57 | 27 | 16 | 48 | 39 | 231 | 27 | 93 | |
Swell 2 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 15 | W 8 | WNW 9 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 10 | NW 7 | SSW 13 | NNW 10 | SSW 14 | WNW 9 | SSW 14 | WNW 10 | SSW 14 | WNW 9 |
10 | 10 | 8 | 5 | 8 | 7 | 6 | 6 | 7 | 6 | 6 | 38 | 11 | 18 | 10 | 21 | 15 | 18 | 32 | 20 | 48 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | SW 15 | SW 16 | SW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 4 | SSW 4 | NW 11 | SW 15 | W 13 | SSW 14 | SW 14 | SSW 14 | SW 14 | SW 14 |
— | — | — | 8 | 10 | 10 | 24 | 22 | 21 | 20 | 19 | 3 | 1 | 5 | 8 | 3 | 18 | 7 | 20 | 8 | 8 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | SW 3 | SSW 3 | — | — | — | — | SSW 4 | — | — | — | NW 7 | NW 8 | NW 8 | NW 8 | — | NW 9 | — |
— | — | — | — | 3 | 1 | — | — | — | — | 1 | — | — | — | 235 | 322 | 304 | 335 | — | 155 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 11 | 0 | 0 | 78 | 5 | 11 | 129 | 11 | 11 | 11 | 1 | 11 | 384 | 9 | 91 | 454 | 9 | 25 | 118 | 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.











