
Surf Forecasts:
Cogumelo surf forecast from 15 Sep 2026:
- Best quality surf: Thursday 17 Sep, 10AM (local time) - 7.5ft (2.3m), 10s period, NW swell with cross-offshore winds.
- Most powerful swell: Saturday 19 Sep, 7AM (local time) - 6.5ft (2.0m), 15s period, NW swell with 1,672 kJ wave energy.
- Next surfable swell (1★+): Thursday 17 Sep, 10AM (local time) - 7.5ft (2.3m), 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 Thursday (Sep 17) at 10AM. The primary swell is predicted to be 2.3m 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 2.0m 15s and forecast to arrive on Saturday (Sep 19) 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 2.5m 9s period and expected on Thursday (Sep 17) at 10PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Thu 17th Sep) | 7.5ft (2.3m) 10s |
| Best Surf | 10AM (Thu 17th Sep) | 7.5ft (2.3m) 10s |
| Most Powerful | 7AM (Sat 19th Sep) | 6.5ft (2.0m) 15s |
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's on the cards for the next couple of weeks at our only real player in this game, Cogumelo.
Right off the bat, this isn't a place that's gonna have you paddling out every day. The first part of the week is a write-off. Tuesday the 15th has nothing but tiny, weak, choppy waves. The combined swell energy is only 92, which is about as weak as it gets. You'd be wasting your time. Wednesday the 16th is worse, with the swell jumping up but the wind being a messy cross-onshore, making it a lumpy, blown-out mess. That 8ft NW swell is just getting trashed.
Now, Thursday the 17th is where things get interesting. Thursday morning is your standout. We’ve got a clean 8ft NW swell with a 10-second period, and the wind is a light cross-offshore from the NNE. The energy reading is 1082, so there's real power in the water. This one's for the experienced crew, as anything over 8ft is expert territory, and at 8ft with that kind of push, it's going to be a handful at best. But if you've got the skill, it's gonna be excellent. That morning window is the best of the whole outlook.
Friday the 18th is a step down. Morning still has some size at 6ft, but the wind is a messy cross-shore, and the energy is moderate. The arvos are all cross-onshore chop until Saturday.
Saturday the 19th starts with a complete flat calm – glassy, but no swell at all. The afternoon brings a totally different story: a 14-second period NW groundswell hitting 6ft. That’s some serious long-period energy (1255), which means powerful, well-shaped waves. But with a light cross-onshore wind and the tide possibly playing games, it's only marginal. Still, that long period is a tease for what could be a great wave if the conditions line up.
The next real good window opens up on Monday the 21st. Monday morning sees a clean 4ft NW swell with a clean offshore breeze from the ENE. It’s not huge, but the energy is there (318) and the conditions are clean. Tuesday the 22nd and Wednesday the 23rd mornings are similar – clean, light winds, with small but fun NW swell. The energy is moderate.
But hold on. Thursday the 24th morning is another serious standout. We've got a 5ft NW swell with a 13-second period, and the wind is a gentle offshore from the east. The energy reading jumps to 914. This is really good, clean surf for intermediate to advanced surfers. It's a bit of a wait, but that’s a quality session.
The following week from Friday the 25th through to Monday the 30th has consistent, clean mornings. Most mornings show light offshore or glassy conditions with NW swell hanging around 4ft to 5ft. Nothing massive, but with clean conditions and moderate energy, it’s a solid run of small, fun waves for a longer board. The energy readings are in the 300-400 range, so it's consistent but not pumping.
One last mention: Wednesday the 30th morning has a 6ft WNW swell with a 10-second period and a gentle cross-shore wind. The energy is high at 1114, but the wind is a cross-shore, not offshore, so it's marginal. Could be a wildcard if the wind backs off. Overall, the first week is a bust until Thursday the 17th, then the second week has plenty of clean, smaller days.
Stay safe, and I'll catch you in the water.
- Rusty
Short Range ForecastMostly dry. Warm (max 27°C on Thu morning, min 16°C on Wed night). Winds increasing (calm on Mon night, fresh winds from the NW by Wed afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 32°C on Sun morning, min 16°C on Thu night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | |||||||||||||||
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 10 | NW 5 | NW 6 | NW 9 | NW 9 | NW 10 | NW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NW 16 | NW 14 | NW 14 | NW 13 | SSE 11 | NW 12 | NW 11 | NW 10 | NW 13 | NW 12 |
Wave Graph | |||||||||||||||||||||
47 | 51 | 240 | 772 | 1065 | 1235 | 1082 | 901 | 986 | 612 | 470 | 644 | 0 | 1255 | 746 | 12 | 393 | 292 | 222 | 193 | 416 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-on | cross-on | cross | cross-off | cross-on | cross | cross | cross-on | cross-off | glassy | cross-on | cross-off | off | cross-on | glassy | off | on | glassy |
High Tide | 5:29AM2.66m | 5:47PM2.55m | 6:04AM2.48m | 6:24PM2.30m | 6:41AM2.29m | 7:07PM2.06m | 7:30AM2.09m | 8:09PM1.86m | 8:45AM1.94m | 9:48PM1.76m | 10:29AM1.93m | 11:27PM1.83m | 11:50AM2.07m | 00:28AM2.00m | |||||||
Low Tide | 11:32AM0.36m | 11:48PM0.49m | 12:09PM0.56m | 00:22AM0.71m | 12:51PM0.77m | 1:02AM0.92m | 1:46PM0.98m | 2:02AM1.11m | 3:16PM1.12m | 3:45AM1.19m | 5:10PM1.08m | 5:27AM1.10m | 6:19PM0.91m | ||||||||
7:16 | — | — | 7:16 | — | — | 7:18 | — | — | 7:18 | — | — | 7:18 | — | — | 7:20 | — | — | 7:20 | — | — | |
— | 7:44 | — | — | 7:42 | — | — | 7:39 | — | — | 7:38 | — | — | 7:37 | — | — | 7:36 | — | — | 7:34 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 24 | 20 | 20 | 20 | 19 | 27 | 24 | 21 | 26 | 24 | 20 | 29 | 29 | 22 | 32 | 31 | 23 | 31 | 30 | 21 |
Feels °C | 24 | 22 | 19 | 16 | 16 | 17 | 23 | 18 | 18 | 23 | 20 | 21 | 28 | 28 | 22 | 30 | 30 | 24 | 30 | 28 | 21 |
Swell 1 Height (m) Direction Period (s) | NW 10 | WNW 8 | NW 11 | S 13 | S 12 | NW 10 | NW 10 | S 11 | NW 10 | NW 9 | NW 14 | NW 8 | NW 14 | NW 14 | NW 13 | NNW 12 | NW 12 | NW 11 | NW 10 | NW 10 | NW 12 |
47 | 13 | 58 | 3 | 3 | 1235 | 1082 | 3 | 986 | 612 | 33 | 372 | 1512 | 1255 | 746 | 472 | 393 | 292 | 222 | 163 | 416 | |
Swell 2 Height (m) Direction Period (s) | WNW 8 | WNW 12 | — | — | — | NW 12 | — | S 16 | S 16 | S 15 | NW 20 | NW 16 | — | — | S 13 | SSE 11 | SSE 11 | SSE 11 | NW 14 | NW 13 | NW 5 |
28 | 14 | — | — | — | 52 | — | 5 | 5 | 4 | 15 | 644 | — | — | 3 | 12 | 11 | 23 | 73 | 193 | 23 | |
Swell 3 Height (m) Direction Period (s) | NW 13 | WNW 12 | — | — | — | S 12 | — | — | — | N 16 | S 14 | S 14 | — | — | — | S 13 | S 13 | S 12 | SSE 11 | SSE 10 | S 4 |
7 | 14 | — | — | — | 3 | — | — | — | 5 | 4 | 4 | — | — | — | 3 | 3 | 3 | 23 | 20 | 2 | |
Wind waves Height (m) Direction Period (s) | NW 4 | NW 5 | NW 6 | NW 9 | NW 9 | — | — | NW 10 | — | — | NW 9 | — | — | — | — | — | — | — | — | NW 3 | — |
10 | 51 | 240 | 772 | 1065 | — | — | 901 | — | — | 470 | — | — | — | — | — | — | — | — | 2 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 9 | 562 | 463 | 695 | 409 | 9 | 0 | 562 | 9 | 9 | 78 | 0 | 5 | 9 | 0 | 17 | 9 | 0 | 0 | 39 | 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.










