Surf Forecasts:
Cogumelo surf forecast from 25 Aug 2026:
- Best quality surf: Friday 28 Aug, 7AM (local time) - 8ft (2.4m), 11s period, WNW swell with glassy winds.
- Most powerful swell: Friday 28 Aug, 10AM (local time) - 8ft (2.5m), 11s period, WNW swell with 1,488 kJ wave energy.
- Next surfable swell (1★+): Friday 28 Aug, 7AM (local time) - 8ft (2.4m), 11s 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 Friday (Aug 28) at 7AM. The primary swell is predicted to be 2.4m and 11s 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 2.5m 11s and forecast to arrive on Friday (Aug 28) at 10AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 8s period and expected on Sunday (Aug 30) at 4AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Fri 28th Aug) | 8ft (2.4m) 11s |
| Best Surf | 7AM (Fri 28th Aug) | 8ft (2.4m) 11s |
| Most Powerful | 10AM (Fri 28th Aug) | 8ft (2.5m) 11s |
Table - best surf conditions forecast for Cogumelo over the next 16 days.
The Lowdown
Alright, Rusty here, let's get into it.
We've got a bit of a slow start, but there's a solid window of clean surf on the horizon if you're patient. The first few days are a write-off with onshore winds and junk. The real action kicks off on Friday the 28th, and again early in September, but the standout is way out there on the 8th of September.
Cogumelo is the only spot on the radar, and it's a fairly consistent break, exposed to the swell. The first good one comes on Friday morning, August 28th. The swell is a solid 7.2ft from the west-northwest with a long 11-second period, packing some serious energy (1165). It's clean, with a light cross-offshore breeze from the north-northeast, so it's going to be well-shaped and fun for the experienced crowd. This is a big swell though, over 5ft, so it's not one for beginners. There's a chance of crowds here, as it's often busy.
Saturday morning, August 29th, is a bit smaller at 4.6ft from the north-west (9 seconds, 325 energy) but still clean with that same light cross-offshore wind. Nice follow-up session.
The next big call is a long way out, on Tuesday, September 8th. This is a massive, expert-only swell. We're looking at 11.5ft from the west-northwest with a very long 14-second period and extreme energy (4065). The wind is glassy, basically nothing from the west (5 km/h), and the water is dead flat. This is a serious, powerful groundswell. Because of the long period, it'll be best on a point or reef setup, but it's just too big for most. Only the real chargers should even look at it. The water temperature is about average for this time of year.
For the rest of the period, the mornings on the 1st and 7th of September offer some clean, smaller waves, but nothing that compares to that Friday the 28th or the monster on the 8th.
Short Range ForecastLight rain (total 5mm), mostly falling on Thu morning. Warm (max 23°C on Tue morning, min 18°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 25°C on Sat morning, min 16°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | |||||||||||||||
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 7 | WNW 7 | WNW 7 | W 6 | W 6 | WNW 8 | W 8 | WNW 8 | WNW 8 | WNW 11 | NW 11 | NW 10 | NW 9 | NW 9 | NW 8 | NW 8 | NW 8 | NW 8 | NW 9 | NW 9 | NW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 199 | 139 | 64 | 61 | 128 | 253 | 368 | 356 | 439 | 1488 | 1090 | 653 | 351 | 304 | 107 | 49 | 142 | 67 | 159 | 343 | 198 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | cross-on | cross-on | on | cross | cross-on | on | cross-on | glassy | cross-on | cross-off | cross-off | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross |
High Tide | 1:54PM2.47m | 2:16AM2.36m | 2:28PM2.66m | 2:49AM2.51m | 3:00PM2.81m | 3:20AM2.63m | 3:32PM2.91m | 3:51AM2.72m | 4:03PM2.96m | 4:23AM2.76m | 4:36PM2.95m | 4:56AM2.75m | 5:10PM2.87m | ||||||||
Low Tide | 8:10PM0.53m | 8:14AM0.52m | 8:42PM0.37m | 8:46AM0.37m | 9:13PM0.23m | 9:17AM0.25m | 9:44PM0.13m | 9:49AM0.18m | 10:14PM0.09m | 10:22AM0.15m | 10:46PM0.10m | 10:56AM0.18m | 11:20PM0.17m | ||||||||
 | |  |  | | | |  | | | | | | |  | | | | | | | |
 | 6:58 | — | — | 6:58 | — | — | 7:00 | — | — | 7:01 | — | — | 7:01 | — | — | 7:03 | — | — | 7:03 | — | — |
 | — | 8:15 | — | — | 8:13 | — | — | 8:12 | — | — | 8:10 | — | — | 8:08 | — | — | 8:07 | — | — | 8:06 | — |
mm | — | — | — | 1 | 1 | — | 3 | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 23 | 20 | 22 | 22 | 20 | 22 | 21 | 20 | 24 | 23 | 21 | 25 | 24 | 20 | 25 | 24 | 21 | 26 | 25 | 20 |
Feels °C | 22 | 22 | 21 | 19 | 21 | 21 | 19 | 18 | 19 | 23 | 20 | 18 | 22 | 21 | 19 | 23 | 22 | 21 | 24 | 22 | 17 |
Swell 1 Height (m) Direction Period (s) | WNW 7 | WNW 7 | WNW 7 | NW 9 | S 11 | WNW 8 | S 11 | WNW 8 | WNW 8 | WNW 11 | NW 11 | NW 10 | NW 9 | — | NW 8 | NW 8 | W 13 | NW 8 | NW 9 | NW 15 | NW 9 |
| kJ | 199 | 139 | 64 | 3 | 2 | 253 | 2 | 356 | 439 | 1488 | 1090 | 653 | 351 | — | 107 | 49 | 3 | 63 | 159 | 8 | 115 |
Swell 2 Height (m) Direction Period (s) | SW 12 | S 12 | W 10 | NW 10 | W 9 | S 11 | — | S 11 | S 11 | — | — | — | — | — | — | S 11 | S 11 | NW 10 | SW 17 | SW 16 | NW 13 |
| kJ | 6 | 3 | 2 | 4 | 2 | 2 | — | 2 | 2 | — | — | — | — | — | — | 2 | 2 | 27 | 12 | 10 | 27 |
Swell 3 Height (m) Direction Period (s) | — | — | SW 12 | S 12 | W 9 | — | — | — | — | — | — | — | — | — | — | W 13 | W 10 | WNW 12 | S 9 | S 9 | SW 16 |
| kJ | — | — | 6 | 3 | 2 | — | — | — | — | — | — | — | — | — | — | 4 | 2 | 14 | 2 | 2 | 10 |
Wind waves Height (m) Direction Period (s) | — | — | — | W 6 | W 6 | — | W 8 | — | — | — | — | — | — | NW 9 | NW 6 | NW 5 | NW 8 | NW 5 | NW 6 | NW 9 | NW 7 |
| kJ | — | — | — | 61 | 128 | — | 368 | — | — | — | — | — | — | 304 | 95 | 20 | 142 | 67 | 80 | 343 | 198 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 547 | 11 | 427 | 73 | 11 | 554 | 547 | 11 | 0 | 73 | 0 | 0 | 547 | 9 | 29 | 547 | 9 | 118 | 85 | 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.
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