Surf Forecasts:
Cogumelo surf forecast from 30 Aug 2026:
- Best quality surf: Monday 31 Aug, 7AM (local time) - 3.5ft (1.0m), 9s period, NW swell with cross-offshore winds.
- Most powerful swell: Tuesday 1 Sep, 4AM (local time) - 6ft (1.9m), 10s period, NW swell with 681 kJ wave energy.
- Next surfable swell (1★+): Monday 31 Aug, 7AM (local time) - 3.5ft (1.0m), 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 Monday (Aug 31) at 7AM. The primary swell is predicted to be 1.0m and 9s period with a secondary swell of 1.2m and 6s. 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 10s and forecast to arrive on Tuesday (Sep 01) at 4AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 7s period and expected on Tuesday (Sep 01) at 1AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Mon 31st Aug) | 3.5ft (1.0m) 9s |
| Best Surf | 7AM (Mon 31st Aug) | 3.5ft (1.0m) 9s |
| Most Powerful | 4AM (Tue 1st Sep) | 6ft (1.9m) 10s |
Table - best surf conditions forecast for Cogumelo over the next 16 days.
The Lowdown
Alright, let’s break it down in feet and miles per hour.
The first few days are a dud. Cross and cross-onshore winds, chop, and weak to moderate energy. Swell is out of the NW but short-period, under 9 seconds. Water temp is about 69°, normal for the season. Nothing worth getting wet for through Sunday and Monday.
Your first real chance comes on Wednesday, September 2nd, in the morning at Cogumelo. A light cross-offshore breeze from the NNE at 6 mph will clean it right up. Swell is 5ft from the NW with an 8-second period, moderate energy (288). Conditions will be clean, and the spot is fairly consistent. Expect a crowd.
Thursday, September 3rd morning is smaller: 3ft from the NW, period 7 seconds, weak energy (99). Light cross-offshore wind from the ENE at 6 mph keeps it clean but small.
Then a gap until Saturday, September 5th morning – this is the standout. Glassy conditions, 4ft NW swell, 11-second period, moderate energy (421). That longer period will give the waves some punch and shape. It’ll be clean as glass. This is the best session of the outlook. Crowds are likely.
Sunday, September 6th morning has 4ft from the NW with a 12-second period and solid energy (406), but the wind is cross-on from the WNW, so expect some bump.
From Monday, September 7th onward, it’s mostly poor surf with onshore wind and weak energy. There’s a marginal window on Saturday, September 12th morning with a 3ft WNW swell and 11-second period (energy 261), but it’s onshore.
Your best bets: Wednesday morning, September 2nd, and Saturday morning, September 5th. Don’t miss ‘em.
Rusty.
Short Range ForecastMostly dry. Warm (max 25°C on Sun morning, min 16°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 35°C on Thu morning, min 20°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | |||||||||||||||
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 9 | NW 9 | NW 9 | NW 10 | NW 9 | NW 9 | NW 8 | NW 8 | NW 8 | NW 7 | NW 7 | NW 9 | NW 6 | NW 7 | NW 13 | NW 11 | NW 11 | NW 10 | NW 10 |
Wave Graph  | |||||||||||||||||||||
 kJ | 145 | 224 | 159 | 132 | 440 | 273 | 515 | 492 | 423 | 266 | 187 | 156 | 91 | 14 | 104 | 115 | 199 | 320 | 406 | 384 | 293 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross | cross-on | cross | cross | cross-on | cross | cross-off | cross-on | glassy | cross-off | cross-on | glassy | cross | cross-on | glassy | glassy | on | cross-off |
High Tide | 4:36PM2.95m | 4:56AM2.75m | 5:10PM2.87m | 5:31AM2.70m | 5:48PM2.73m | 6:11AM2.59m | 6:32PM2.54m | 6:58AM2.44m | 7:27PM2.32m | 7:59AM2.28m | 8:42PM2.13m | 9:24AM2.19m | 10:21PM2.06m | ||||||||
Low Tide | 10:22AM0.15m | 10:46PM0.10m | 10:56AM0.18m | 11:20PM0.17m | 11:33AM0.27m | 11:57PM0.31m | 12:15PM0.41m | 00:40AM0.49m | 1:06PM0.58m | 1:34AM0.70m | 2:16PM0.76m | 2:50AM0.87m | 3:53PM0.83m | ||||||||
 | |  | | | | |  | | | | | | |  | | | |  | | | |
 | 7:03 | — | — | 7:03 | — | — | 7:03 | — | — | 7:05 | — | — | 7:05 | — | — | 7:07 | — | — | 7:07 | — | — |
 | — | 8:07 | — | — | 8:06 | — | — | 8:05 | — | — | 8:02 | — | — | 8:01 | — | — | 8:00 | — | — | 7:59 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 23 | 21 | 24 | 25 | 20 | 23 | 23 | 20 | 28 | 27 | 25 | 35 | 32 | 28 | 33 | 31 | 26 | 31 | 30 | 25 |
Feels °C | 24 | 21 | 19 | 21 | 22 | 17 | 20 | 19 | 17 | 26 | 25 | 24 | 32 | 29 | 27 | 30 | 28 | 26 | 30 | 29 | 25 |
Swell 1 Height (m) Direction Period (s) | NW 8 | W 13 | NW 9 | NW 9 | NW 11 | NW 10 | SW 15 | SW 15 | SSW 14 | NW 8 | SSW 15 | NW 7 | NW 7 | NW 9 | NW 9 | NW 7 | NW 13 | NW 11 | NW 11 | NW 15 | NW 10 |
| kJ | 145 | 3 | 159 | 132 | 33 | 273 | 9 | 8 | 21 | 266 | 23 | 156 | 91 | 14 | 20 | 115 | 199 | 320 | 406 | 56 | 293 |
Swell 2 Height (m) Direction Period (s) | — | — | WNW 12 | WNW 11 | SW 16 | SW 16 | — | — | — | SSW 15 | — | SW 14 | SW 14 | SW 14 | SW 14 | WNW 8 | WNW 8 | SW 13 | NW 18 | S 12 | NNW 13 |
| kJ | — | — | 14 | 24 | 10 | 10 | — | — | — | 22 | — | 8 | 8 | 8 | 7 | 28 | 28 | 7 | 12 | 3 | 114 |
Swell 3 Height (m) Direction Period (s) | — | — | — | SW 17 | — | — | — | — | — | — | — | — | — | SW 14 | SE 5 | NW 14 | SW 13 | — | S 12 | — | S 12 |
| kJ | — | — | — | 12 | — | — | — | — | — | — | — | — | — | 8 | 1 | 53 | 7 | — | 3 | — | 3 |
Wind waves Height (m) Direction Period (s) | — | NW 8 | NNW 6 | NNW 6 | NW 9 | NNW 7 | NW 9 | NW 9 | NW 8 | — | NW 8 | — | NNE 2 | NNW 7 | NW 6 | — | NW 7 | NW 7 | — | NW 10 | — |
| kJ | — | 224 | 108 | 96 | 440 | 244 | 515 | 492 | 423 | — | 187 | — | 1 | 93 | 104 | — | 102 | 163 | — | 384 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 9 | 547 | 85 | 85 | 85 | 85 | 85 | 85 | 9 | 0 | 77 | 0 | 0 | 39 | 0 | 9 | 73 | 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.
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