
Surf Forecasts:
Bicas surf forecast from 6 Aug 2026:
- Most powerful swell: Wednesday 12 Aug, 4PM (local time) - 4.5ft (1.3m), 9s period, WNW swell with 282 kJ wave energy.
Best Forecast Surf Conditions for Bicas this week:
The most powerful waves expected at Bicas in the next 16 days are 1.3m 9s and forecast to arrive on Wednesday (Aug 12) at 4PM. Winds are predicted to be onshore at the time the swell arrives.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 4PM (Wed 12th Aug) | 4.5ft (1.3m) 9s |
Table - best surf conditions forecast for Bicas over the next 16 days.
The Lowdown
Right, let’s be straight with you. I’ve been staring at the charts for Bicas, and the honest truth is this stretch is looking pretty grim for a surf. We’ve got waves on offer, but they’re mostly junky, wind-blown lines, and the swell window is doing us no favors. The water temp is sitting at about 68°, which is pretty much what you’d expect for this time of year, so at least you won’t be freezing while you’re getting skunked.
The trouble starts on Thursday, August 6th. We’ve got a tiny 1ft swell from the WNW, but a moderate breeze from the NNW is just chopping it up. The energy is weak, coming in at 78, and it’s all just a bit meh. The afternoon brings even more wind, up to 22 mph, and the surf is still poor. Friday the 7th is more of the same – small, onshore slop. It’s not until Saturday the 8th that we see a drop to almost nothing.
The whole first week is just a write-off. The wind is coming from the wrong direction, the swell is too small and short-period, and the waves are closing out for the most part. The combined energy in the water is weak to moderate at best, with a few jumps like on Wednesday the 12th afternoon when we hit 282, but it’s all being wrecked by a fresh onshore breeze. This is a reef break that rarely breaks and is an advanced slab, and with this wave quality, you’d be risking life and limb for nothing.
There’s a slight change on the 15th and 16th where the wind goes a little cross-on, but the surf is still poor. This is one of those stretches where you are better off doing anything else.
If you’re looking for a silver lining, you have to skip ahead a full week. The 20th of August, Thursday morning, sees the wind drop right out – we’re talking glassy conditions. The swell is still weak, a 2ft from the NW at 8 seconds, and the energy is only 64, so it’s not going to be a day of barrels. But the surf, for the first time in over a week, will be clean. This is the standout of the forecast, though I’d be looking at it as a longboard day or a fun logger session. The other tiny window is early on Friday the 21st, with zero wind and a glassy surface, but again we’re scraping the bottom of the barrel at 1ft. The long-range stuff is promising but less certain, and with this much wind, that’s all we can hope for.
Honestly, the setup looks more interesting for kite surfing than paddle surfing for most of this period. If you just gotta get wet, aim for that glassy morning on the 20th. Otherwise, save your energy.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Fri afternoon, min 20°C on Thu night). Winds decreasing (fresh winds from the NW on Thu afternoon, light winds from the NNW by Fri night). | Days 4-6 Weather SummaryMostly dry. Warm (max 23°C on Sun morning, min 19°C on Sun night). Winds decreasing (fresh winds from the NW on Mon afternoon, light winds from the NNW by Tue night). | ||||||||||||||||||||
Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | |||||||||||||||
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 10 | W 10 | W 9 | WNW 9 | NW 9 | WNW 9 | NW 8 | WNW 4 | W 7 | W 7 | WNW 4 | NW 10 | WNW 7 | NW 4 | NW 7 | NW 6 | NW 4 | WNW 10 | WNW 9 | WNW 9 | WNW 9 |
Wave Graph | |||||||||||||||||||||
32 | 48 | 45 | 28 | 156 | 26 | 15 | 16 | 26 | 34 | 29 | 28 | 35 | 40 | 63 | 16 | 36 | 78 | 84 | 282 | 138 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | cross-on | on | on | cross-on |
High Tide | 9:06PM2.77m | 9:49AM2.74m | 10:31PM2.69m | 11:12AM2.80m | 11:57PM2.74m | 12:28PM2.97m | 1:09AM2.89m | 1:31PM3.19m | 2:07AM3.06m | 2:24PM3.40m | 2:56AM3.21m | 3:11PM3.56m | 3:40AM3.31m | ||||||||
Low Tide | 2:42PM1.24m | 3:21AM1.26m | 4:06PM1.29m | 4:45AM1.30m | 5:38PM1.21m | 6:07AM1.22m | 6:54PM1.02m | 7:14AM1.05m | 7:55PM0.80m | 8:09AM0.87m | 8:46PM0.61m | 8:56AM0.72m | 9:31PM0.49m | ||||||||
6:41 | — | — | 6:43 | — | — | 6:43 | — | — | 6:45 | — | — | 6:46 | — | — | 6:47 | — | — | 6:47 | — | — | |
— | 8:42 | — | — | 8:40 | — | — | 8:39 | — | — | 8:37 | — | — | 8:37 | — | — | 8:36 | — | — | 8:35 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 21 | 26 | 27 | 22 | 24 | 23 | 21 | 23 | 23 | 20 | 23 | 23 | 20 | 23 | 23 | 20 | 24 | 26 | 22 |
Feels °C | 21 | 20 | 18 | 22 | 22 | 20 | 21 | 20 | 21 | 20 | 19 | 18 | 20 | 19 | 18 | 20 | 19 | 18 | 21 | 21 | 19 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | W 10 | W 9 | WNW 9 | S 12 | WNW 9 | WNW 9 | S 11 | W 7 | W 7 | S 11 | NW 10 | NW 9 | W 11 | WNW 10 | WNW 6 | WNW 12 | WNW 10 | WNW 9 | — | WNW 9 |
32 | 48 | 45 | 28 | 3 | 26 | 15 | 3 | 26 | 34 | 2 | 24 | 26 | 2 | 11 | 12 | 14 | 78 | 84 | — | 138 | |
Swell 2 Height (m) Direction Period (s) | NNW 8 | S 13 | S 13 | NNW 8 | — | S 12 | W 6 | — | N 7 | NNW 11 | — | S 11 | S 12 | S 12 | NW 13 | WNW 10 | NW 12 | NW 10 | NNW 11 | — | NNW 10 |
28 | 3 | 3 | 14 | — | 3 | 2 | — | 1 | 12 | — | 2 | 3 | 3 | 7 | 10 | 6 | 4 | 11 | — | 10 | |
Swell 3 Height (m) Direction Period (s) | WNW 7 | — | S 13 | S 12 | — | NW 8 | S 12 | — | NW 12 | N 7 | — | S 11 | — | — | NW 13 | NW 12 | — | NW 12 | — | — | — |
9 | — | 3 | 3 | — | 2 | 3 | — | 6 | 1 | — | 2 | — | — | 7 | 6 | — | 6 | — | — | — | |
Wind waves Height (m) Direction Period (s) | NW 4 | NW 4 | NNW 5 | NW 6 | NW 9 | NW 4 | NW 8 | WNW 4 | NW 3 | — | WNW 4 | WNW 5 | WNW 7 | NW 4 | NW 7 | NW 6 | NW 4 | NW 5 | NW 9 | WNW 9 | NNW 4 |
9 | 40 | 40 | 24 | 156 | 13 | 15 | 16 | 4 | — | 29 | 28 | 35 | 40 | 63 | 16 | 36 | 25 | 39 | 282 | 11 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 31 | 598 | 320 | 175 | 960 | 28 | 28 | 544 | 28 | 28 | 778 | 31 | 33 | 601 | 31 | 62 | 488 | 31 | 20 | 606 | 20 |
Best forecast wave conditions in Lisboa | |||||||||||||||||||||
Best forecast wave conditions in Portugal | |||||||||||||||||||||
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Information about the Bicas Surf forecast
The above surf forecast table for Bicas provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Bicas can be found by selecting the local surf guide option on the grey menu. Our Bicas 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 (Bicas) 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 Bicas 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.
Bicas is 9 km (6 miles) from Sesimbra. If you plan a holiday in Lisboa, look for hotels and other accommodation in Sesimbra. Sesimbra has rooms for a wide range of budgets as well as car hire and transport links.











