Surf Forecasts:
Bicas surf forecast from 7 Aug 2026:
- Most powerful swell: Friday 14 Aug, 4PM (local time) - 4.5ft (1.3m), 8s period, NW swell with 256 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 8s and forecast to arrive on Friday (Aug 14) 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 (Fri 14th Aug) | 4.5ft (1.3m) 8s |
Table - best surf conditions forecast for Bicas over the next 16 days.
The Lowdown
Alright, let’s get this straight. Looking at the next couple of weeks, it’s pretty grim for a while. We’ve got a stretch of days with no real surf to get excited about. The onshores are howling, and the swell is just a mess. We’re looking at a solid week of nothing before things finally start to wake up.
The first real window of opportunity shows up on the morning of Saturday the 15th. It’s not huge, but it’s the first time we see any real potential. The wind is dead glassy, and the swell is a clean 5ft from the northwest with a period of 8 seconds. That’s when the energy finally starts to build. It’s a small window, but for a spot like Bicas that’s been getting hammered by onshores, this is the one to watch. The morning is the key; the afternoon is back to onshore junk.
Then there’s another shot on the morning of Monday the 17th. The swell is slightly bigger at 5ft from the northwest, and it’s pure glass again. The energy is strong, and the waves should have some push to them. It’s a Monday, so the crowds might be a bit less, but Bicas is a place that’s rarely breaking, so when it does, you’ve got to be on it. This is probably the best of the bunch, a solid combo of size, clean conditions, and that rare break finally working.
After that, things get a bit ordinary again. The onshores come back, and the swell drops off. There’s a few mornings with clean conditions and rideable waves, but nothing that’s going to get the heart racing. The 19th and 20th have some clean morning sessions, but the swell is small, only around 2ft to 4ft. It’s surfable, but you’d be scratching for a wave.
The water temp is about normal for this time of year, so no need to dig out the thickest suit.
So, to sum it up: the first week is a write-off. Get your other chores done. Then, Saturday the 15th and Monday the 17th are your standouts. Both mornings are glassy, with decent NW swell and good energy. The 17th looks to have a touch more size. If you can only pick one, I’d be looking at that Monday morning. It’s not a huge swell, but it’s clean, and that’s everything for a spot like this.
Rusty
Short Range ForecastMostly dry. Warm (max 27°C on Fri afternoon, min 19°C on Sun night). Winds decreasing (fresh winds from the NW on Fri afternoon, light winds from the NNW by Sat night). | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Wed afternoon, min 19°C on Mon night). Winds decreasing (fresh winds from the NW on Mon afternoon, light winds from the NNW by Wed night). | |||||||||||||||||||
Fri 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | ||||||||||||||
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 9 | WNW 9 | WNW 9 | WNW 8 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | NW 4 | NW 5 | NW 5 | NW 4 | W 10 | WNW 9 | NW 9 | WNW 9 | W 9 | NW 9 | WNW 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 135 | 26 | 26 | 55 | 40 | 69 | 111 | 73 | 34 | 40 | 21 | 12 | 29 | 51 | 86 | 247 | 110 | 101 | 255 | 82 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | on | cross-on | on | on | cross-on | on | on | cross-on | on | on | cross-on | on | on | cross-on |
High Tide | 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 | 3:55PM3.64m | ||||||||
Low Tide | 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 | 9:40AM0.62m | 10:13PM0.45m | |||||||
 |  | |  |  | | | | | | | | | | | | | | | | |
 | — | — | 6:43 | — | — | 6:45 | — | — | 6:46 | — | — | 6:47 | — | — | 6:47 | — | — | 6:48 | — | — |
 | 8:40 | — | — | 8:39 | — | — | 8:37 | — | — | 8:37 | — | — | 8:36 | — | — | 8:35 | — | — | 8:34 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 24 | 23 | 22 | 21 | 23 | 22 | 21 | 23 | 23 | 20 | 23 | 24 | 20 | 25 | 26 | 23 | 26 | 27 | 22 |
Feels °C | 22 | 22 | 22 | 21 | 21 | 21 | 19 | 20 | 20 | 19 | 18 | 20 | 20 | 18 | 23 | 22 | 21 | 23 | 23 | 20 |
Swell 1 Height (m) Direction Period (s) | S 12 | WNW 9 | WNW 9 | N 8 | WNW 7 | WNW 7 | NW 10 | WNW 7 | NW 7 | S 12 | NW 7 | W 6 | NW 12 | W 10 | WNW 9 | NW 9 | WNW 9 | W 9 | — | WNW 9 |
| kJ | 3 | 26 | 26 | 4 | 40 | 69 | 17 | 73 | 14 | 3 | 13 | 11 | 23 | 51 | 86 | 3 | 110 | 101 | — | 82 |
Swell 2 Height (m) Direction Period (s) | S 12 | NNW 8 | NNW 8 | S 11 | NW 12 | NW 11 | S 11 | NW 10 | NW 9 | — | WNW 6 | NW 7 | W 12 | NNW 11 | NNW 10 | — | NNW 11 | NW 6 | — | NW 11 |
| kJ | 3 | 14 | 6 | 3 | 6 | 19 | 2 | 15 | 21 | — | 7 | 7 | 3 | 11 | 10 | — | 11 | 15 | — | 30 |
Swell 3 Height (m) Direction Period (s) | — | S 12 | W 5 | — | N 7 | S 11 | — | S 11 | S 12 | — | WNW 10 | WNW 10 | — | NW 8 | NW 10 | — | N 9 | NNW 10 | — | — |
| kJ | — | 3 | 2 | — | 1 | 2 | — | 2 | 3 | — | 11 | 10 | — | 3 | 4 | — | 2 | 9 | — | — |
Wind waves Height (m) Direction Period (s) | NW 9 | NW 4 | — | WNW 8 | NW 3 | — | WNW 7 | NNW 3 | WNW 7 | NW 4 | NW 5 | NW 5 | NW 4 | NW 5 | NW 5 | NW 9 | NNW 5 | NW 6 | NW 9 | NNW 5 |
| kJ | 135 | 6 | — | 55 | 3 | — | 111 | 2 | 34 | 40 | 21 | 12 | 29 | 30 | 20 | 247 | 37 | 31 | 255 | 58 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 960 | 28 | 98 | 463 | 30 | 30 | 333 | 20 | 31 | 541 | 68 | 62 | 459 | 31 | 31 | 478 | 27 | 20 | 349 | 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.
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