Surf Forecasts:
Bicas surf forecast from 4 Sep 2026:
- Best quality surf: Sunday 6 Sep, 4AM (local time) - 2.5ft (0.7m), 13s period, NW swell with glassy winds.
- Most powerful swell: Monday 7 Sep, 1PM (local time) - 4.5ft (1.4m), 12s period, WNW swell with 569 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 10AM (local time) - 1.5ft (0.5m), 8s period with WNW swell.
Best Forecast Surf Conditions for Bicas this week:
The surf forecast for Bicas over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Sep 04) at 10AM. The primary swell is predicted to be 0.5m and 8s period with a secondary swell of 0.4m and 4s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Bicas in the next 16 days are 1.4m 12s and forecast to arrive on Monday (Sep 07) at 1PM. 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+) | 10AM (Fri 4th Sep) | 1.5ft (0.5m) 8s |
| Best Surf | 4AM (Sun 6th Sep) | 2.5ft (0.7m) 13s |
| Most Powerful | 1PM (Mon 7th Sep) | 4.5ft (1.4m) 12s |
Table - best surf conditions forecast for Bicas over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on the table for the next couple of weeks.
Right off the bat, I gotta be honest with you – this is a tough stretch. For the first ten days, we’re looking at a whole lot of nothing good. The wind is a mess, mostly howling onshore or cross-onshore, and the swell is small and weak. We’re talking about a solid run of poor conditions from the 4th right through to the morning of the 13th. There’s surf, sure, but it’s sloppy, choppy, and just not worth paddling out for. A few of those days the combined energy gets up there – like the 8th morning with a reading of 698 – but with a strong cross-onshore breeze, it’s just a washing machine. If you’re into kiting, that setup might look fun, but for a paddle surfer, it’s a skip.
The real light at the end of the tunnel finally shows up on Monday, the 14th. That morning is the best of the whole outlook. We’ve got a clean 4ft swell from the northwest, and the wind swings around to a light SSE offshore. That’s the kind of glassy, clean condition that makes a reef break like Bicas come alive. Even though this spot is a rare one to break, when it does and the wind is right, it’s a special little wave. The water temp is about average for this time of year, so nothing crazy there.
After that, the 15th morning is still okay with a light offshore, but the swell is a bit smaller. The 16th morning is another real standout – a 4ft NW swell with a light SSW cross-offshore breeze. That’s clean, punchy, and should offer some nice, peelable walls. The 17th morning is glassy but the swell drops back to 3ft, so it’ll be smaller but still fun.
The long-range stuff around the 18th and 19th is just small, clean knee-high dribble. Glassy mornings, but the swell is weak at 2ft, so it’s more of a longboard or flat day.
So, to wrap it up: the first week and a half is a write-off. Your best bet is the morning of Monday the 14th, with the 16th morning being a close second. Bicas is an inconsistent reef, but when the stars align, it’s a proper little gem.
Rusty.
Short Range ForecastMostly dry. Warm (max 33°C on Thu night, min 22°C on Thu night). Winds increasing (calm on Sat morning, fresh winds from the NW by Sun afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Mon morning, min 18°C on Mon night). Winds increasing (light winds from the NNW on Sun night, fresh winds from the NW by Tue afternoon). | ||||||||||||||||||||
Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | |||||||||||||||
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 8 | WNW 8 | NW 9 | NW 9 | NW 9 | NW 13 | NW 12 | NW 11 | WNW 15 | WNW 12 | WNW 12 | WNW 11 | NW 10 | NW 10 | NW 9 | NW 6 | NW 8 | NW 11 | WNW 8 | NW 8 | NNW 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 38 | 90 | 81 | 81 | 83 | 140 | 167 | 422 | 305 | 323 | 368 | 265 | 404 | 408 | 255 | 39 | 191 | 56 | 50 | 96 | 82 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | on | glassy | on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | on | on | on | on | on | cross-on | on | cross-on |
High Tide | 8:08AM2.79m | 8:52PM2.63m | 9:32AM2.70m | 10:30PM2.56m | 11:07AM2.76m | 00:01AM2.67m | 12:25PM2.96m | 1:07AM2.87m | 1:24PM3.20m | 1:58AM3.07m | 2:12PM3.40m | 2:41AM3.23m | 2:55PM3.55m | 3:20AM3.33m | |||||||
Low Tide | 2:25PM1.25m | 2:59AM1.37m | 4:03PM1.31m | 4:40AM1.41m | 5:43PM1.20m | 6:08AM1.28m | 6:55PM0.98m | 7:10AM1.06m | 7:48PM0.75m | 8:00AM0.85m | 8:33PM0.58m | 8:42AM0.68m | 9:13PM0.49m | ||||||||
 | |  |  | | | | | | | | | | | | | | | | | | |
 | 7:07 | — | — | 7:09 | — | — | 7:09 | — | — | 7:09 | — | — | 7:11 | — | — | 7:11 | — | — | 7:13 | — | — |
 | — | 8:02 | — | — | 8:00 | — | — | 8:00 | — | — | 7:58 | — | — | 7:55 | — | — | 7:54 | — | — | 7:52 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 31 | 30 | 31 | 29 | 31 | 27 | 28 | 28 | 24 | 27 | 27 | 21 | 23 | 22 | 20 | 22 | 23 | 20 | 25 | 26 | 21 |
Feels °C | 31 | 28 | 29 | 27 | 28 | 25 | 26 | 24 | 22 | 24 | 23 | 18 | 19 | 17 | 18 | 19 | 19 | 18 | 21 | 20 | 19 |
Swell 1 Height (m) Direction Period (s) | WNW 8 | WNW 10 | NW 9 | NW 9 | NW 9 | WNW 9 | NW 12 | WNW 18 | WNW 15 | WNW 12 | WNW 12 | WNW 11 | WNW 10 | — | — | NW 8 | NW 13 | WNW 8 | WNW 8 | NW 12 | NNW 11 |
| kJ | 38 | 10 | 81 | 81 | 83 | 70 | 167 | 31 | 305 | 323 | 368 | 265 | 294 | — | — | 34 | 6 | 35 | 50 | 73 | 82 |
Swell 2 Height (m) Direction Period (s) | NW 4 | SW 13 | SW 13 | SW 12 | NNW 16 | NW 13 | WNW 9 | S 11 | NW 10 | WNW 9 | — | — | — | — | — | WNW 8 | — | NW 11 | NW 10 | — | WNW 7 |
| kJ | 5 | 7 | 7 | 6 | 24 | 140 | 65 | 3 | 68 | 45 | — | — | — | — | — | 22 | — | 56 | 47 | — | 16 |
Swell 3 Height (m) Direction Period (s) | SW 13 | — | SW 13 | N 17 | SW 12 | N 6 | SW 12 | S 11 | WNW 9 | NW 10 | — | — | — | — | — | — | — | NNW 8 | NW 13 | — | W 10 |
| kJ | 7 | — | 7 | 6 | 6 | 1 | 5 | 3 | 27 | 24 | — | — | — | — | — | — | — | 7 | 44 | — | 2 |
Wind waves Height (m) Direction Period (s) | — | WNW 8 | — | — | — | NW 4 | — | NW 11 | NW 6 | NW 6 | NW 5 | NNW 6 | NW 10 | NW 10 | NW 9 | NW 6 | NW 8 | NW 5 | — | NW 8 | NW 5 |
| kJ | — | 90 | — | — | — | 5 | — | 422 | 40 | 24 | 57 | 68 | 404 | 408 | 255 | 39 | 191 | 35 | — | 96 | 23 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 93 | 20 | 0 | 27 | 20 | 20 | 161 | 20 | 27 | 333 | 27 | 27 | 365 | 193 | 193 | 488 | 175 | 14 | 594 | 518 |
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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