Surf Forecasts:
Bicas surf forecast from 1 Sep 2026:
- Best quality surf: Friday 4 Sep, 4AM (local time) - 1.5ft (0.5m), 8s period, WNW swell with glassy winds.
- Most powerful swell: Tuesday 1 Sep, 7AM (local time) - 4.5ft (1.3m), 9s period, NW swell with 281 kJ wave energy.
- Next surfable swell (1★+): Friday 4 Sep, 4AM (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 4AM. The primary swell is predicted to be 0.5m and 8s period with a secondary swell of 0.3m and 4s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Bicas in the next 16 days are 1.3m 9s and forecast to arrive on Tuesday (Sep 01) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 3s period and expected on Saturday (Sep 05) at 10AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Fri 4th Sep) | 1.5ft (0.5m) 8s |
| Best Surf | 4AM (Fri 4th Sep) | 1.5ft (0.5m) 8s |
| Most Powerful | 7AM (Tue 1st Sep) | 4.5ft (1.3m) 9s |
Table - best surf conditions forecast for Bicas over the next 16 days.
The Lowdown
Alright, Rusty here. Let's take a good, hard look at what's coming down the pipe for Bicas.
Right off the bat, I gotta be straight with you – the next couple of weeks are looking pretty grim. There's a big ol' gap of flat, junk surf stretching from now all the way into the middle of September. We're talking day after day of onshore winds, small weak swell, and just plain poor conditions. It's a rough stretch.
We see a few mornings around the 4th, 5th, and 6th of September with some cleaner conditions thanks to light cross-offshore breezes, but the swell is tiny – only 2ft to 2ft from the WNW. The combined energy is weak, sitting between 51 and 74. You might get a barely rideable wave if you're desperate, but honestly, it's not worth getting wet for.
The situation doesn't really improve until we get a serious spike in energy on the morning of the 16th of September. That's when things get interesting. The forecast shows a solid 6ft swell rolling in from the WNW with a period of 10 seconds. The combined energy jumps to a whopping 1190, which is proper strong. The wind is forecast to be glassy – completely off – so the surface will be like a mirror. This is the standout, the only real highlight in this entire 16-day window.
Now, a few things to keep in mind. This is Bicas, a reef break that rarely breaks. It's an advanced spot, and with the swell over 5ft, it's going to be too much for beginners. The swell direction from the WNW is right on the money for this spot, which loves a west-northwest pulse. Because it's a reef, that longer-period groundswell will wrap in nicely, offering some proper shaped waves. It's an expert-only session, but for those who are up for it, this looks like a serious, promising session. Crowds are possible here, but on a day like this, with the forecast so far out, you might get lucky.
So, there you have it. A whole lot of nothing until a potential cracker on the 16th. Keep your eye on that one.
Rusty.
Short Range ForecastMostly dry. Warm (max 33°C on Thu afternoon, min 17°C on Mon night). Winds decreasing (fresh winds from the NNW on Tue afternoon, light winds from the NNE by Wed night). | Days 4-6 Weather SummaryMostly dry. Warm (max 37°C on Fri morning, min 21°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | |||||||||||||||
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 9 | NW 9 | NW 9 | NW 8 | NW 8 | NW 7 | NW 7 | WNW 8 | WNW 8 | WNW 8 | NW 8 | NW 9 | WNW 9 | WNW 9 | NW 9 | NW 11 | NW 8 | NW 11 | NW 6 | WNW 11 | WNW 11 |
Wave Graph | |||||||||||||||||||||
263 | 257 | 225 | 112 | 90 | 64 | 39 | 48 | 41 | 38 | 69 | 79 | 68 | 68 | 77 | 82 | 166 | 90 | 51 | 138 | 130 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross-on | on | cross-on | on | on | cross-on | cross-off | on | cross-off | cross-off | cross | cross-off | cross-on | cross-on | on | on | on | cross-on |
High Tide | 5:38AM3.18m | 5:57PM3.24m | 6:19AM3.08m | 6:41PM3.05m | 7:06AM2.94m | 7:36PM2.83m | 8:08AM2.79m | 8:52PM2.63m | 9:32AM2.70m | 10:30PM2.56m | 11:07AM2.76m | 00:01AM2.67m | 12:25PM2.96m | 1:07AM2.87m | |||||||
Low Tide | 11:40AM0.77m | 00:04AM0.82m | 12:22PM0.90m | 00:48AM1.00m | 1:14PM1.08m | 1:43AM1.20m | 2:25PM1.25m | 2:59AM1.37m | 4:03PM1.31m | 4:40AM1.41m | 5:43PM1.20m | 6:08AM1.28m | 6:55PM0.98m | ||||||||
7:05 | — | — | 7:05 | — | — | 7:07 | — | — | 7:07 | — | — | 7:09 | — | — | 7:09 | — | — | 7:09 | — | — | |
— | 8:07 | — | — | 8:06 | — | — | 8:04 | — | — | 8:02 | — | — | 8:00 | — | — | 8:00 | — | — | 7:58 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 22 | 23 | 19 | 23 | 27 | 25 | 29 | 33 | 33 | 37 | 35 | 34 | 33 | 29 | 23 | 23 | 22 | 22 | 25 | 26 | 22 |
Feels °C | 18 | 19 | 16 | 23 | 24 | 23 | 27 | 30 | 29 | 34 | 31 | 31 | 33 | 26 | 25 | 23 | 21 | 22 | 24 | 23 | 20 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 15 | SSW 14 | NW 8 | SSW 16 | NW 7 | NW 7 | NNW 7 | WNW 8 | WNW 8 | WNW 10 | NW 9 | WNW 9 | WNW 9 | NW 9 | WNW 8 | NW 11 | NW 11 | WNW 8 | WNW 11 | WNW 11 |
23 | 21 | 21 | 112 | 24 | 64 | 39 | 9 | 41 | 38 | 10 | 79 | 68 | 68 | 77 | 41 | 96 | 90 | 28 | 138 | 130 | |
Swell 2 Height (m) Direction Period (s) | — | — | — | SSW 15 | — | SSW 15 | WNW 9 | SSW 14 | NW 6 | NW 5 | SW 13 | SW 13 | SW 12 | SW 12 | NW 14 | NW 11 | S 12 | WNW 9 | WNW 11 | — | NNW 9 |
— | — | — | 22 | — | 21 | 8 | 20 | 14 | 6 | 7 | 7 | 6 | 6 | 7 | 82 | 3 | 16 | 50 | — | 8 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | W 10 | SSW 14 | — | SSW 14 | SW 13 | SW 13 | SW 13 | — | N 16 | SW 12 | WNW 5 | — | W 14 | NW 10 | — | — |
— | — | — | — | — | 2 | 20 | — | 19 | 7 | 7 | 7 | — | 5 | 6 | 9 | — | 4 | 25 | — | — | |
Wind waves Height (m) Direction Period (s) | NW 9 | NW 9 | NW 9 | — | NW 8 | — | — | WNW 8 | — | — | NW 8 | — | S 3 | — | WNW 3 | NW 5 | NW 8 | NW 6 | NW 6 | NW 6 | NNW 6 |
263 | 257 | 225 | — | 90 | — | — | 48 | — | — | 69 | — | 1 | — | 2 | 17 | 166 | 52 | 51 | 80 | 65 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 27 | 175 | 68 | 14 | 32 | 5 | 22 | 28 | 14 | 0 | 375 | 0 | 0 | 98 | 0 | 102 | 103 | 27 | 20 | 27 | 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.











