Surf Forecasts:
Bicas surf forecast from 7 Sep 2026:
- Best quality surf: Sunday 13 Sep, 10AM (local time) - 3ft (0.9m), 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 531 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 4AM (local time) - 2ft (0.6m), 6s period with NW 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 Saturday (Sep 12) at 4AM. The primary swell is predicted to be 0.6m and 6s period with a secondary swell of 0.2m and 8s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Bicas in the next 16 days are 1.4m 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+) | 4AM (Sat 12th Sep) | 2ft (0.6m) 6s |
| Best Surf | 10AM (Sun 13th Sep) | 3ft (0.9m) 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.
It’s a pretty quiet start for Bicas, with a bit of a wait before anything worthwhile shows up. We’re looking at a solid stretch of poor conditions through the first several days, with strong onshore winds messing things up. The first real sniff of anything decent doesn’t come until Saturday the 12th, and even then it’s small.
The standout window opens on Sunday the 13th. That morning, Bicas (reef) is looking like the pick of the period. We’ve got a clean 3 ft swell rolling in from the NNW, with a long 13-second period pushing that moderate energy (301). The wind is glassy – dead calm – so the surface will be like a mirror. This is a rare treat for a break that rarely breaks, so if you’ve got the skill for an advanced wave, this is the moment. The water temp is about average for this time of year, nothing wild.
Monday the 14th morning is similar, with glassy conditions and a 3 ft swell from the NW, 12-second period, offering up clean, surfable waves (248). Another solid option. Then on Saturday the 19th, the morning glass-off returns, with a 4 ft NW swell, 9-second period, and moderate energy (226). It’s a bit more manageable, but still only for those who know what they’re doing. The wind is light and variable, so it’ll be clean.
Outside of those windows, the afternoons are consistently blown out by strong cross-onshore and onshore winds, and the swell is often too weak or messy. The combined energy on the 17th and 18th spikes up into the 500s and 700s with 6 ft to 7 ft NW swell, but the wind is on it hard, making it a poor choice for paddle surfing – that’s kite-surfing territory if you’re into that.
There’s a long gap of poor surf from the 7th through the 11th, then a few clean windows, then more poor conditions again. It’s not a long run of great waves, but the Sunday the 13th morning is the real highlight. Don’t sleep on it.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Mon morning, min 18°C on Mon night). Winds increasing (light winds from the NNW on Sun night, strong winds from the NW by Wed afternoon). | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Fri morning, min 18°C on Wed night). Winds decreasing (fresh winds from the NW on Thu afternoon, calm by Fri night). | ||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | |||||||||||||||
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 13 | WNW 12 | WNW 11 | WNW 10 | WNW 10 | WNW 9 | NW 6 | NW 8 | NW 8 | NW 8 | NW 11 | NW 9 | NW 7 | NW 7 | NW 6 | WNW 10 | NNW 8 | WNW 9 | NW 13 | NW 13 | NW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 498 | 437 | 313 | 261 | 145 | 88 | 62 | 239 | 282 | 184 | 286 | 360 | 39 | 37 | 35 | 32 | 40 | 26 | 295 | 193 | 352 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | on | on | on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | glassy | cross-on | on | glassy | cross-on | on |
High Tide | 12:25PM2.96m | 1:07AM2.87m | 1:24PM3.20m | 1:58AM3.07m | 2:12PM3.40m | 2:41AM3.23m | 2:55PM3.55m | 3:20AM3.33m | 3:34PM3.60m | 3:56AM3.36m | 4:11PM3.56m | 4:31AM3.33m | 4:47PM3.44m | ||||||||
Low Tide | 6:08AM1.28m | 6:55PM0.98m | 7:10AM1.06m | 7:48PM0.75m | 8:00AM0.85m | 8:33PM0.58m | 8:42AM0.68m | 9:13PM0.49m | 9:21AM0.58m | 9:49PM0.47m | 9:57AM0.55m | 10:23PM0.53m | 10:32AM0.60m | 10:55PM0.65m | |||||||
 | |  | |  |  | | | | | | | | | | | | | | | | |
 | 7:09 | — | — | 7:11 | — | — | 7:11 | — | — | 7:13 | — | — | 7:13 | — | — | 7:15 | — | — | 7:16 | — | — |
 | — | 7:58 | — | — | 7:55 | — | — | 7:54 | — | — | 7:52 | — | — | 7:52 | — | — | 7:50 | — | — | 7:49 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 29 | 29 | 22 | 23 | 23 | 20 | 21 | 21 | 19 | 25 | 25 | 23 | 27 | 27 | 25 | 24 | 23 | 25 | 25 | 25 | 25 |
Feels °C | 26 | 24 | 21 | 19 | 19 | 19 | 16 | 14 | 15 | 22 | 19 | 20 | 25 | 22 | 22 | 22 | 21 | 25 | 24 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | WNW 13 | WNW 12 | WNW 11 | WNW 10 | WNW 10 | NW 9 | NW 8 | NW 12 | N 13 | NW 8 | W 8 | NW 10 | NW 7 | NNW 9 | NW 6 | NW 6 | NNW 8 | NNW 8 | NW 13 | NW 13 | NW 13 |
| kJ | 498 | 437 | 313 | 261 | 145 | 20 | 54 | 6 | 4 | 184 | 10 | 188 | 39 | 17 | 35 | 19 | 40 | 24 | 295 | 193 | 352 |
Swell 2 Height (m) Direction Period (s) | NW 9 | — | — | — | — | — | WNW 8 | — | W 13 | WNW 8 | — | W 7 | NW 10 | W 7 | WNW 8 | WNW 10 | WNW 9 | WNW 9 | S 12 | NW 8 | S 11 |
| kJ | 95 | — | — | — | — | — | 13 | — | 3 | 12 | — | 4 | 26 | 4 | 6 | 32 | 29 | 26 | 3 | 54 | 2 |
Swell 3 Height (m) Direction Period (s) | NW 10 | — | — | — | — | — | — | — | — | W 8 | — | W 10 | W 7 | W 8 | N 9 | S 13 | NW 12 | NW 4 | S 12 | S 12 | S 11 |
| kJ | 24 | — | — | — | — | — | — | — | — | 6 | — | 2 | 4 | 1 | 2 | 3 | 6 | 4 | 3 | 3 | 2 |
Wind waves Height (m) Direction Period (s) | NW 6 | NW 5 | NW 5 | NW 5 | NW 4 | WNW 9 | NW 6 | NW 8 | NW 8 | — | NW 11 | NW 9 | — | NW 7 | — | — | WNW 2 | — | — | — | — |
| kJ | 56 | 55 | 28 | 49 | 25 | 88 | 62 | 239 | 282 | — | 286 | 360 | — | 37 | — | — | 1 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 14 | 335 | 20 | 27 | 27 | 68 | 344 | 459 | 62 | 14 | 161 | 14 | 12 | 160 | 28 | 0 | 159 | 5 | 0 | 159 | 27 |
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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