
Surf Forecasts:
Bicas surf forecast from 10 Sep 2026:
- Best quality surf: Sunday 13 Sep, 1PM (local time) - 2.5ft (0.8m), 13s period, NW swell with cross-offshore winds.
- Most powerful swell: Wednesday 16 Sep, 10PM (local time) - 6ft (1.8m), 10s period, NW swell with 573 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 4AM (local time) - 2ft (0.6m), 7s 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 7s period with a secondary swell of 0.2m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Bicas in the next 16 days are 1.8m 10s and forecast to arrive on Wednesday (Sep 16) at 10PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 3s period and expected on Monday (Sep 14) at 1PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 4AM (Sat 12th Sep) | 2ft (0.6m) 7s |
| Best Surf | 1PM (Sun 13th Sep) | 2.5ft (0.8m) 13s |
| Most Powerful | 10PM (Wed 16th Sep) | 6ft (1.8m) 10s |
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 offer for Bicas over the next couple of weeks. I’ll be straight with you – it’s a grim stretch for most of it, but there’s a light at the end of the tunnel if you’re patient.
Bicas is a reef break that’s rarely breaking, so we’re already up against it. The whole first week is a write-off. Thursday the 10th kicks off with poor surf conditions, a messy 4 ft NW swell with a short 8-second period, and a cross-on wind. It just gets worse from there. We’ve got a solid gap of nothing worthwhile until we hit the morning of Saturday the 12th. That morning offers a tiny 2 ft NW swell, but it’s glassy. The combined energy is weak at 79, and the waves are just ordinary. Not worth paddling out for.
The morning of Sunday the 13th sees a bit more energy, with a 1 ft NW swell but a long 13-second period pushing the combined energy to 153. The wind is light offshore from the SE, so it’s clean. Still, the size is tiny, and the break is rarely breaking to begin with. Monday the 14th morning is similar – glassy conditions on a 2 ft NW swell (155 energy) – but it’s still just surfable, not good.
The middle of the week gets bigger but uglier. Wednesday the 16th morning has a 5 ft NW swell, but it’s a lumpy, cross-onshore mess with a fresh breeze. The energy is up to 386, but the quality is poor. This trend continues into Thursday the 17th with a 5 ft NW swell, again poor conditions. Honestly, this stretch looks more interesting for kite surfing than paddle surfing.
Finally, we get a window. Friday morning the 18th is the standout for the first half of the outlook. The wind goes glassy, and we’ve got a 4 ft NW swell with a 10-second period, delivering 211 energy. The report says “expect good surf conditions,” and with that clean, glassy surface, this is your best bet for a proper session. It’s still a rarely-breaking reef, so don’t expect a circus, but if it’s on, it’ll be clean.
We then go back into a long, dry spell of poor conditions and tiny swell through the 19th, 20th, 21st, and 22nd. Nothing worth chasing.
The real prize, and I mean the one to circle on your calendar, is Friday the 25th of September. The morning shows a 4 ft NW swell with a very long 16-second period, cranking the combined energy up to 872 – that’s strong wave energy. The wind is calm, glassy. The forecast says “expect very good surf conditions.” This is a long-range call, so it’s promising but not locked in yet. The long period means it’ll be a proper groundswell, which for a reef break like Bicas is a beautiful thing. It’ll be a bit more powerful and the sets will have some space between them. The afternoon bumps up to 7 ft from the NW, but that’s a bit too big for the average punter, and the wind goes cross-on, making it choppy. The morning session is the one.
The water temp is sitting at 69°F, which is spot on average for this time of year.
So, to sum it up: don’t bother with anything until the 18th morning for a clean, small wave. The big one to watch is Friday the 25th morning – that’s the real standout. Be patient.
Rusty.
Short Range ForecastMostly dry. Warm (max 29°C on Sat afternoon, min 18°C on Thu night). Winds decreasing (fresh winds from the NNW on Thu afternoon, calm by Sat night). | Days 4-6 Weather SummaryMostly dry. Warm (max 28°C on Sun afternoon, min 17°C on Tue night). Winds increasing (calm on Sun night, fresh winds from the NW by Tue afternoon). | ||||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | |||||||||||||||
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 8 | NW 11 | NW 6 | NNW 10 | NW 6 | NW 6 | NW 7 | WNW 9 | WNW 9 | NW 13 | NW 12 | NW 11 | NW 10 | NW 11 | NW 10 | NW 10 | NW 5 | NW 7 | NW 8 | NW 9 | NW 10 |
Wave Graph | |||||||||||||||||||||
135 | 319 | 83 | 37 | 24 | 27 | 38 | 49 | 71 | 63 | 214 | 246 | 108 | 72 | 49 | 33 | 47 | 194 | 256 | 449 | 489 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross | on | glassy | glassy | on | glassy | off | cross-on | glassy | glassy | cross-on | on | on | on | cross-on | cross-on | on | cross-on |
High Tide | 2:55PM3.55m | 3:20AM3.33m | 3:34PM3.60m | 3:56AM3.36m | 4:11PM3.56m | 4:31AM3.33m | 4:47PM3.44m | 5:05AM3.25m | 5:21PM3.26m | 5:38AM3.12m | 5:56PM3.04m | 6:13AM2.96m | 6:33PM2.80m | ||||||||
Low Tide | 9:13PM0.49m | 9:21AM0.58m | 9:49PM0.47m | 9:57AM0.55m | 10:23PM0.53m | 10:32AM0.60m | 10:55PM0.65m | 11:07AM0.72m | 11:27PM0.82m | 11:42AM0.88m | 11:58PM1.01m | 12:18PM1.08m | 00:32AM1.22m | ||||||||
7:13 | — | — | 7:13 | — | — | 7:15 | — | — | 7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:18 | — | — | |
— | 7:52 | — | — | 7:52 | — | — | 7:50 | — | — | 7:49 | — | — | 7:46 | — | — | 7:45 | — | — | 7:44 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 25 | 20 | 22 | 26 | 24 | 25 | 29 | 27 | 27 | 28 | 28 | 25 | 28 | 27 | 27 | 26 | 20 | 23 | 24 | 19 |
Feels °C | 21 | 19 | 16 | 20 | 23 | 21 | 24 | 25 | 26 | 26 | 25 | 27 | 25 | 24 | 24 | 23 | 21 | 17 | 19 | 17 | 14 |
Swell 1 Height (m) Direction Period (s) | NW 8 | S 16 | NW 10 | NW 6 | NNW 10 | NW 6 | NW 7 | WNW 9 | WNW 9 | W 9 | NW 12 | NW 11 | NW 10 | NW 11 | NW 10 | NW 10 | WNW 12 | WNW 11 | WNW 10 | S 12 | NW 10 |
135 | 5 | 48 | 34 | 18 | 27 | 38 | 49 | 71 | 41 | 214 | 246 | 108 | 72 | 49 | 33 | 14 | 46 | 127 | 3 | 489 | |
Swell 2 Height (m) Direction Period (s) | W 8 | W 11 | W 7 | NNW 10 | W 7 | W 7 | WNW 10 | S 12 | NNW 8 | NW 10 | WNW 9 | — | WNW 9 | WNW 9 | WNW 9 | WNW 8 | S 13 | — | S 13 | — | NW 13 |
11 | 2 | 4 | 37 | 4 | 4 | 38 | 3 | 23 | 49 | 26 | — | 45 | 45 | 25 | 22 | 4 | — | 3 | — | 41 | |
Swell 3 Height (m) Direction Period (s) | NNW 12 | — | W 10 | W 7 | W 8 | N 9 | S 13 | S 10 | NW 16 | NW 13 | S 11 | S 11 | S 11 | — | S 11 | NW 12 | — | — | — | — | S 12 |
27 | — | 2 | 4 | 1 | 6 | 3 | 2 | 39 | 63 | 2 | 2 | 2 | — | 2 | 6 | — | — | — | — | 3 | |
Wind waves Height (m) Direction Period (s) | — | NW 11 | NW 6 | — | NW 6 | — | — | NW 7 | — | — | — | — | — | — | NW 3 | NW 4 | NW 5 | NW 7 | NW 8 | NW 9 | — |
— | 319 | 83 | — | 24 | — | — | 38 | — | — | — | — | — | — | 4 | 4 | 47 | 194 | 256 | 449 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 14 | 418 | 14 | 1 | 160 | 28 | 0 | 30 | 0 | 0 | 31 | 0 | 0 | 27 | 20 | 20 | 961 | 546 | 479 | 953 | 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.










