
Surf Forecasts:
Bicas surf forecast from 13 Sep 2026:
- Best quality surf: Saturday 19 Sep, 10AM (local time) - 5ft (1.5m), 14s period, NW swell with cross-offshore winds.
- Most powerful swell: Saturday 19 Sep, 4AM (local time) - 5ft (1.6m), 15s period, NW swell with 1,025 kJ wave energy.
- Next surfable swell (1★+): Sunday 13 Sep, 10PM (local time) - 3ft (0.9m), 12s 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 Sunday (Sep 13) at 10PM. The primary swell is predicted to be 0.9m and 12s period with a secondary swell of 0.1m and 11s. Another secondary swell of 0.5m and 3s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Bicas in the next 16 days are 1.6m 15s and forecast to arrive on Saturday (Sep 19) at 4AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.2m 4s period and expected on Monday (Sep 14) at 10AM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10PM (Sun 13th Sep) | 3ft (0.9m) 12s |
| Best Surf | 10AM (Sat 19th Sep) | 5ft (1.5m) 14s |
| Most Powerful | 4AM (Sat 19th Sep) | 5ft (1.6m) 15s |
Table - best surf conditions forecast for Bicas over the next 16 days.
The Lowdown
Alright, let me tell you how it’s looking for Bicas. It’s a reef break that rarely breaks, so we’re not exactly spoiled for choice here, but there’s a couple of windows worth a look.
Right off the bat, there’s almost nothing for the first few days. Sunday the 13th and Monday the 14th have tiny little knee-high waves, but the real killer is the wind – it’s either glassy with hardly any swell, or it’s cross-on and messy. Tuesday the 15th through the following Monday are mostly a write-off with onshore winds and poor conditions. There’s a bit of a gap there with no real recommendations.
Then, finally, things turn around on Saturday the 19th. That morning is a proper standout. You’ve got a clean 5ft NW groundswell with a long period of 14 seconds, and the wind is light and cross-off from the ENE. That’s going to make for some well-shaped, powerful lines on the reef. The combined wave energy is strong at 845, so there’s plenty of push behind it. Just a heads up, this one is for advanced surfers only – that size and power on a reef is no joke.
Sunday the 20th morning is also good, with a clean 4ft NW swell, still a nice 12-second period, and light cross-off winds. It’s a notch down in size but still a fun option. The water temp is sitting at 67°F, which is about 3°F cooler than average for this time of year – a little nippy, so bring a thicker suit.
Monday the 22nd and Wednesday the 23rd mornings both offer clean, glassy conditions with 3ft NW swells and light offshore or glassy wind. These are smaller, but clean windows if you’re chasing a longboard or a fish.
After that, it fades back into tiny, weak surf through the end of the period. The swell energy drops right off, with values in the 20s and 30s, and the period gets short and choppy.
So, if you’re keen, aim for Saturday the 19th morning – that’s your best bet. It’s a rare break that only works when everything lines up, and for that one session, it does.
Rusty
Short Range ForecastMostly dry. Warm (max 27°C on Sun afternoon, min 18°C on Tue night). Winds increasing (calm on Sun night, fresh winds from the NNW by Tue night). | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Fri afternoon, min 18°C on Wed morning). Winds decreasing (strong winds from the NW on Wed afternoon, light winds from the NNE by Fri night). | ||||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | |||||||||||||||
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 13 | NW 12 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | NW 8 | NW 7 | NW 9 | NW 9 | NW 10 | NW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NW 16 | NW 14 | NW 13 | NW 13 |
Wave Graph | |||||||||||||||||||||
63 | 151 | 246 | 97 | 75 | 35 | 39 | 135 | 159 | 460 | 577 | 757 | 611 | 520 | 496 | 335 | 255 | 627 | 837 | 618 | 411 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | glassy | cross-off | cross-on | on | on | on | cross-on | on | on | cross-on | cross-on | on | cross-on | cross-on | on | cross-on | cross-off | cross-on | cross-off |
High Tide | 4:47PM3.44m | 5:05AM3.25m | 5:21PM3.26m | 5:38AM3.12m | 5:56PM3.04m | 6:13AM2.96m | 6:33PM2.80m | 6:52AM2.77m | 7:18PM2.56m | 7:41AM2.59m | 8:20PM2.36m | 8:55AM2.46m | 9:58PM2.27m | ||||||||
Low Tide | 10:32AM0.60m | 10:55PM0.65m | 11:07AM0.72m | 11:27PM0.82m | 11:42AM0.88m | 11:58PM1.01m | 12:18PM1.08m | 00:32AM1.22m | 1:00PM1.28m | 1:12AM1.42m | 1:57PM1.48m | 2:13AM1.61m | 3:31PM1.59m | 3:59AM1.69m | |||||||
7:16 | — | — | 7:16 | — | — | 7:16 | — | — | 7:18 | — | — | 7:18 | — | — | 7:20 | — | — | 7:20 | — | — | |
— | 7:49 | — | — | 7:46 | — | — | 7:45 | — | — | 7:44 | — | — | 7:42 | — | — | 7:40 | — | — | 7:38 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 27 | 24 | 27 | 27 | 25 | 24 | 20 | 20 | 21 | 19 | 24 | 25 | 20 | 25 | 26 | 21 | 26 | 26 | 27 |
Feels °C | 25 | 24 | 26 | 23 | 24 | 25 | 22 | 20 | 18 | 15 | 15 | 14 | 20 | 19 | 15 | 22 | 21 | 18 | 24 | 22 | 26 |
Swell 1 Height (m) Direction Period (s) | WNW 9 | NW 12 | NW 11 | NW 11 | NW 11 | WNW 9 | NW 10 | WNW 12 | WNW 10 | WNW 10 | S 12 | S 12 | NW 10 | S 12 | NW 10 | NW 9 | NW 14 | NW 16 | NW 14 | NW 13 | NW 13 |
46 | 151 | 246 | 97 | 75 | 30 | 24 | 14 | 43 | 92 | 3 | 3 | 611 | 3 | 496 | 335 | 30 | 627 | 837 | 618 | 411 | |
Swell 2 Height (m) Direction Period (s) | NW 10 | W 9 | S 11 | WNW 9 | WNW 9 | NW 10 | NW 13 | S 13 | — | S 13 | — | S 12 | S 12 | S 16 | S 16 | S 15 | NW 19 | NW 9 | SW 14 | SW 13 | S 13 |
49 | 41 | 2 | 48 | 46 | 35 | 6 | 4 | — | 3 | — | 3 | 3 | 5 | 5 | 4 | 14 | 172 | 8 | 7 | 3 | |
Swell 3 Height (m) Direction Period (s) | NW 13 | NW 8 | — | S 11 | — | NW 3 | — | — | — | — | — | S 12 | S 18 | — | S 11 | NW 16 | SW 14 | SW 14 | — | — | S 10 |
63 | 17 | — | 2 | — | 2 | — | — | — | — | — | 3 | 6 | — | 2 | 10 | 8 | 8 | — | — | 2 | |
Wind waves Height (m) Direction Period (s) | — | WNW 9 | WNW 4 | S 4 | — | NW 4 | WNW 8 | NW 8 | NW 7 | NW 9 | NW 9 | NW 10 | — | NW 10 | — | — | NW 9 | — | — | — | — |
— | 44 | 5 | 2 | — | 6 | 39 | 135 | 159 | 460 | 577 | 757 | — | 520 | — | — | 255 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 129 | 0 | 0 | 27 | 20 | 28 | 606 | 82 | 488 | 643 | 68 | 5 | 598 | 62 | 14 | 163 | 5 | 0 | 31 | 0 |
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.










