Surf Forecasts:
Bicas surf forecast from 13 Aug 2026:
- Best quality surf: Sunday 16 Aug, 10AM (local time) - 4.5ft (1.3m), 9s period, NW swell with glassy winds.
- Most powerful swell: Saturday 15 Aug, 7PM (local time) - 5.5ft (1.7m), 9s period, NW swell with 427 kJ wave energy.
- Next surfable swell (1★+): Sunday 16 Aug, 10AM (local time) - 4.5ft (1.3m), 9s 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 (Aug 16) at 10AM. The primary swell is predicted to be 1.3m and 9s period with a secondary swell of 0.1m and 16s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Bicas in the next 16 days are 1.7m 9s and forecast to arrive on Saturday (Aug 15) at 7PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 3s period and expected on Tuesday (Aug 18) at 7PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 10AM (Sun 16th Aug) | 4.5ft (1.3m) 9s |
| Best Surf | 10AM (Sun 16th Aug) | 4.5ft (1.3m) 9s |
| Most Powerful | 7PM (Sat 15th Aug) | 5.5ft (1.7m) 9s |
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 cards for the region.
To be straight up with you, this is a tough one. The whole outlook, from now through to the 28th of August, is a bit of a battle. There’s almost a constant onshore wind or cross-onshore wind messing up what could be decent waves. For the first week, the wind is mostly howling from the NW, which is straight onshore here. That means choppy, blown-out conditions nearly every day. We are looking at a lot of days where it’s just not worth paddling out. The water temp is around 69°F, which is pretty normal for this time of year, so no surprises there.
Thursday the 13th and Friday the 14th are write-offs. Saturday the 15th sees the swell bump up to 5-6 ft from the NW, but with a strong breeze on it, it’s just a mess. Sunday the 16th has a small window with a lighter cross-on breeze in the morning on a 5 ft NW swell, but it’s only rated as marginal. The energy is moderate.
The first real glimmer of hope comes on Monday the 17th in the morning. We get a glassy, clean morning with a light offshore SSE breeze. The swell is a modest 4 ft from the NW with a 9-second period. It’s not pumping, but it’s clean and surfable. That’s your best bet in this first stretch. Tuesday the 18th morning is similar with light winds and clean 2 ft surf, but the swell is fading.
Then we hit a bit of a quiet spell. From Wednesday the 19th through to Friday the 21st, the swell drops right off to almost nothing. Not worth a look.
The second week sees some size return, but the wind problems stick around. Saturday the 22nd has a 5 ft NW swell, but it’s getting hammered by a strong onshore wind. Monday the 24th and Tuesday the 25th see a cleaner window, especially Tuesday the 25th morning with a light offshore S wind and a clean 3 ft NW swell. That’s your second standout, but it’s still very ordinary. After that, it’s back to onshore breezes for the remainder of the period.
Honestly, if you’re surfing Bicas, you’re waiting for a light wind day. This setup, with the onshore winds and beach/reef combo, looks more interesting for kite surfing than paddle surfing right now. The best, and really the only, windows are Monday morning the 17th and Tuesday morning the 25th.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Thu afternoon, min 19°C on Thu night). Winds decreasing (strong winds from the NW on Fri afternoon, calm by Sun morning). | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Mon morning, min 20°C on Tue night). Wind will be generally light. | |||||||||||||||||||
Thu 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | ||||||||||||||
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 10 | WNW 10 | NW 9 | NW 9 | NW 8 | NW 8 | NW 9 | NW 9 | NW 9 | NW 8 | NW 8 | NW 9 | NW 9 | NW 8 | NW 8 | NW 8 | NW 8 | WNW 8 | NW 8 | WNW 10 |
Wave Graph  | ||||||||||||||||||||
 kJ | 123 | 129 | 300 | 287 | 216 | 239 | 384 | 359 | 246 | 177 | 109 | 152 | 126 | 105 | 105 | 72 | 51 | 43 | 20 | 18 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | on | on | cross-on | on | on | cross-on | glassy | on | glassy | glassy | cross-on | cross-on | cross-off | cross | cross-off | cross-off | cross-off | cross-off |
High Tide | 4:21AM3.33m | 4:37PM3.64m | 5:01AM3.30m | 5:17PM3.54m | 5:39AM3.20m | 5:56PM3.36m | 6:17AM3.07m | 6:35PM3.14m | 6:57AM2.91m | 7:17PM2.89m | 7:41AM2.74m | 8:06PM2.65m | ||||||||
Low Tide | 10:13PM0.45m | 10:21AM0.59m | 10:53PM0.50m | 11:00AM0.63m | 11:31PM0.61m | 11:39AM0.74m | 00:08AM0.79m | 12:17PM0.91m | 00:45AM0.99m | 12:59PM1.10m | 1:25AM1.20m | 1:46PM1.31m | 2:11AM1.40m | |||||||
 |  | | |  |  | | | | | | | | | | | | | | | |
 | — | — | 6:48 | — | — | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:52 | — | — | 6:54 | — | — |
 | 8:34 | — | — | 8:31 | — | — | 8:30 | — | — | 8:30 | — | — | 8:29 | — | — | 8:27 | — | — | 8:25 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 21 | 25 | 24 | 21 | 23 | 23 | 20 | 22 | 26 | 26 | 28 | 26 | 27 | 24 | 23 | 22 | 23 | 24 | 25 |
Feels °C | 24 | 19 | 23 | 20 | 19 | 21 | 19 | 17 | 24 | 25 | 25 | 29 | 25 | 27 | 25 | 24 | 24 | 22 | 23 | 25 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | WNW 10 | NW 9 | S 12 | — | S 18 | S 18 | S 17 | NW 9 | NW 8 | NW 8 | NW 9 | NW 9 | NW 8 | NW 8 | NW 8 | NW 8 | WNW 8 | NW 8 | WNW 10 |
| kJ | 123 | 129 | 162 | 3 | — | 6 | 6 | 5 | 246 | 177 | 109 | 152 | 126 | 105 | 105 | 72 | 51 | 43 | 16 | 18 |
Swell 2 Height (m) Direction Period (s) | S 13 | — | S 12 | — | — | — | — | S 16 | SW 16 | SW 16 | SW 15 | W 8 | SW 15 | SSW 16 | W 8 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | NW 7 |
| kJ | 3 | — | 3 | — | — | — | — | 5 | 10 | 10 | 9 | 5 | 9 | 26 | 5 | 23 | 21 | 20 | 20 | 14 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | SW 15 | W 9 | WNW 8 | SSW 16 | WNW 8 | W 8 | WNW 8 | WNW 8 | SSW 13 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 8 | 2 | 7 | 25 | 6 | 5 | 6 | 6 | 17 |
Wind waves Height (m) Direction Period (s) | NW 4 | NNW 5 | NW 9 | NW 9 | NW 8 | NW 8 | NW 9 | NW 9 | — | WNW 8 | — | — | — | — | — | SSW 3 | SSW 3 | SW 3 | SW 3 | SW 4 |
| kJ | 21 | 41 | 300 | 287 | 216 | 239 | 384 | 359 | — | 120 | — | — | — | — | — | 1 | 2 | 3 | 3 | 2 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 27 | 27 | 62 | 415 | 175 | 68 | 612 | 62 | 0 | 132 | 0 | 0 | 432 | 28 | 0 | 371 | 0 | 39 | 463 | 0 |
Best forecast wave conditions in Lisboa | ||||||||||||||||||||
Best forecast wave conditions in Portugal | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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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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