Surf Forecasts:
Bicas surf forecast from 22 Aug 2026:
- Best quality surf: Sunday 23 Aug, 1AM (local time) - 4.5ft (1.4m), 14s period, WNW swell with cross-offshore winds.
- Most powerful swell: Sunday 23 Aug, 7AM (local time) - 6ft (1.9m), 12s period, W swell with 1,010 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 1AM (local time) - 4.5ft (1.4m), 14s 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 Sunday (Aug 23) at 1AM. The primary swell is predicted to be 1.4m and 14s period with a secondary swell of 0.4m and 9s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Bicas in the next 16 days are 1.9m 12s and forecast to arrive on Sunday (Aug 23) at 7AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Sunday (Aug 23) at 4PM.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 1AM (Sun 23rd Aug) | 4.5ft (1.4m) 14s |
| Best Surf | 1AM (Sun 23rd Aug) | 4.5ft (1.4m) 14s |
| Most Powerful | 7AM (Sun 23rd Aug) | 6ft (1.9m) 12s |
Table - best surf conditions forecast for Bicas over the next 16 days.
The Lowdown
Right, let’s have a look at what’s on offer for Bicas over the next couple of weeks. I’ll be straight with you – this is a tricky one. Bicas is a reef break that rarely breaks, and for the vast majority of this 16-day window, the conditions are just not playing ball.
We’re looking at a long stretch of poor surf. The first real chance of anything waves comes late on Saturday the 22nd, but it’s small at 2ft from the NNW with a cross wind and a weak energy reading of 120. That’s not going to get anyone out of bed. The following week is a write-off. Sunday the 23rd has a bit more size, 6ft from the W, but the wind is cranking at 22 mph, and the forecast is marginal at best. That trend continues through the week – a mix of bumpy cross-shore winds and choppy conditions, with the swell mostly hanging around the 3ft to 5ft mark. The water temp is about 69°, which is pretty normal for this time of year.
There’s a tiny glimmer on Tuesday morning the 25th. The swell drops to 4ft from the W, but the wind goes glassy. That’s a rare moment of clean conditions, but the wave comment says “surfable waves but very ordinary conditions,” so don’t expect much. The energy is low at 183.
Honestly, the best bet in this whole outlook is a long way off. On Sunday morning the 6th of September, we get a glassy morning with a 2ft swell from the NW. That’s tiny, but it’s a long-period groundswell at 11 seconds, and the wind is dead calm. The energy is weak at 98, but if you’re desperate for a slide and the reef is working, it’s the cleanest window we’ve got. Just keep your expectations low.
Beyond that, the rest of the period is a mix of onshore wind and small, weak swell. It’s a tough run for Bicas, and with it rarely breaking, this kind of blank run isn’t unusual for the area. Forecasts can change, but right now, there’s nothing to get excited about.
Rusty.
Short Range ForecastModerate rain (total 14mm), heaviest on Sun night. Warm (max 22°C on Mon morning, min 19°C on Sat night). Winds decreasing (fresh winds from the SSE on Sun morning, calm by Tue morning). | Days 5-7 Weather SummaryLight rain (total 9mm), mostly falling on Wed morning. Warm (max 21°C on Tue afternoon, min 18°C on Thu night). Wind will be generally light. | |||||||||||||||||||
Sat 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | ||||||||||||||
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) | NNW 10 | WNW 14 | W 11 | W 10 | WSW 9 | WSW 8 | WSW 8 | W 8 | W 7 | W 7 | W 7 | W 6 | W 6 | W 7 | WNW 8 | WNW 8 | WNW 9 | WNW 10 | NW 10 | NW 11 |
Wave Graph  | ||||||||||||||||||||
 kJ | 61 | 756 | 683 | 459 | 840 | 763 | 629 | 287 | 177 | 114 | 56 | 58 | 69 | 117 | 223 | 228 | 346 | 421 | 689 | 595 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-on | glassy | cross-on | cross | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on |
High Tide | 00:05AM2.41m | 12:28PM2.63m | 1:05AM2.55m | 1:20PM2.80m | 1:48AM2.71m | 2:01PM2.98m | 2:24AM2.87m | 2:36PM3.15m | 2:56AM3.02m | 3:08PM3.28m | 3:27AM3.13m | 3:40PM3.38m | 3:58AM3.21m | |||||||
Low Tide | 5:57PM1.51m | 6:13AM1.53m | 7:00PM1.36m | 7:08AM1.38m | 7:43PM1.19m | 7:49AM1.21m | 8:19PM1.03m | 8:23AM1.04m | 8:50PM0.88m | 8:55AM0.89m | 9:20PM0.76m | 9:26AM0.77m | 9:50PM0.67m | |||||||
 |  |  |  |  |  | |  |  |  | | | | | | | | | | | |
 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | 7:00 | — | — | 7:01 | — | — | 7:01 | — | — |
 | 8:22 | — | — | 8:20 | — | — | 8:19 | — | — | 8:16 | — | — | 8:15 | — | — | 8:15 | — | — | 8:13 | — |
mm | — | — | 2 | 1 | 8 | 3 | — | — | — | — | — | 8 | — | — | 1 | — | — | — | — | — |
Temp °C | 20 | 20 | 21 | 21 | 21 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 19 | 20 | 21 | 19 |
Feels °C | 18 | 20 | 17 | 18 | 18 | 20 | 20 | 21 | 23 | 21 | 21 | 20 | 20 | 20 | 20 | 18 | 17 | 18 | 15 | 16 |
Swell 1 Height (m) Direction Period (s) | NNW 10 | WNW 14 | W 11 | W 10 | SSW 13 | SW 13 | SW 13 | W 8 | W 7 | W 7 | W 7 | W 9 | NW 9 | W 7 | WNW 8 | WNW 8 | WNW 9 | WNW 10 | S 10 | NW 11 |
| kJ | 61 | 756 | 683 | 459 | 17 | 7 | 7 | 287 | 177 | 114 | 56 | 2 | 3 | 117 | 223 | 228 | 346 | 421 | 2 | 595 |
Swell 2 Height (m) Direction Period (s) | W 9 | NNW 9 | NNW 8 | SSW 13 | N 8 | N 8 | N 8 | SW 12 | SW 12 | SW 12 | NW 10 | SW 12 | SW 11 | SW 11 | SW 11 | SW 11 | SW 11 | S 11 | — | — |
| kJ | 39 | 32 | 7 | 17 | 1 | 1 | 1 | 6 | 6 | 6 | 4 | 5 | 5 | 5 | 5 | 5 | 4 | 2 | — | — |
Swell 3 Height (m) Direction Period (s) | SSW 14 | SSW 14 | SSW 13 | NNW 8 | — | — | — | — | — | — | SW 12 | NW 10 | W 9 | — | — | — | S 11 | — | — | — |
| kJ | 20 | 19 | 18 | 7 | — | — | — | — | — | — | 6 | 4 | 2 | — | — | — | 2 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | SSE 4 | SSW 6 | WSW 9 | WSW 8 | WSW 8 | — | — | — | — | W 6 | W 6 | — | — | — | — | — | NW 10 | N 4 |
| kJ | — | — | 28 | 165 | 840 | 763 | 629 | — | — | — | — | 58 | 69 | — | — | — | — | — | 689 | 6 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 459 | 0 | 81 | 197 | 81 | 465 | 214 | 27 | 0 | 102 | 39 | 535 | 469 | 159 | 81 | 463 | 20 | 20 | 100 | 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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