
Surf Forecasts:
Bicas surf forecast from 16 Sep 2026:
- Best quality surf: Saturday 19 Sep, 7AM (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), 14s period, NW swell with 970 kJ wave energy.
- Next surfable swell (1★+): Saturday 19 Sep, 7AM (local time) - 5ft (1.5m), 14s 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 19) at 7AM. The primary swell is predicted to be 1.5m and 14s period with a secondary swell of 0.1m and 14s. 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 1.6m 14s and forecast to arrive on Saturday (Sep 19) at 4AM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (WEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Sat 19th Sep) | 5ft (1.5m) 14s |
| Best Surf | 7AM (Sat 19th Sep) | 5ft (1.5m) 14s |
| Most Powerful | 4AM (Sat 19th Sep) | 5ft (1.6m) 14s |
Table - best surf conditions forecast for Bicas over the next 16 days.
The Lowdown
Alright, let’s get into it. The forecast for Bicas is a bit of a mixed bag, so bear with me.
Right off the bat, the first few days are pretty ordinary. Wednesday and Thursday are blown out by a fresh cross-onshore breeze, lumpy and messy. The swell is around 6 to 7 feet, but the wind just kills it. Not worth getting wet for anything but a masochist. The energy is moderate, sitting in the 500-600 range, but with that wind, it counts for nothing.
Friday is cleaner in the morning with a light cross-on, but the swell is dropping and it’s looking marginal. Honestly, it’s not until Saturday the 19th that things start to get interesting. We’ve got a proper groundswell coming in from the NW at 5 feet with a long 14-second period. The morning is glassy, absolutely glassy, and the energy is pumping in the 800s. This is the standout of the first week. Bicas, which rarely breaks, is going to light up. It’s an advanced reef, so you need to know what you’re doing, but the conditions will be worth it. The crowds are sometimes a factor, so get in early.
Sunday the 20th and Monday the 21st are still okay, with cross-off winds in the mornings and clean-ish waves, but the swell is backing off. It’s surfable, but nothing to write home about. The energy drops down to the 200-300 range. It’s a good time to work on your turns, but the magic is gone.
Then we hit a bit of a flat spell. Tuesday the 22nd through to the start of the following week is mostly small and onshore, with a lot of poor conditions. There’s a couple of glassy mornings with tiny 3 feet waves, but the energy is weak. It’s a real gap in the action.
Now, here’s the second standout, and it’s a long-range one, so don’t book the trip just yet. But Wednesday the 23rd of September is looking special. The morning is glassy again, and we’ve got a new WNW swell filling in at 4 feet with a 15-second period. That’s a very long period, and the energy is solid in the 800s. This is a point-break type of swell, and Bicas is a reef, so it should handle it really well. It’s going to be clean and lined up. The second week has another decent morning on Thursday the 24th with a 4 feet NW swell at 13 seconds, but the energy isn’t as strong.
After that, the window closes. The end of September and into October is a write-off. The swell fades, the wind gets messy, and the energy readings are weak. There’s a pulse of energy around the 28th September with a 5 feet NW swell and 15-second period, but it’s completely blown out by a fresh onshore. Useless.
So, the best on offer? It’s Saturday the 19th and Wednesday the 23rd. Both are glassy mornings, with solid, long-period swells from the NW and WNW. The first one is more certain being closer, the second is a promising long-range call but less sure. The rest is either marginal or just plain poor.
This is Bicas, remember – it rarely breaks. When it does, you want the conditions right. These two days are your best shots.
Stay salty.
Rusty
Short Range ForecastMostly dry. Warm (max 24°C on Thu morning, min 17°C on Tue night). Winds decreasing (strong winds from the NNW on Wed afternoon, light winds from the N by Fri morning). | Days 4-6 Weather SummaryMostly dry. Warm (max 29°C on Sun afternoon, min 20°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | |||||||||||||||
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 9 | NW 9 | NW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | NW 14 | NW 14 | NW 13 | NW 13 | NW 12 | NW 11 | NW 11 | NW 10 | NW 10 | NW 12 | NW 11 | NW 12 | WNW 16 |
Wave Graph | |||||||||||||||||||||
439 | 664 | 880 | 588 | 499 | 513 | 321 | 220 | 837 | 801 | 618 | 473 | 309 | 278 | 220 | 120 | 120 | 220 | 150 | 161 | 475 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | cross | on | cross-on | cross-on | on | cross-on | glassy | cross-on | glassy | cross-off | on | cross-off | cross-off | cross-on | cross-off | glassy | cross-on | glassy |
High Tide | 6:13AM2.96m | 6:33PM2.80m | 6:52AM2.77m | 7:18PM2.56m | 7:41AM2.59m | 8:20PM2.36m | 8:55AM2.46m | 9:58PM2.27m | 10:33AM2.45m | 11:34PM2.35m | 11:54AM2.58m | 00:35AM2.52m | 12:47PM2.77m | 1:17AM2.72m | |||||||
Low Tide | 12:18PM1.08m | 00:32AM1.22m | 1:00PM1.28m | 1:12AM1.42m | 1:57PM1.48m | 2:13AM1.61m | 3:31PM1.59m | 3:59AM1.69m | 5:21PM1.53m | 5:39AM1.59m | 6:28PM1.37m | 6:37AM1.40m | 7:11PM1.18m | ||||||||
7:18 | — | — | 7:18 | — | — | 7:20 | — | — | 7:20 | — | — | 7:22 | — | — | 7:22 | — | — | 7:22 | — | — | |
— | 7:44 | — | — | 7:42 | — | — | 7:40 | — | — | 7:38 | — | — | 7:37 | — | — | 7:36 | — | — | 7:34 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 21 | 20 | 24 | 24 | 20 | 23 | 23 | 23 | 23 | 24 | 26 | 28 | 29 | 29 | 25 | 27 | 28 | 26 | 27 | 25 |
Feels °C | 16 | 15 | 14 | 19 | 18 | 16 | 21 | 19 | 20 | 21 | 21 | 24 | 28 | 25 | 27 | 25 | 24 | 24 | 25 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | S 12 | S 12 | NW 10 | S 12 | S 16 | NW 9 | NW 14 | NW 14 | NW 14 | NW 13 | NW 13 | NW 12 | NW 11 | NW 11 | NW 10 | NW 12 | NW 12 | NW 11 | NW 12 | WNW 16 |
125 | 3 | 3 | 588 | 3 | 5 | 321 | 69 | 837 | 801 | 618 | 473 | 309 | 278 | 220 | 120 | 120 | 220 | 150 | 161 | 475 | |
Swell 2 Height (m) Direction Period (s) | S 13 | — | S 12 | S 18 | S 16 | S 11 | NW 16 | S 14 | S 14 | SW 14 | SW 13 | S 13 | S 13 | S 11 | — | NW 13 | S 4 | — | NW 4 | WNW 20 | NW 11 |
3 | — | 3 | 6 | 5 | 3 | 10 | 4 | 4 | 8 | 7 | 3 | 3 | 2 | — | 108 | 1 | — | 3 | 75 | 116 | |
Swell 3 Height (m) Direction Period (s) | — | — | S 12 | S 12 | — | S 11 | S 15 | S 11 | — | — | S 13 | S 10 | S 11 | S 13 | S 12 | S 3 | S 12 | S 12 | — | S 11 | S 13 |
— | — | 3 | 3 | — | 2 | 4 | 2 | — | — | 3 | 2 | 2 | 3 | 3 | 2 | 3 | 3 | — | 2 | 3 | |
Wind waves Height (m) Direction Period (s) | NW 9 | NW 9 | NW 10 | — | NW 10 | NW 9 | — | NW 9 | — | — | — | — | — | WNW 2 | — | — | NW 10 | NW 4 | — | — | — |
439 | 664 | 880 | — | 499 | 513 | — | 220 | — | — | — | — | — | 1 | — | — | 113 | 8 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 704 | 285 | 68 | 20 | 478 | 68 | 14 | 163 | 14 | 0 | 27 | 0 | 0 | 27 | 0 | 0 | 27 | 0 | 0 | 157 | 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.










