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Bicas surfForecast / Lisboa / Portugal
12 Day Weather and Surf, issued 5 am Thursday 18 Dec 2025 WETForecast update in hr min s Forecast update imminent
Bicas surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Bicas sea temperature is
16.0° C
(Which is slightly cooler than normal)Best Forecast Surf Conditions for Bicas this week:
The surf forecast for Bicas over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Dec 21) at 12PM. The primary swell is predicted to be 4.5m and 15s period with a secondary swell of 3.5m and 15s. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Bicas in the next 12 days are 5.0m 15s and forecast to arrive on Monday (Dec 22) at 12AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Tuesday (Dec 23) at 3PM.
| Wave Type | Time (WET) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 12PM (Sun 21st Dec) | 15ft (4.5m) 15s |
| Best Surf | 12PM (Sun 21st Dec) | 15ft (4.5m) 15s |
| Most Powerful | 12AM (Mon 22nd Dec) | 16ft (5.0m) 15s |
Table - best surf conditions forecast for Bicas over the next 12 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Heavy rain (total 35mm), heaviest during Thu night. Very mild (max 15°C on Thu morning, min 11°C on Sat night). Mainly fresh winds. | Days 3-6 Weather Summary Heavy rain (total 26mm), heaviest during Sun afternoon. Very mild (max 16°C on Tue morning, min 12°C on Sun morning). Mainly near gales. | ||||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 23 | 20 | 17 | 16 | 16 | 17 | 15 | 13 | 14 | 15 | 15 | 15 | 16 | 15 | 14 | 13 | 12 | 10 | 10 | 10 | 10 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 8463 | 10028 | 8756 | 6937 | 6471 | 6279 | 3406 | 1496 | 3020 | 6243 | 6228 | 10034 | 7830 | 6743 | 3480 | 1631 | 590 | 2215 | 1374 | 1493 | 1845 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- on | cross- on | cross- on | on | cross- on | on | cross- on | cross- on | on | on | on | cross- on | cross | on | on | on | on | on |
High Tide / height (m) | 1:35PM 2.87 | 1:51AM 3.07 | 2:11PM 2.90 | 2:25AM 3.12 | 2:46PM 2.92 | 3:00AM 3.15 | 3:22PM 2.91 | 3:35AM 3.15 | 3:57PM 2.90 | 4:10AM 3.13 | 4:34PM 2.86 | 4:48AM 3.10 | 5:14PM 2.82 | ||||||||
Low Tide / height (m) | 7:36PM 1.04 | 8:04AM 0.97 | 8:09PM 1.00 | 8:39AM 0.92 | 8:42PM 0.98 | 9:13AM 0.90 | 9:16PM 0.98 | 9:47AM 0.91 | 9:50PM 1.00 | 10:23AM 0.93 | 10:27PM 1.03 | 11:02AM 0.96 | 11:07PM 1.08 | ||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | Monday 22 | Tuesday 23 | Wednesday 24 | |||||||||||||||
| Sunrise | 7:48 | - | - | 7:48 | - | - | 7:48 | - | - | 7:50 | - | - | 7:50 | - | - | 7:50 | - | - | 7:50 | - | - |
| Sunset | - | 5:16 | - | - | 5:17 | - | - | 5:17 | - | - | 5:19 | - | - | 5:19 | - | - | 5:20 | - | - | 5:20 | - |
 |  |  |  |  |  |  | |  | |  |  | | | |  | | | | | | |
Rain (mm) | - | - | 28 | 1 | - | - | 1 | 3 | 2 | 2 | 6 | 4 | 1 | - | 5 | 7 | - | 1 | 2 | - | 4 |
| Temp. °C | 15 | 15 | 15 | 13 | 14 | 13 | 14 | 15 | 15 | 13 | 14 | 14 | 15 | 15 | 15 | 16 | 15 | 15 | 14 | 14 | 13 |
| Feels °C (?) | 11 | 11 | 10 | 7 | 6 | 6 | 9 | 9 | 9 | 6 | 5 | 4 | 8 | 9 | 10 | 10 | 8 | 9 | 6 | 6 | 6 |
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Bicas surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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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 12 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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