Nazare Big Wave Challenge Gets Yellow Alert, Could Run Saturday in Giant Waves
70-foot plus waves predicted for Portuguese big wave tow surfing competition.
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Costa Nova surfForecast / Beira / Portugal
12 Day Weather and Surf, issued 11 am Sunday 14 Dec 2025 WETForecast update in hr min s Forecast update imminent
Costa Nova surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Costa Nova sea temperature is
15.3° C
(Which is normal for this time of year)Best Forecast Surf Conditions for Costa Nova this week:
The surf forecast for Costa Nova over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Dec 14) at 9PM. The primary swell is predicted to be 2.5m and 14s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Costa Nova in the next 12 days are 5.5m 21s and forecast to arrive on Thursday (Dec 18) at 3PM. Winds are predicted to be cross-shore at the time the swell arrives.
| Wave Type | Time (WET) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9PM (Sun 14th Dec) | 8ft (2.5m) 14s |
| Best Surf | 12AM (Tue 16th Dec) | 10ft (3.0m) 16s |
| Most Powerful | 3PM (Thu 18th Dec) | 18ft (5.5m) 21s |
Table - best surf conditions forecast for Costa Nova over the next 12 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Heavy rain (total 25mm), heaviest during Mon afternoon. Very mild (max 15°C on Sun afternoon, min 10°C on Tue night). Winds increasing (calm on Sun afternoon, near gales from the NNW by Tue morning). | Days 3-6 Weather Summary Moderate rain (total 18mm), heaviest on Thu night. Very mild (max 14°C on Wed afternoon, min 10°C on Wed morning). Winds increasing (light winds from the N on Wed afternoon, strong winds from the N by Fri afternoon). | ||||||||||||||||||||
Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||
| 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) (?) | 13 | 13 | 14 | 13 | 13 | 16 | 14 | 14 | 14 | 13 | 13 | 12 | 23 | 21 | 18 | 17 | 16 | 15 | 14 | 14 | 13 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 1830 | 1830 | 2565 | 2035 | 1872 | 4810 | 5652 | 10156 | 5273 | 3607 | 2672 | 1483 | 20481 | 24341 | 15787 | 14880 | 12393 | 8282 | 4681 | 3544 | 1697 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | glass | cross- off | cross | cross | cross- on | cross | cross | cross- off | cross- off | cross- on | cross- off | cross- off | cross | cross- off | cross | cross | cross- off | cross | cross | cross |
High Tide / height (m) | 11:19AM 2.66 | 11:53PM 2.61 | 12:12PM 2.69 | 12:40AM 2.71 | 12:58PM 2.73 | 1:22AM 2.80 | 1:40PM 2.78 | 2:00AM 2.89 | 2:18PM 2.82 | 2:36AM 2.96 | 2:55PM 2.85 | 3:11AM 3.00 | 3:30PM 2.86 | ||||||||
Low Tide / height (m) | 5:09PM 1.38 | 5:30AM 1.42 | 5:59PM 1.33 | 6:22AM 1.34 | 6:42PM 1.26 | 7:07AM 1.24 | 7:22PM 1.18 | 7:48AM 1.16 | 8:00PM 1.11 | 8:26AM 1.08 | 8:37PM 1.06 | 9:04AM 1.02 | 9:14PM 1.03 | ||||||||
Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||
| Sunrise | 7:50 | - | - | 7:50 | - | - | 7:50 | - | - | 7:52 | - | - | 7:52 | - | - | 7:52 | - | - | 7:54 | - | - |
| Sunset | - | 5:07 | - | - | 5:07 | - | - | 5:07 | - | - | 5:08 | - | - | 5:08 | - | - | 5:08 | - | - | 5:09 | - |
 |  |  |  |  |  |  | |  |  | | | | | | | | | | | | |
Rain (mm) | - | - | - | 1 | 12 | 11 | 1 | - | - | - | - | - | - | - | 17 | 1 | - | - | - | - | - |
| Temp. °C | 14 | 15 | 14 | 12 | 12 | 12 | 13 | 13 | 13 | 12 | 14 | 13 | 13 | 14 | 13 | 13 | 12 | 12 | 11 | 12 | 13 |
| Feels °C (?) | 12 | 14 | 12 | 8 | 6 | 7 | 3 | 3 | 4 | 9 | 12 | 11 | 8 | 9 | 7 | 5 | 4 | 6 | 8 | 8 | 9 |
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Costa Nova 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 Costa Nova Surf forecast
The above surf forecast table for Costa Nova provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Costa Nova can be found by selecting the local surf guide option on the grey menu. Our Costa Nova 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 (Costa Nova) 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 Costa Nova 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.
Costa Nova is 8 km (5 miles) from the city of Ilhavo. If you plan a holiday in Beira, look for hotels and other accommodation in Ilhavo. Ilhavo has rooms for a wide range of budgets as well as car hire and transport links.
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