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.
- Forecast
- Maps
- Live
- Weather State
- Spot Information
Surf Forecasts:
Costa Nova surfForecast / Beira / Portugal
12 Day Weather and Surf, issued 11 am Saturday 13 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 Saturday (Dec 13) at 3PM. The primary swell is predicted to be 3.5m and 16s period. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Costa Nova in the next 12 days are 7.0m 17s and forecast to arrive on Friday (Dec 19) at 9AM. 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+) | 3PM (Sat 13th Dec) | 11ft (3.5m) 16s |
| Best Surf | 3PM (Sat 13th Dec) | 11ft (3.5m) 16s |
| Most Powerful | 9AM (Fri 19th Dec) | 23ft (7.0m) 17s |
Table - best surf conditions forecast for Costa Nova over the next 12 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Moderate rain (total 11mm), heaviest on Mon afternoon. Very mild (max 16°C on Sat afternoon, min 11°C on Mon morning). Winds increasing (calm on Sun afternoon, strong winds from the N by Mon night). | Days 3-6 Weather Summary Moderate rain (total 13mm), heaviest on Thu night. Very mild (max 15°C on Thu afternoon, min 10°C on Tue night). Winds decreasing (strong winds from the N on Tue morning, calm by Wed morning). | ||||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||
| 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) (?) | 17 | 16 | 14 | 13 | 13 | 14 | 13 | 13 | 16 | 16 | 14 | 14 | 13 | 13 | 12 | 21 | 19 | 17 | 17 | 16 | 14 |
Wave (?)Graph  | |||||||||||||||||||||
 kJ (?) | 11118 | 6598 | 3408 | 1915 | 1830 | 2565 | 2088 | 1872 | 4532 | 6506 | 8805 | 6337 | 3416 | 2349 | 1520 | 16796 | 15293 | 13256 | 28030 | 21188 | 11666 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | cross | cross- off | cross- off | glass | cross- off | cross- off | cross- off | cross | cross | cross | cross- off | cross- off | cross- on | cross- off | cross- off | cross | cross- off | cross | cross | cross- off |
High Tide / height (m) | 10:18AM 2.65 | 10:59PM 2.53 | 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 | ||||||||
Low Tide / height (m) | 4:11PM 1.40 | 4:28AM 1.47 | 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 | ||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | Wednesday 17 | Thursday 18 | Friday 19 | |||||||||||||||
| Sunrise | 7:48 | - | - | 7:50 | - | - | 7:50 | - | - | 7:50 | - | - | 7:52 | - | - | 7:52 | - | - | 7:52 | - | - |
| Sunset | - | 5:07 | - | - | 5:07 | - | - | 5:07 | - | - | 5:07 | - | - | 5:08 | - | - | 5:08 | - | - | 5:08 | - |
 | |  | |  |  |  |  |  |  | | | | | | | |  | | | | |
Rain (mm) | - | - | - | - | - | - | - | 6 | 5 | 2 | - | - | - | - | - | - | 1 | 10 | - | - | - |
| Temp. °C | 14 | 16 | 15 | 14 | 16 | 14 | 12 | 12 | 13 | 12 | 13 | 12 | 12 | 13 | 13 | 14 | 15 | 13 | 13 | 13 | 12 |
| Feels °C (?) | 12 | 14 | 13 | 12 | 15 | 12 | 7 | 7 | 11 | 2 | 6 | 6 | 11 | 11 | 10 | 9 | 10 | 6 | 6 | 7 | 7 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
Buy Less, Surf More This Black Friday
Surf-forecast is providing a free, all-access pass to our premium features and 12-day forecasts all weekend.
Quiksilver Teams Up With PrimaLoft® For World’s First Thermal Layering System for a Wetsuit.
Previously used in our snow jackets for mountain conditions, PrimaLoft® technology is making its debut in the surf industry. The aim is to bring mountain-grade warmth to the waves.
Vancouver Island’s Day Of Days With Reed Platenius
Surf-Forecast recently helped the 21-year-old Canadian pro surfer and adventurer score some cold water perfection at home.
Read more
Discover more articles and updates in the Greenroom.
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.
false
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.
Nearest