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.
Surf Forecasts:
Lighthouse surfForecast / Sligo / Ireland
48hr Weather and Surf, issued 5 am Wednesday 17 Dec 2025 ISTForecast update in hr min s Forecast update imminent
Lighthouse surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Lighthouse sea temperature is
10.0° C
(Which is normal for this time of year)How big are the waves at Lighthouse today?
The current surf forecast for Lighthouse at 8AM is: 2.5m 13s primary swell from a West direction and 1.2m 5s secondary swell from a South direction (forecast issued at 05:00am December 17). The wind direction is predicted to be cross-onshore.
| Time (IST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Dec) | 8ft (2.5m) | 13s |
| Afternoon (17 Dec) | 8ft (2.5m) | 13s |
| Evening (17 Dec) | 16ft (5.0m) | 17s |
Table - waves today at Lighthouse. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 17 | Thursday 18 | Friday 19 | Sat 20 | |||||||||||||||||||||
| 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 13 | 13 | 13 | 14 | 17 | 19 | 20 | 19 | 19 | 19 | 19 | 18 | 18 | 17 | 17 | 16 | 16 | 16 | 16 | 15 | 14 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 2117 | 2039 | 2008 | 1958 | 2107 | 4646 | 15639 | 32743 | 36101 | 32883 | 29563 | 27358 | 26672 | 23138 | 20821 | 22048 | 21841 | 23162 | 22465 | 19797 | 15741 | 10325 | 6816 | 4360 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross- on | cross | cross- on | cross- on | cross | cross- on | cross- on | cross | cross- off | cross- off | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross | cross- off | cross- off |
High Tide / height (m) | 4:06PM 2.81 | 4:33AM 3.02 | 4:46PM 2.87 | 5:09AM 3.14 | 5:23PM 2.92 | |||||||||||||||||||
Low Tide / height (m) | 9:59AM 0.83 | 10:10PM 0.64 | 10:38AM 0.70 | 10:46PM 0.56 | 11:15AM 0.60 | 11:21PM 0.50 | ||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | Sat 20 | |||||||||||||||||||||
| Sunrise | - | - | 8:49 | - | - | - | - | - | - | - | 8:49 | - | - | - | - | - | - | - | 8:51 | - | - | - | - | - |
| Sunset | - | - | - | - | 4:09 | - | - | - | - | - | - | - | 4:09 | - | - | - | - | - | - | - | 4:09 | - | - | - |
 | |  |  | |  |  | |  | | |  |  |  | | | | | |  | | | | | |
Rain (mm) | 4 | 2 | 2 | - | - | - | - | 2 | 1 | - | - | 1 | 6 | - | - | 1 | 1 | 1 | - | - | - | - | - | - |
| Temp. °C | 8 | 10 | 12 | 11 | 10 | 8 | 8 | 8 | 7 | 7 | 6 | 8 | 5 | 6 | 7 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 8 | 8 |
| Feels °C (?) | -3 | 3 | 7 | 6 | 4 | 3 | 2 | 1 | -1 | 1 | 0 | -1 | -1 | -2 | -3 | -2 | -2 | -2 | 0 | 0 | 2 | 3 | 0 | -1 |
- 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 Lighthouse 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.
Nearest