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:
Castles surfForecast / Okinawa / Japan
48hr Weather and Surf, issued 2 am Saturday 13 Dec 2025 JSTForecast update in hr min s Forecast update imminent
Castles surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Castles sea temperature is
24.8° C
(Which is slightly warmer than usual)How big are the waves at Castles today?
The current surf forecast for Castles at 8AM is: 1.4m 8s primary swell from a East direction (forecast issued at 02:00am December 13). An open ocean swell of 0.8m 9s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | 4.5ft (1.3m) | 8s |
| Afternoon (13 Dec) | 3.5ft (1.0m) | 8s |
| Evening (13 Dec) | 2.5ft (0.8m) | 9s |
Table - waves today at Castles. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 13 | Sunday 14 | Monday 15 | ||||||||||||||||||||||
| 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 | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    | |||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 13 | 9 | 11 | 11 | 11 | 11 | 10 | 11 | 11 | 11 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 346 | 310 | 270 | 206 | 203 | 120 | 106 | 101 | 99 | 96 | 127 | 74 | 108 | 58 | 57 | 82 | 82 | 119 | 86 | 86 | 80 | 58 | 61 | 86 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross- off | cross | cross- off | off | off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross | cross |
High Tide / height (m) | 1:17AM 1.41 | 2:01PM 1.56 | 2:46AM 1.37 | 2:46PM 1.59 | 4:04AM 1.39 | 3:28PM 1.64 | ||||||||||||||||||
Low Tide / height (m) | 7:25AM 0.72 | 8:32PM 0.71 | 8:25AM 0.83 | 9:33PM 0.57 | 9:22AM 0.90 | |||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | ||||||||||||||||||||||
| Sunrise | - | - | - | 7:05 | - | - | - | - | - | - | - | 7:07 | - | - | - | - | - | - | - | 7:07 | - | - | - | - |
| Sunset | - | - | - | - | - | 5:38 | - | - | - | - | - | - | - | 5:38 | - | - | - | - | - | - | - | 5:38 | - | - |
 | |  |  | | | | |  |  | |  |  | | | | | | | |  |  | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | 1 | 1 | 3 | 1 | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 22 | 22 | 21 | 21 | 22 | 22 | 22 | 22 | 21 | 20 | 18 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 19 | 19 | 19 | 19 |
| Feels °C (?) | 20 | 21 | 20 | 21 | 24 | 23 | 20 | 20 | 17 | 14 | 10 | 8 | 9 | 9 | 9 | 10 | 11 | 11 | 10 | 11 | 14 | 14 | 14 | 14 |
- 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 Castles 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