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:
Yona Bay surfForecast / Okinawa / Japan
48hr Weather and Surf, issued 8 am Sunday 14 Dec 2025 JSTForecast update in hr min s Forecast update imminent
Yona Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Yona Bay sea temperature is
24.2° C
(Which is normal for this time of year)How big are the waves at Yona Bay today?
The current surf forecast for Yona Bay at 11AM is: 3.0m 9s primary swell from a North-northwest direction and 0.7m 9s secondary swell from a East-northeast direction (forecast issued at 08:00am December 14). An open ocean swell of 0.4m 8s is not directed at the surf break. The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (14 Dec) | 10ft (3.0m) | 8s |
| Afternoon (14 Dec) | 10ft (3.0m) | 10s |
| Evening (14 Dec) | 8ft (2.5m) | 10s |
Table - waves today at Yona Bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sunday 14 | Monday 15 | Tuesday 16 | Wed 17 | |||||||||||||||||||||
| 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 | 3 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 8 | 8 | 9 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 10 | 9 | 9 | 9 | 10 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 770 | 1108 | 1447 | 1484 | 1374 | 1135 | 917 | 781 | 651 | 530 | 235 | 358 | 238 | 212 | 127 | 102 | 90 | 92 | 111 | 87 | 111 | 88 | 90 | 88 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | glass |
High Tide / height (m) | 2:58PM 1.51 | 4:10AM 1.27 | 3:43PM 1.53 | 5:13AM 1.32 | 4:22PM 1.56 | |||||||||||||||||||
Low Tide / height (m) | 8:29AM 0.75 | 9:49PM 0.55 | 9:31AM 0.82 | 10:40PM 0.43 | 10:25AM 0.87 | 11:22PM 0.33 | ||||||||||||||||||
Sunday 14 | Monday 15 | Tuesday 16 | Wed 17 | |||||||||||||||||||||
| Sunrise | - | 7:05 | - | - | - | - | - | - | - | 7:07 | - | - | - | - | - | - | - | 7:07 | - | - | - | - | - | - |
| Sunset | - | - | - | 5:35 | - | - | - | - | - | - | - | 5:36 | - | - | - | - | - | - | - | 5:36 | - | - | - | - |
 |  |  | |  | |  |  | |  | | | | | | | |  | | | | | | | |
Rain (mm) | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 18 | 18 | 17 | 16 | 17 | 16 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 18 | 19 | 18 | 19 | 19 | 19 | 19 | 20 | 19 | 20 |
| Feels °C (?) | 10 | 10 | 9 | 8 | 8 | 9 | 10 | 10 | 10 | 10 | 12 | 13 | 14 | 14 | 15 | 16 | 16 | 16 | 16 | 16 | 17 | 18 | 17 | 19 |
- Map Icons:
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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