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 2 pm Saturday 13 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 9PM is: 1.1m 8s primary swell from a North-northwest direction and 0.9m 8s secondary swell from a East-northeast direction (forecast issued at 02:00pm December 13). An open ocean swell of 0.7m 7s is not directed at the surf break. The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | - | - |
| Afternoon (13 Dec) | 3.5ft (1.0m) | 8s |
| Evening (13 Dec) | 3.5ft (1.1m) | 8s |
Table - waves today at Yona Bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| 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 | 6 AM | 9 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 8 | 8 | 9 | 8 | 6 | 7 | 8 | 8 | 9 | 9 | 10 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 10 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 164 | 110 | 129 | 157 | 179 | 686 | 1025 | 1032 | 1333 | 1347 | 1318 | 1048 | 434 | 702 | 579 | 494 | 412 | 309 | 257 | 163 | 142 | 115 | 123 | 118 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | on | on | on | cross- on | on | cross- on | on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross- on | cross | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 2:06PM 1.49 | 2:48AM 1.24 | 2:58PM 1.51 | 4:10AM 1.27 | 3:43PM 1.53 | 5:13AM 1.32 | ||||||||||||||||||
Low Tide / height (m) | 8:46PM 0.67 | 8:29AM 0.75 | 9:49PM 0.55 | 9:31AM 0.82 | 10:40PM 0.43 | |||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 7:05 | - | - | - | - | - | - | - | 7:07 | - | - | - | - | - | - | - | 7:07 |
| Sunset | - | 5:35 | - | - | - | - | - | - | - | 5:35 | - | - | - | - | - | - | - | 5:36 | - | - | - | - | - | - |
 | |  | |  |  | |  | | |  | | | | |  | | | | | | | | | |
Rain (mm) | - | - | - | - | - | 1 | 1 | 3 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 22 | 23 | 22 | 22 | 21 | 18 | 17 | 15 | 16 | 17 | 17 | 16 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 19 |
| Feels °C (?) | 23 | 25 | 20 | 19 | 16 | 10 | 9 | 6 | 7 | 8 | 8 | 8 | 10 | 10 | 10 | 10 | 12 | 13 | 14 | 14 | 16 | 15 | 16 | 16 |
- 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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