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:
Nagahama surfForecast / Kanagawa / Japan
48hr Weather and Surf, issued 8 pm Sunday 14 Dec 2025 JSTForecast update in hr min s Forecast update imminent
Nagahama surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Nagahama sea temperature is
18.4° C
(Which is 1.0°C colder than average for this time of year)How big are the waves at Nagahama today?
The current surf forecast for Nagahama at 3AM is: 2.0m 9s primary swell from a Southwest direction and 0.9m 6s secondary swell from a Southwest direction, 0.8m 10s secondary swell from a South-southeast direction (forecast issued at 08:00pm December 14). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Dec) | 2ft (0.6m) | 9s |
| Afternoon (15 Dec) | 1.5ft (0.4m) | 9s |
| Evening (15 Dec) | 1.5ft (0.4m) | 8s |
Table - waves today at Nagahama. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sun 14 | Monday 15 | Tuesday 16 | Wednesday 17 | |||||||||||||||||||||
| 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 | 12 PM | 3 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |   |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 10 | 9 | 9 | 9 | 10 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 5 | 5 | 5 | 4 | 4 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 684 | 1040 | 870 | 635 | 142 | 58 | 34 | 21 | 20 | 18 | 7 | 14 | 7 | 7 | 6 | 6 | 6 | 2 | 8 | 2 | 2 | 2 | 2 | 2 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- on | cross- on | cross- on | cross- off | cross- off | glass | cross- off | off | off | off | off | cross- off | cross- off | cross- off | glass | glass | glass | cross- off | cross- off | off | cross- off | cross- off | glass |
High Tide / height (m) | 1:08AM 1.09 | 12:45PM 1.30 | 2:31AM 1.17 | 1:26PM 1.34 | 3:33AM 1.26 | 2:06PM 1.38 | ||||||||||||||||||
Low Tide / height (m) | 6:52PM 0.61 | 6:31AM 0.77 | 7:48PM 0.45 | 7:38AM 0.84 | 8:35PM 0.30 | 8:35AM 0.89 | ||||||||||||||||||
Sun 14 | Monday 15 | Tuesday 16 | Wednesday 17 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 6:41 | - | - | - | - | - | - | - | 6:41 | - | - | - | - | - | - | - | 6:43 | - | - |
| Sunset | - | - | - | - | - | - | - | 4:30 | - | - | - | - | - | - | - | 4:30 | - | - | - | - | - | - | - | 4:30 |
 | | | | |  | | | | |  | |  |  | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 12 | 12 | 12 | 12 | 11 | 11 | 12 | 12 | 12 | 10 | 9 | 8 | 8 | 8 | 9 | 10 | 11 | 11 | 11 | 10 | 10 | 9 | 10 | 11 |
| Feels °C (?) | 8 | 6 | 5 | 6 | 7 | 7 | 9 | 7 | 5 | 4 | 3 | 1 | 1 | 2 | 5 | 7 | 9 | 9 | 9 | 8 | 6 | 4 | 5 | 8 |
- 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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