Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 2 pm Thursday 25 Dec 2025 JSTForecast update in hr min s Forecast update imminent
Amatu surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Amatu sea temperature is
19.3° C
(Which is slightly warmer than usual)How big are the waves at Amatu today?
The current surf forecast for Amatu at 7PM is: 3.0m 8s primary swell from a South-southwest direction and 2.2m 8s secondary swell from a South direction, 0.8m 14s secondary swell from a East direction (forecast issued at 02:00pm December 25). The wind direction is predicted to be cross-offshore and the swell rating is 11.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (25 Dec) | - | - |
| Afternoon (25 Dec) | 7.5ft (2.3m) | 8s |
| Evening (25 Dec) | 8ft (2.5m) | 8s |
Table - waves today at Amatu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 25 | Friday 26 | Saturday 27 | Sunday 28 | |||||||||||||||||||||
| 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 | 8 | 8 | 8 | 8 | 9 | 9 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 14 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 509 | 715 | 1134 | 1048 | 1043 | 1121 | 1901 | 931 | 395 | 400 | 336 | 417 | 400 | 407 | 487 | 425 | 336 | 326 | 322 | 299 | 239 | 239 | 243 | 247 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross | cross | cross- off | glass | cross | cross | cross- off | off | off | off | cross- off | cross- off | cross- off | cross- off | cross- off | off | glass | cross | cross- off | off | off | off | off |
High Tide / height (m) | 7:08PM 1.28 | 9:13AM 1.32 | 8:02PM 1.20 | 9:47AM 1.30 | 9:14PM 1.10 | |||||||||||||||||||
Low Tide / height (m) | 1:58PM 0.87 | 2:07AM 0.27 | 2:49PM 0.83 | 2:47AM 0.41 | 3:54PM 0.75 | 3:32AM 0.57 | ||||||||||||||||||
Thursday 25 | Friday 26 | Saturday 27 | Sunday 28 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 6:45 | - | - | - | - | - | - | - | 6:45 | - | - | - | - | - | - | - | 6:46 |
| Sunset | - | 4:31 | - | - | - | - | - | - | - | 4:32 | - | - | - | - | - | - | - | 4:32 | - | - | - | - | - | - |
 |  |  |  | |  | | |  | | | | | | | | | | | | | | |  | |
Rain (mm) | - | 2 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 18 | 17 | 15 | 14 | 12 | 12 | 9 | 9 | 9 | 8 | 6 | 4 | 3 | 2 | 3 | 4 | 5 | 6 | 6 | 6 | 5 | 5 | 5 | 6 |
| Feels °C (?) | 17 | 15 | 13 | 11 | 12 | 2 | -3 | -1 | 0 | 0 | -3 | -3 | -4 | -5 | -3 | -2 | 1 | 3 | 2 | 2 | 1 | -1 | 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)
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