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 8 pm Monday 22 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
19.8° C
(Which is slightly warmer than usual)How big are the waves at Amatu today?
The current surf forecast for Amatu at 1AM is: 1.6m 8s primary swell from a East-northeast direction and 1.1m 9s secondary swell from a Southeast direction (forecast issued at 08:00pm December 22). An open ocean swell of 0.1m 6s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (23 Dec) | 3ft (0.9m) | 9s |
| Afternoon (23 Dec) | 2.5ft (0.8m) | 9s |
| Evening (23 Dec) | 3.5ft (1.0m) | 6s |
Table - waves today at Amatu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Mon 22 | Tuesday 23 | Wednesday 24 | Thursday 25 | |||||||||||||||||||||
| 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) (?) | 7 | 8 | 9 | 7 | 7 | 9 | 9 | 9 | 8 | 6 | 8 | 6 | 6 | 5 | 9 | 6 | 8 | 8 | 9 | 8 | 8 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 428 | 504 | 439 | 228 | 159 | 135 | 112 | 91 | 86 | 88 | 68 | 54 | 62 | 48 | 119 | 295 | 1159 | 1507 | 2080 | 812 | 692 | 898 | 597 | 539 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross- off | cross- off | cross- on | on | cross- off | on | on | cross- on | cross | cross- off | cross | cross | cross | cross | cross |
High Tide / height (m) | 5:05PM 1.40 | 7:36AM 1.35 | 5:43PM 1.38 | 8:09AM 1.34 | 6:23PM 1.34 | 8:41AM 1.33 | ||||||||||||||||||
Low Tide / height (m) | 12:19AM 0.03 | 12:36PM 0.92 | 12:55AM 0.08 | 1:14PM 0.90 | 1:30AM 0.16 | 1:58PM 0.87 | ||||||||||||||||||
Mon 22 | Tuesday 23 | Wednesday 24 | Thursday 25 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 6:43 | - | - | - | - | - | - | - | 6:43 | - | - | - | - | - | - | - | 6:45 | - | - |
| Sunset | - | - | - | - | - | - | - | 4:30 | - | - | - | - | - | - | - | 4:31 | - | - | - | - | - | - | - | 4:31 |
 | |  | | |  |  | | | | | | |  | |  |  |  | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | 2 | 3 | 6 | 24 | 6 | 6 | - | - | - | - | - |
| Temp. °C | 9 | 9 | 9 | 8 | 7 | 8 | 10 | 10 | 11 | 10 | 10 | 11 | 11 | 8 | 11 | 14 | 16 | 13 | 14 | 14 | 14 | 16 | 18 | 17 |
| Feels °C (?) | 1 | 2 | 3 | 2 | 1 | 2 | 4 | 5 | 8 | 6 | 7 | 9 | 9 | 5 | 9 | 10 | 11 | 11 | 13 | 13 | 12 | 13 | 14 | 13 |
- 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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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Amatu 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.
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