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Surf Forecasts:
Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 8 pm Monday 08 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
20.2° C
(Which is normal for this time of year)How big are the waves at Amatu today?
The current surf forecast for Amatu at 10PM is: 1.2m 7s primary swell from a Southwest direction and 0.4m 10s secondary swell from a Southeast direction (forecast issued at 08:00pm December 08). An open ocean swell of 1.9m 7s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (08 Dec) | - | - |
| Afternoon (08 Dec) | - | - |
| Evening (08 Dec) | 1.5ft (0.4m) | 10s |
Table - waves today at Amatu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Mon 08 | Tuesday 09 | Wednesday 10 | Thursday 11 | |||||||||||||||||||||
| 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 | 10 | 6 | 9 | 6 | 7 | 6 | 6 | 8 | 6 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 6 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 23 | 23 | 58 | 22 | 202 | 208 | 152 | 98 | 41 | 109 | 72 | 83 | 81 | 98 | 141 | 138 | 146 | 108 | 121 | 140 | 111 | 105 | 94 | 136 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | off | off | cross- off | glass | glass | off | off | off | off | off | cross- off | cross | cross |
High Tide / height (m) | 5:49PM 1.52 | 8:36AM 1.35 | 6:37PM 1.42 | 9:19AM 1.31 | 7:30PM 1.29 | 10:00AM 1.29 | ||||||||||||||||||
Low Tide / height (m) | 1:14AM 0.03 | 1:21PM 1.01 | 1:59AM 0.19 | 2:18PM 0.98 | 2:46AM 0.35 | |||||||||||||||||||
Mon 08 | Tuesday 09 | Wednesday 10 | Thursday 11 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 6:35 | - | - | - | - | - | - | - | 6:35 | - | - | - | - | - | - | - | 6:35 | - | - |
| Sunset | - | - | - | - | - | - | - | 4:27 | - | - | - | - | - | - | - | 4:27 | - | - | - | - | - | - | - | 4:27 |
 | | | | |  | | | |  |  | | |  | | | | | | | | | |  | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 16 | 15 | 12 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 10 | 12 | 13 | 12 | 12 | 11 | 11 | 10 | 11 | 14 | 15 |
| Feels °C (?) | 9 | 11 | 6 | 5 | 4 | 4 | 4 | 4 | 5 | 6 | 7 | 6 | 5 | 6 | 10 | 11 | 10 | 10 | 9 | 9 | 7 | 9 | 8 | 8 |
- 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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