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Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 2 am Thursday 04 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
21.6° C
(Which is 1.4°C warmer than normal for this time of year)How big are the waves at Amatu today?
The current surf forecast for Amatu at 5AM is: 0.7m 13s primary swell from a Northeast direction (forecast issued at 02:00am December 04). An open ocean swell of 1.6m 9s is not directed at the surf break, a second open ocean swell of 2.0m 9s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (04 Dec) | 4ft (1.2m) | 10s |
| Afternoon (04 Dec) | 2.5ft (0.7m) | 13s |
| Evening (04 Dec) | 2.5ft (0.7m) | 13s |
Table - waves today at Amatu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 04 | Friday 05 | Saturday 06 | ||||||||||||||||||||||
| 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 | 6 PM | 9 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    | |||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 13 | 13 | 13 | 10 | 10 | 13 | 13 | 13 | 13 | 8 | 13 | 13 | 13 | 12 | 12 | 7 | 12 | 12 | 15 | 15 | 15 | 15 | 15 | 15 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 167 | 180 | 183 | 269 | 188 | 178 | 202 | 172 | 136 | 423 | 82 | 79 | 78 | 77 | 77 | 77 | 75 | 75 | 152 | 150 | 146 | 146 | 112 | 115 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | off | off | cross- off | glass | on | on | cross | cross- off | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | glass | cross- on | cross- on | cross |
High Tide / height (m) | 4:31AM 1.47 | 2:59PM 1.56 | 5:25AM 1.50 | 3:39PM 1.60 | 6:16AM 1.50 | 4:21PM 1.61 | ||||||||||||||||||
Low Tide / height (m) | 9:24PM -0.01 | 9:39AM 0.95 | 10:10PM -0.15 | 10:25AM 1.00 | 10:56PM -0.21 | 11:08AM 1.03 | ||||||||||||||||||
Thursday 04 | Friday 05 | Saturday 06 | ||||||||||||||||||||||
| Sunrise | - | - | - | 6:30 | - | - | - | - | - | - | - | 6:31 | - | - | - | - | - | - | - | 6:31 | - | - | - | - |
| Sunset | - | - | - | - | - | 4:27 | - | - | - | - | - | - | - | 4:27 | - | - | - | - | - | - | - | 4:27 | - | - |
 |  |  |  | | | |  | | | | | | | | | | | | |  | | | | |
Rain (mm) | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 |
| Temp. °C | 9 | 9 | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 10 | 12 | 12 | 10 | 8 | 8 | 8 | 7 | 8 | 12 | 13 | 13 | 13 |
| Feels °C (?) | 1 | 0 | 0 | -1 | 2 | 5 | 4 | 5 | 3 | 0 | -1 | 1 | 3 | 4 | 3 | 3 | 3 | 4 | 2 | 3 | 9 | 10 | 9 | 10 |
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Ocean Swells (m)- Wind Speed (km/h)
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