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Surf Forecasts:
Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 8 pm Tuesday 21 Apr 2026 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
19.1° C
(Which is slightly warmer than usual)How big are the waves at Amatu today?
The current surf forecast for Amatu at 2AM is: 1.9m 10s primary swell from a East direction and 0.4m 14s secondary swell from a Northeast direction (forecast issued at 08:00pm April 21). An open ocean swell of 0.3m 7s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 Apr) | 5ft (1.5m) | 10s |
| Afternoon (22 Apr) | 4.5ft (1.3m) | 10s |
| Evening (22 Apr) | 4.5ft (1.3m) | 10s |
Table - waves today at Amatu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tue 21 | Wednesday 22 | Thursday 23 | Friday 24 | |||||||||||||||||||||
| 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) (?) | 11 | 10 | 7 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 10 | 9 | 9 | 9 | 9 | 6 | 7 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 452 | 316 | 265 | 770 | 551 | 424 | 380 | 353 | 327 | 327 | 256 | 256 | 196 | 175 | 154 | 118 | 115 | 98 | 42 | 41 | 28 | 312 | 489 | 418 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross | cross | cross- on | on | cross- on | cross- on | cross- on | cross- on | cross- on | cross | cross- off | off | cross- on | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross |
High Tide / height (m) | 8:23PM 1.21 | 6:25AM 1.38 | 9:31PM 1.12 | 7:03AM 1.30 | 10:56PM 1.07 | 7:53AM 1.18 | ||||||||||||||||||
Low Tide / height (m) | 12:58AM 0.88 | 1:58PM -0.03 | 1:35AM 0.94 | 2:59PM 0.11 | 2:36AM 0.98 | |||||||||||||||||||
Tue 21 | Wednesday 22 | Thursday 23 | Friday 24 | |||||||||||||||||||||
| Sunrise | - | - | - | - | 4:58 | - | - | - | - | - | - | - | 4:58 | - | - | - | - | - | - | - | 4:56 | - | - | - |
| Sunset | 6:15 | - | - | - | - | - | - | - | 6:15 | - | - | - | - | - | - | - | 6:16 | - | - | - | - | - | - | - |
 |  | | | | |  |  | |  | | | | | |  | |  | |  | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 5 | 6 | 6 | 3 | 1 | - | - | - |
| Temp. °C | 17 | 16 | 16 | 15 | 15 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 18 | 18 | 15 | 14 | 14 | 13 | 12 | 13 | 14 | 15 | 14 |
| Feels °C (?) | 14 | 11 | 12 | 10 | 11 | 14 | 13 | 14 | 16 | 17 | 15 | 16 | 16 | 18 | 16 | 15 | 14 | 10 | 6 | 5 | 7 | 6 | 7 | 7 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
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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