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Surf Forecasts:
Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 2 am 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
18.6° C
(Which is normal for this time of year)How big are the waves at Amatu today?
The current surf forecast for Amatu at 6AM is: 2.0m 11s primary swell from a Southeast direction and 0.1m 13s secondary swell from a Northeast direction, 1.2m 5s secondary swell from a South direction (forecast issued at 02:00am April 21). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Apr) | 5ft (1.6m) | 11s |
| Afternoon (21 Apr) | 4.5ft (1.4m) | 11s |
| Evening (21 Apr) | 4ft (1.2m) | 10s |
Table - waves today at Amatu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 21 | Wednesday 22 | Thursday 23 | ||||||||||||||||||||||
| 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) (?) | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1111 | 1141 | 969 | 617 | 571 | 469 | 619 | 316 | 310 | 706 | 469 | 424 | 331 | 286 | 302 | 302 | 261 | 200 | 196 | 145 | 129 | 94 | 115 | 90 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | cross- on | cross- on | cross- off | cross | cross | cross | cross- on | cross- on | on | on | cross- on | cross- on | cross- on | cross- on | cross | cross | glass | cross- on | cross | cross- on | cross- on | cross- off |
High Tide / height (m) | 5:51AM 1.43 | 8:23PM 1.21 | 6:25AM 1.38 | 9:31PM 1.12 | 7:03AM 1.30 | |||||||||||||||||||
Low Tide / height (m) | 12:24AM 0.80 | 1:06PM -0.14 | 12:58AM 0.88 | 1:58PM -0.03 | 1:35AM 0.94 | 2:59PM 0.11 | ||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | ||||||||||||||||||||||
| Sunrise | - | - | 5:00 | - | - | - | - | - | - | - | 4:58 | - | - | - | - | - | - | - | 4:58 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:15 | - | - | - | - | - | - | - | 6:15 | - | - | - | - | - | - | - | 6:16 | - |
 |  |  | | |  | | | |  | | |  | | | | | | | | |  | |  | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 3 | 7 |
| Temp. °C | 17 | 17 | 18 | 20 | 20 | 17 | 16 | 16 | 15 | 15 | 16 | 18 | 18 | 18 | 17 | 17 | 17 | 16 | 16 | 18 | 17 | 13 | 12 | 13 |
| Feels °C (?) | 15 | 14 | 15 | 16 | 19 | 12 | 11 | 10 | 10 | 11 | 13 | 14 | 14 | 14 | 15 | 16 | 16 | 15 | 16 | 18 | 14 | 11 | 11 | 11 |
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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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