- Forecast
- Maps
- Live
- Weather State
- Spot Information
Surf Forecasts:
Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 2 am Monday 20 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
17.5° C
(Which is slightly cooler than normal)How big are the waves at Amatu today?
The current surf forecast for Amatu at 9AM is: 2.5m 13s primary swell from a Southeast direction and 0.4m 10s secondary swell from a East-northeast direction (forecast issued at 02:00am April 20). The wind direction is predicted to be cross-shore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Apr) | 8ft (2.5m) | 13s |
| Afternoon (20 Apr) | 7ft (2.2m) | 13s |
| Evening (20 Apr) | 6.5ft (2.0m) | 12s |
Table - waves today at Amatu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 20 | Tuesday 21 | Wednesday 22 | ||||||||||||||||||||||
| 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) (?) | 14 | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 6 | 7 | 7 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 3143 | 2927 | 2357 | 2126 | 1862 | 1583 | 1281 | 1148 | 1047 | 990 | 969 | 930 | 571 | 725 | 480 | 631 | 310 | 291 | 620 | 482 | 176 | 144 | 189 | 211 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross | cross- on | cross- on | on | on | cross- on | cross- on | cross- on | cross- on | cross- off | cross | cross | cross | cross | cross- on | on | on | on | on | cross- on | cross- on |
High Tide / height (m) | 5:20AM 1.45 | 7:23PM 1.30 | 5:51AM 1.43 | 8:23PM 1.21 | 6:25AM 1.38 | |||||||||||||||||||
Low Tide / height (m) | 11:50PM 0.69 | 12:20PM -0.20 | 12:24AM 0.80 | 1:06PM -0.14 | 12:58AM 0.88 | 1:58PM -0.03 | ||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | ||||||||||||||||||||||
| Sunrise | - | - | 5:01 | - | - | - | - | - | - | - | 5:00 | - | - | - | - | - | - | - | 4:58 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:15 | - | - | - | - | - | - | - | 6:15 | - | - | - | - | - | - | - | 6:15 | - |
 | |  | | |  |  |  | | | | | | | | | | | | | | | |  | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 16 | 16 | 16 | 18 | 19 | 18 | 17 | 17 | 17 | 17 | 17 | 20 | 19 | 20 | 16 | 16 | 15 | 15 | 16 | 18 | 19 | 18 | 18 | 18 |
| Feels °C (?) | 16 | 16 | 15 | 16 | 17 | 15 | 16 | 15 | 15 | 14 | 14 | 17 | 17 | 17 | 12 | 11 | 10 | 10 | 12 | 14 | 15 | 16 | 17 | 18 |
- Map Icons:
Break
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.
Nearest