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Surf Forecasts:
Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 8 am Saturday 18 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
17.0° C
(Which is 1.2°C colder than average for this time of year)How big are the waves at Amatu today?
The current surf forecast for Amatu at 4PM is: 2.2m 15s primary swell from a South-southeast direction and 1.4m 11s secondary swell from a East-northeast direction (forecast issued at 08:00am April 18). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Apr) | 7.5ft (2.3m) | 16s |
| Afternoon (18 Apr) | 7.5ft (2.3m) | 16s |
| Evening (18 Apr) | 7.5ft (2.3m) | 15s |
Table - waves today at Amatu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 18 | Sunday 19 | Monday 20 | Tue 21 | |||||||||||||||||||||
| 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 | 0 AM | 3 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 2716 | 2716 | 2682 | 2581 | 2198 | 2324 | 2090 | 2243 | 2212 | 2313 | 2457 | 2577 | 2822 | 3231 | 2968 | 2927 | 2558 | 2191 | 1783 | 1541 | 1413 | 1174 | 1177 | 1064 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | on | on | on | on | cross- on | glass | glass | cross- off | cross- off | cross | cross | cross | cross | cross- off | cross- off | cross- off | cross | cross- on | cross- on | cross- on | on | on | cross- on |
High Tide / height (m) | 4:21AM 1.42 | 5:37PM 1.42 | 4:50AM 1.44 | 6:29PM 1.38 | 5:20AM 1.45 | 7:23PM 1.30 | ||||||||||||||||||
Low Tide / height (m) | 10:56AM -0.12 | 11:14PM 0.58 | 11:37AM -0.20 | 11:50PM 0.69 | 12:20PM -0.20 | 12:24AM 0.80 | ||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tue 21 | |||||||||||||||||||||
| Sunrise | 5:03 | - | - | - | - | - | - | - | 5:03 | - | - | - | - | - | - | - | 5:01 | - | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:13 | - | - | - | - | - | - | - | 6:14 | - | - | - | - | - | - | - | 6:15 | - | - | - |
 | |  | |  |  | | | | | | | |  | | | | | | | |  | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 15 | 17 | 18 | 18 | 17 | 16 | 16 | 15 | 15 | 18 | 19 | 19 | 17 | 16 | 16 | 15 | 15 | 17 | 18 | 18 | 17 | 16 | 16 | 16 |
| Feels °C (?) | 15 | 15 | 16 | 16 | 16 | 16 | 16 | 15 | 14 | 17 | 17 | 17 | 16 | 15 | 15 | 14 | 13 | 14 | 16 | 15 | 15 | 14 | 14 | 14 |
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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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