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Surf Forecasts:
Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 8 pm Thursday 16 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
16.3° C
(Which is 1.9°C colder than average for this time of year)How big are the waves at Amatu today?
The current surf forecast for Amatu at 1AM is: 1.8m 16s primary swell from a South-southeast direction and 0.6m 12s secondary swell from a East-northeast direction, 2.5m 8s secondary swell from a Northeast direction (forecast issued at 08:00pm April 16). The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Apr) | 6ft (1.8m) | 15s |
| Afternoon (17 Apr) | 5ft (1.5m) | 14s |
| Evening (17 Apr) | 7ft (2.1m) | 16s |
Table - waves today at Amatu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thu 16 | Friday 17 | Saturday 18 | Sunday 19 | |||||||||||||||||||||
| 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) (?) | 15 | 9 | 15 | 16 | 15 | 15 | 15 | 14 | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1432 | 1367 | 1511 | 1531 | 1472 | 1396 | 1358 | 886 | 1652 | 2368 | 2490 | 2642 | 2642 | 2716 | 2682 | 2615 | 2365 | 2387 | 2414 | 2513 | 2585 | 2699 | 2822 | 3320 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross | cross | cross | on | on | on | on | on | on | on | on | glass | glass | cross- off | cross- off | cross | cross |
High Tide / height (m) | 3:59PM 1.37 | 3:54AM 1.38 | 4:48PM 1.42 | 4:21AM 1.42 | 5:37PM 1.42 | 4:50AM 1.44 | ||||||||||||||||||
Low Tide / height (m) | 10:00PM 0.38 | 10:19AM 0.01 | 10:37PM 0.47 | 10:56AM -0.12 | 11:14PM 0.58 | 11:37AM -0.20 | ||||||||||||||||||
Thu 16 | Friday 17 | Saturday 18 | Sunday 19 | |||||||||||||||||||||
| Sunrise | - | - | - | - | 5:05 | - | - | - | - | - | - | - | 5:03 | - | - | - | - | - | - | - | 5:03 | - | - | - |
| Sunset | 6:10 | - | - | - | - | - | - | - | 6:12 | - | - | - | - | - | - | - | 6:13 | - | - | - | - | - | - | - |
 |  | | | | |  | | |  |  | | |  | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 12 | 11 | 10 | 10 | 9 | 11 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 16 | 17 | 17 | 16 | 16 | 16 | 16 | 15 | 17 | 19 | 18 |
| Feels °C (?) | 3 | 2 | 3 | 4 | 3 | 5 | 8 | 9 | 10 | 10 | 13 | 12 | 13 | 14 | 15 | 15 | 15 | 15 | 16 | 16 | 14 | 14 | 16 | 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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