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Surf Forecasts:
Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 8 pm Monday 11 May 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
20.2° C
(Which is normal for this time of year)How big are the waves at Amatu today?
The current surf forecast for Amatu at 2AM is: 1.1m 8s primary swell from a Southeast direction and 0.7m 10s secondary swell from a East-southeast direction (forecast issued at 08:00pm May 11). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 May) | 3.5ft (1.1m) | 9s |
| Afternoon (12 May) | 4.5ft (1.4m) | 9s |
| Evening (12 May) | 5ft (1.5m) | 9s |
Table - waves today at Amatu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastSome drizzle, heaviest during Wed afternoon. Warm (max 20°C on Tue morning, min 15°C on Tue night). Wind will be generally light. | ||||||||||||||||||||||||
Mon 11 | Tuesday 12 | Wednesday 13 | Thursday 14 | |||||||||||||||||||||
6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | |
Swell Height Map |   |    |    |    | ||||||||||||||||||||
ESE 10 | ESE 10 | SE 8 | SE 8 | SE 8 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | E 10 | E 10 | |
109 | 111 | 154 | 171 | 167 | 206 | 294 | 328 | 321 | 357 | 323 | 370 | 431 | 490 | 517 | 475 | 551 | 550 | 491 | 482 | 471 | 512 | 499 | 499 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | on | on | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | cross-off | cross-off | cross-off | cross | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | |
High Tide | 00:59AM1.19m | 12:48PM1.06m | 1:31AM1.24m | 2:02PM1.16m | 2:01AM1.30m | |||||||||||||||||||
Low Tide | 5:57PM0.44m | 7:12AM0.64m | 6:59PM0.49m | 7:55AM0.46m | 7:54PM0.54m | 8:35AM0.26m | ||||||||||||||||||
 |  | | | | | | | | | |  |  |  | |  | | |  | | | | | | |
 | — | — | — | 4:37 | — | — | — | — | — | — | — | 4:37 | — | — | — | — | — | — | — | 4:37 | — | — | — | — |
 | 6:31 | — | — | — | — | — | — | — | 6:32 | — | — | — | — | — | — | — | 6:32 | — | — | — | — | — | — | 6:34 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | |
Temp °C | 19 | 18 | 18 | 17 | 17 | 19 | 20 | 19 | 18 | 17 | 16 | 15 | 16 | 19 | 20 | 20 | 19 | 18 | 17 | 17 | 17 | 20 | 20 | 20 |
16 | 16 | 16 | 16 | 17 | 17 | 18 | 17 | 17 | 17 | 16 | 14 | 15 | 18 | 19 | 19 | 19 | 18 | 17 | 17 | 16 | 18 | 17 | 17 | |
Swell 1 Height (m) Direction Period (s) | ESE 10 | ESE 10 | SE 8 | SE 8 | SE 8 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | E 10 | E 10 |
 kJ | 109 | 111 | 154 | 171 | 167 | 206 | 294 | 328 | 321 | 357 | 323 | 370 | 431 | 490 | 517 | 475 | 551 | 550 | 491 | 482 | 471 | 512 | 499 | 499 |
Swell 2 Height (m) Direction Period (s) | E 11 | NE 11 | ESE 10 | ESE 9 | ESE 9 | ESE 9 | NE 10 | NE 10 | NE 10 | NE 9 | NE 9 | NE 9 | N 9 | NE 12 | NE 11 | NE 10 | NE 10 | NE 10 | NE 10 | NE 10 | NE 10 | NE 10 | NNE 10 | — |
| kJ | 2 | 5 | 88 | 68 | 65 | 73 | 4 | 4 | 4 | 3 | 3 | 3 | 2 | 6 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 10 | — |
Swell 3 Height (m) Direction Period (s) | — | N 8 | NE 12 | NE 10 | NE 10 | NE 10 | E 10 | E 10 | — | — | N 13 | — | E 12 | NE 9 | N 9 | — | — | — | S 9 | — | — | — | S 8 | — |
| kJ | — | 1 | 6 | 4 | 4 | 4 | 2 | 2 | — | — | 3 | — | 3 | 3 | 1 | — | — | — | 2 | — | — | — | 1 | — |
Wind waves Height (m) Direction Period (s) | SSE 6 | SSE 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 48 | 98 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 24 | 24 | 24 | 24 | 0 | 24 | 24 | 24 | 24 | 6 | 0 | 0 | 0 | 0 | 35 | 35 | 35 | 0 | 0 | 0 | 0 | 35 | 35 | 35 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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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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