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Surf Forecasts:
Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 2 pm Tuesday 12 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
18.9° 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 10PM is: 1.5m 9s primary swell from a Southeast direction and 0.1m 9s secondary swell from a Northeast direction (forecast issued at 02:00pm May 12). The wind direction is predicted to be cross-shore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 May) | - | - |
| 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 ForecastMostly dry. Warm (max 21°C on Wed morning, min 15°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Tue 12 | Wednesday 13 | Thursday 14 | Fri 15 | |||||||||||||||||||||
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 | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | |
294 | 328 | 357 | 357 | 323 | 323 | 370 | 398 | 455 | 506 | 550 | 561 | 540 | 471 | 512 | 499 | 552 | 535 | 474 | 482 | 482 | 377 | 417 | 319 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross | |
High Tide | 12:48PM1.06m | 1:31AM1.24m | 2:02PM1.16m | 2:01AM1.30m | 3:03PM1.26m | 2:33AM1.36m | ||||||||||||||||||
Low Tide | 6:59PM0.49m | 7:55AM0.46m | 7:54PM0.54m | 8:35AM0.26m | 8:44PM0.61m | |||||||||||||||||||
 | | |  | | | | |  | | |  | | | |  | | | | | | | | | |
 | — | — | — | — | — | 4:37 | — | — | — | — | — | — | — | 4:37 | — | — | — | — | — | — | — | 4:35 | — | — |
 | — | — | 6:32 | — | — | — | — | — | — | — | 6:32 | — | — | — | — | — | — | — | 6:34 | — | — | — | — | 6:35 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 20 | 20 | 19 | 17 | 17 | 16 | 16 | 20 | 21 | 20 | 19 | 18 | 17 | 17 | 17 | 20 | 20 | 19 | 17 | 16 | 16 | 16 | 15 | 18 |
18 | 18 | 18 | 16 | 17 | 15 | 15 | 19 | 19 | 19 | 19 | 18 | 17 | 16 | 15 | 17 | 16 | 15 | 14 | 13 | 15 | 14 | 13 | 16 | |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 |
 kJ | 294 | 328 | 357 | 357 | 323 | 323 | 370 | 398 | 455 | 506 | 550 | 561 | 540 | 471 | 512 | 499 | 552 | 535 | 474 | 482 | 482 | 377 | 417 | 319 |
Swell 2 Height (m) Direction Period (s) | NE 10 | NE 10 | NE 10 | NE 9 | NE 9 | NE 9 | NE 9 | NE 12 | NE 11 | NE 11 | NE 10 | NE 10 | NE 10 | NE 10 | NE 10 | NE 10 | — | — | — | NE 10 | NE 10 | NE 10 | SSE 12 | SSE 12 |
| kJ | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 6 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | — | — | — | 4 | 4 | 4 | 13 | 15 |
Swell 3 Height (m) Direction Period (s) | E 10 | E 10 | — | — | N 13 | S 9 | E 12 | NE 9 | — | — | S 8 | — | S 9 | — | — | — | — | — | — | — | — | — | NE 10 | NE 10 |
| kJ | 2 | 2 | — | — | 3 | 2 | 3 | 3 | — | — | 1 | — | 2 | — | — | — | — | — | — | — | — | — | 4 | 4 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | NNE 3 | — | — | NE 4 | NE 4 | NE 4 | NNE 10 | NE 4 | NE 4 | NE 4 | NE 4 | NNE 5 | NE 4 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | 17 | 20 | 31 | 10 | 27 | 28 | 22 | 14 | 39 | 20 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 24 | 24 | 24 | 24 | 0 | 0 | 0 | 0 | 35 | 40 | 0 | 0 | 0 | 0 | 0 | 35 | 35 | 87 | 87 | 35 | 0 | 40 | 0 | 16 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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