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Surf Forecasts:
Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 2 am 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
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 7AM is: 1.1m 8s primary swell from a Southeast direction and 0.7m 9s secondary swell from a East-southeast direction (forecast issued at 02:00am May 12). The wind direction is predicted to be cross-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 ForecastMostly dry. Warm (max 21°C on Wed morning, min 15°C on Tue night). Wind will be generally light. | ||||||||||||||||||||||||
Tuesday 12 | Wednesday 13 | Thursday 14 | ||||||||||||||||||||||
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 | 6 PM | 9 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
SE 8 | SE 8 | SE 8 | SE 9 | 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 | ESE 10 | E 10 | E 10 | E 10 | E 10 | |
154 | 171 | 167 | 206 | 294 | 328 | 321 | 357 | 323 | 323 | 346 | 407 | 465 | 528 | 517 | 482 | 452 | 461 | 461 | 502 | 489 | 480 | 422 | 422 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | cross-off | cross-off | cross-off | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-off | |
High Tide | 00:59AM1.19m | 12:48PM1.06m | 1:31AM1.24m | 2:02PM1.16m | 2:01AM1.30m | 3:03PM1.26m | ||||||||||||||||||
Low Tide | 7:12AM0.64m | 6:59PM0.49m | 7:55AM0.46m | 7:54PM0.54m | 8:35AM0.26m | 8:44PM0.61m | ||||||||||||||||||
 | |  | | | | | | |  |  | | | | | | | | |  | | | | | |
 | — | 4:37 | — | — | — | — | — | — | — | 4:37 | — | — | — | — | — | — | — | 4:37 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 6:32 | — | — | — | — | — | — | — | 6:32 | — | — | — | — | — | — | — | 6:34 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 18 | 17 | 17 | 19 | 20 | 20 | 18 | 17 | 16 | 15 | 16 | 19 | 21 | 21 | 19 | 17 | 17 | 16 | 17 | 20 | 20 | 19 | 17 | 16 |
16 | 16 | 16 | 17 | 18 | 18 | 16 | 16 | 16 | 14 | 15 | 18 | 19 | 20 | 20 | 17 | 17 | 14 | 15 | 18 | 16 | 15 | 15 | 14 | |
Swell 1 Height (m) Direction Period (s) | SE 8 | SE 8 | SE 8 | SE 9 | 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 | ESE 10 | E 10 | E 10 | E 10 | E 10 |
 kJ | 154 | 171 | 167 | 206 | 294 | 328 | 321 | 357 | 323 | 323 | 346 | 407 | 465 | 528 | 517 | 482 | 452 | 461 | 461 | 502 | 489 | 480 | 422 | 422 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 9 | ESE 9 | ESE 9 | 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 | NNE 10 | — | NE 10 | NE 10 |
| kJ | 88 | 68 | 65 | 73 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 6 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 10 | — | 15 | 4 |
Swell 3 Height (m) Direction Period (s) | NE 12 | NE 10 | NE 10 | NE 10 | E 10 | E 10 | — | — | N 13 | S 9 | E 12 | NE 12 | — | N 8 | — | S 7 | S 7 | — | — | — | — | — | — | — |
| kJ | 6 | 4 | 4 | 4 | 2 | 2 | — | — | 3 | 2 | 3 | 5 | — | 1 | — | 1 | 1 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | NNE 2 | NNE 2 | — | — | — | — | — | NNE 3 | NE 3 | NNE 10 | NE 4 | — | — | NNE 4 |
| kJ | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | 3 | 5 | 9 | 15 | — | — | 6 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 0 | 0 | 0 | 0 | 16 | 16 | 35 | 0 | 0 | 0 | 0 | 35 | 35 | 87 | 87 | 40 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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