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Surf Forecasts:
Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 8 pm Wednesday 13 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
18.0° C
(Which is 2.3°C colder than average for this time of year)How big are the waves at Amatu today?
The current surf forecast for Amatu at 3AM is: 1.6m 10s primary swell from a East-southeast direction and 0.1m 10s secondary swell from a Northeast direction (forecast issued at 08:00pm May 13). The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (14 May) | 5ft (1.5m) | 10s |
| Afternoon (14 May) | 4.5ft (1.4m) | 9s |
| Evening (14 May) | 5ft (1.6m) | 9s |
Table - waves today at Amatu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 2mm), mostly falling on Wed night. Warm (max 21°C on Thu morning, min 15°C on Thu night). Wind will be generally light. | ||||||||||||||||||||||||
Wed 13 | Thursday 14 | Friday 15 | Saturday 16 | |||||||||||||||||||||
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 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | E 9 | E 9 | E 9 | E 9 | E 9 | ENE 9 | ENE 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | |
539 | 561 | 471 | 471 | 461 | 383 | 367 | 307 | 427 | 425 | 339 | 300 | 388 | 360 | 409 | 388 | 332 | 274 | 235 | 230 | 194 | 127 | 106 | 108 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross | cross | cross-on | |
High Tide | 2:01AM1.30m | 3:03PM1.26m | 2:33AM1.36m | 3:59PM1.35m | 3:05AM1.42m | |||||||||||||||||||
Low Tide | 7:54PM0.54m | 8:35AM0.26m | 8:44PM0.61m | 9:16AM0.06m | 9:31PM0.69m | 9:58AM-0.11m | ||||||||||||||||||
 |  |  | |  |  | | | |  | |  |  | | | | | | | | | | | | |
 | — | — | — | 4:37 | — | — | — | — | — | — | — | 4:35 | — | — | — | — | — | — | — | 4:35 | — | — | — | — |
 | 6:32 | — | — | — | — | — | — | — | 6:34 | — | — | — | — | — | — | — | 6:35 | — | — | — | — | — | — | 6:36 |
1 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 20 | 18 | 18 | 17 | 17 | 20 | 21 | 20 | 17 | 16 | 16 | 15 | 15 | 16 | 17 | 18 | 17 | 18 | 17 | 17 | 17 | 20 | 21 | 21 |
21 | 18 | 18 | 16 | 17 | 19 | 19 | 17 | 14 | 12 | 13 | 11 | 11 | 12 | 13 | 15 | 15 | 17 | 16 | 16 | 16 | 19 | 20 | 20 | |
Swell 1 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | E 9 | E 9 | E 9 | E 9 | SE 12 | SE 10 | SE 9 | SE 10 | SE 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | SE 7 |
 kJ | 539 | 561 | 471 | 471 | 461 | 383 | 367 | 307 | 427 | 425 | 339 | 300 | 21 | 57 | 42 | 34 | 30 | 274 | 235 | 230 | 194 | 127 | 106 | 67 |
Swell 2 Height (m) Direction Period (s) | NE 10 | NE 10 | NE 10 | NE 10 | NE 10 | S 7 | S 7 | NNE 10 | NNE 10 | — | S 7 | — | SE 10 | SE 12 | SSE 12 | SE 12 | SE 11 | SE 9 | SE 9 | SE 9 | SE 7 | SE 9 | SE 7 | E 9 |
| kJ | 4 | 4 | 4 | 4 | 4 | 1 | 1 | 10 | 10 | — | 1 | — | 4 | 6 | 15 | 22 | 20 | 37 | 27 | 28 | 19 | 95 | 48 | 108 |
Swell 3 Height (m) Direction Period (s) | S 8 | — | S 9 | S 9 | — | S 7 | — | — | — | — | — | — | — | NE 10 | SE 16 | S 7 | S 7 | SE 11 | SE 11 | SE 11 | SE 11 | SE 12 | ESE 9 | ESE 9 |
| kJ | 1 | — | 2 | 2 | — | 1 | — | — | — | — | — | — | — | 4 | 10 | 1 | 1 | 19 | 19 | 19 | 19 | 22 | 16 | 16 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | ENE 3 | ENE 4 | ENE 4 | NE 10 | NE 5 | NE 5 | E 9 | ENE 9 | ENE 9 | E 9 | E 9 | — | — | — | NE 7 | — | — | — |
| kJ | — | — | — | — | — | — | 1 | 11 | 32 | 4 | 32 | 40 | 388 | 360 | 409 | 388 | 332 | — | — | — | 11 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 35 | 0 | 0 | 0 | 0 | 0 | 35 | 87 | 87 | 35 | 190 | 190 | 190 | 537 | 2839 | 35 | 87 | 16 | 0 | 0 | 0 | 16 | 40 | 24 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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