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Surf Forecasts:
Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 2 pm Friday 15 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
18.8° C
(Which is 1.6°C colder than average for this time of year)How big are the waves at Amatu today?
The current surf forecast for Amatu at 9PM is: 1.1m 9s primary swell from a East direction and 0.5m 9s secondary swell from a Southeast direction (forecast issued at 02:00pm May 15). The wind direction is predicted to be cross-shore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 May) | - | - |
| Afternoon (15 May) | 4ft (1.2m) | 9s |
| Evening (15 May) | 3.5ft (1.1m) | 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 23°C on Sun morning, min 16°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Fri 15 | Saturday 16 | Sunday 17 | Mon 18 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | SE 9 | SE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | |
287 | 251 | 241 | 196 | 192 | 192 | 159 | 126 | 106 | 85 | 81 | 112 | 127 | 101 | 140 | 137 | 144 | 172 | 227 | 274 | 287 | 243 | 249 | 197 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | cross | cross | cross | cross-off | cross-off | cross-off | cross | cross-on | cross-on | cross-on | glassy | glassy | glassy | glassy | glassy | on | on | cross-on | cross | cross-off | glassy | glassy | glassy | |
High Tide | 3:59PM1.35m | 3:05AM1.42m | 4:54PM1.41m | 3:40AM1.46m | 5:49PM1.42m | 4:17AM1.49m | ||||||||||||||||||
Low Tide | 9:16AM0.06m | 9:31PM0.69m | 9:58AM-0.11m | 10:16PM0.77m | 10:41AM-0.22m | 10:59PM0.84m | ||||||||||||||||||
 | | |  | | |  | | | | | | |  |  | | | | | | | | | | |
 | — | — | — | — | — | 4:35 | — | — | — | — | — | — | — | 4:33 | — | — | — | — | — | — | — | 4:33 | — | — |
 | — | — | 6:35 | — | — | — | — | — | — | — | 6:36 | — | — | — | — | — | — | — | 6:36 | — | — | — | — | 6:37 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 17 | 18 | 17 | 17 | 16 | 16 | 16 | 18 | 20 | 20 | 19 | 18 | 17 | 17 | 17 | 21 | 23 | 22 | 20 | 19 | 20 | 19 | 19 | 22 |
14 | 16 | 15 | 16 | 15 | 15 | 15 | 16 | 18 | 18 | 18 | 19 | 17 | 17 | 16 | 21 | 22 | 20 | 19 | 17 | 19 | 19 | 20 | 22 | |
Swell 1 Height (m) Direction Period (s) | SE 10 | SE 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | E 9 | SE 9 | SE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 |
 kJ | 47 | 43 | 241 | 196 | 192 | 192 | 159 | 126 | 106 | 85 | 81 | 112 | 127 | 101 | 140 | 137 | 144 | 172 | 227 | 274 | 287 | 243 | 249 | 197 |
Swell 2 Height (m) Direction Period (s) | SSE 12 | SE 12 | SE 9 | SE 9 | SE 10 | SE 9 | ESE 8 | ESE 9 | SE 9 | SE 9 | E 9 | E 10 | E 8 | E 9 | SE 11 | ENE 9 | NE 9 | NE 9 | NE 9 | NE 8 | ENE 9 | NE 11 | SSE 8 | SSE 8 |
| kJ | 15 | 22 | 42 | 37 | 45 | 28 | 46 | 54 | 64 | 64 | 78 | 67 | 37 | 42 | 19 | 15 | 19 | 20 | 21 | 11 | 16 | 5 | 13 | 26 |
Swell 3 Height (m) Direction Period (s) | NE 9 | NNE 8 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 12 | SE 11 | SE 11 | NE 7 | NE 8 | SE 11 | SE 11 | NE 9 | SE 11 | SE 11 | SE 11 | ENE 9 | NE 9 | ENE 11 | ENE 11 | ENE 10 | NE 10 |
| kJ | 3 | 6 | 20 | 19 | 19 | 19 | 19 | 22 | 19 | 19 | 8 | 9 | 18 | 19 | 12 | 19 | 19 | 19 | 15 | 3 | 12 | 12 | 10 | 4 |
Wind waves Height (m) Direction Period (s) | E 9 | E 9 | — | — | — | — | NE 7 | NE 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 287 | 251 | — | — | — | — | 11 | 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 35 | 43 | 87 | 5 | 0 | 0 | 0 | 16 | 40 | 24 | 24 | 0 | 0 | 0 | 0 | 0 | 6 | 24 | 24 | 6 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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