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Surf Forecasts:
Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 8 am Sunday 26 Apr 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
20.0° C
(Which is 1.2°C warmer than normal for this time of year)How big are the waves at Amatu today?
The current surf forecast for Amatu at 12PM is: 0.6m 14s primary swell from a Northeast direction and 0.7m 7s secondary swell from a East-northeast direction, 0.7m 6s secondary swell from a Southeast direction (forecast issued at 08:00am April 26). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (26 Apr) | 2ft (0.6m) | 14s |
| Afternoon (26 Apr) | 1.5ft (0.5m) | 14s |
| Evening (26 Apr) | 1.5ft (0.5m) | 13s |
Table - waves today at Amatu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 37mm), heaviest during Sun night. Warm (max 20°C on Tue afternoon, min 14°C on Mon afternoon). Winds increasing (calm on Mon night, fresh winds from the SW by Tue night). | ||||||||||||||||||||||||
Sunday 26 | Monday 27 | Tuesday 28 | Wed 29 | |||||||||||||||||||||
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 | 12 AM | 3 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
NE 14 | NE 14 | NE 14 | NE 14 | NE 13 | NE 13 | SE 6 | ESE 6 | SE 6 | SE 7 | SE 7 | ESE 7 | S 7 | S 7 | SSW 7 | ESE 8 | SSW 7 | SSW 7 | ESE 8 | ESE 8 | SW 5 | SW 6 | SW 6 | SW 6 | |
169 | 164 | 158 | 91 | 87 | 84 | 85 | 103 | 139 | 263 | 207 | 117 | 97 | 103 | 74 | 50 | 44 | 43 | 44 | 45 | 65 | 160 | 236 | 231 | |
Wind (km/h) | ||||||||||||||||||||||||
cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | off | off | off | cross-off | glassy | glassy | on | on | on | cross-on | cross-on | cross-on | cross | cross | cross | |
High Tide | 12:12PM1.03m | 1:55AM1.17m | 1:47PM1.10m | 2:24AM1.24m | 2:49PM1.18m | 2:50AM1.29m | ||||||||||||||||||
Low Tide | 7:12AM0.83m | 6:57PM0.42m | 8:07AM0.65m | 7:56PM0.45m | 8:46AM0.48m | 8:42PM0.49m | ||||||||||||||||||
 | |  | | |  | |  |  |  |  | | |  | | | | | | | | | | | |
 | 4:54 | — | — | — | — | — | — | 4:52 | — | — | — | — | — | — | — | 4:52 | — | — | — | — | — | — | — | 4:50 |
 | — | — | — | — | 6:19 | — | — | — | — | — | — | — | 6:20 | — | — | — | — | — | — | — | 6:21 | — | — | 6:22 |
— | — | — | — | — | — | — | 4 | 20 | 10 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 15 | 17 | 17 | 18 | 17 | 17 | 17 | 17 | 17 | 17 | 15 | 15 | 14 | 14 | 14 | 14 | 16 | 18 | 19 | 20 | 18 | 18 | 19 | 18 |
13 | 14 | 14 | 15 | 15 | 16 | 16 | 16 | 17 | 17 | 12 | 10 | 12 | 14 | 14 | 13 | 14 | 14 | 16 | 16 | 13 | 13 | 15 | 16 | |
Swell 1 Height (m) Direction Period (s) | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ESE 6 | ESE 6 | SE 6 | ESE 6 | SE 6 | SE 7 | SE 7 | ESE 7 | S 7 | S 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | ESE 8 | ESE 8 | E 8 | E 9 | E 9 | E 9 |
 kJ | 68 | 62 | 47 | 42 | 63 | 75 | 85 | 103 | 139 | 263 | 207 | 117 | 97 | 103 | 74 | 37 | 44 | 37 | 44 | 45 | 41 | 40 | 25 | 25 |
Swell 2 Height (m) Direction Period (s) | NE 14 | SE 6 | NE 14 | NE 14 | NE 13 | NE 13 | NE 13 | NE 13 | NE 13 | NE 12 | NE 12 | S 7 | ESE 7 | SE 7 | ESE 7 | ESE 8 | ESE 7 | ESE 7 | NE 7 | NE 7 | NE 7 | SSE 7 | SSE 7 | NE 7 |
| kJ | 169 | 33 | 158 | 91 | 87 | 84 | 83 | 83 | 59 | 55 | 37 | 94 | 84 | 56 | 48 | 50 | 31 | 43 | 26 | 27 | 27 | 17 | 9 | 8 |
Swell 3 Height (m) Direction Period (s) | SSE 6 | NE 14 | SE 11 | SE 13 | ENE 8 | ENE 9 | ENE 8 | NE 8 | NE 8 | ENE 8 | ENE 8 | NE 12 | NE 8 | ENE 7 | NE 7 | ENE 8 | ENE 8 | NE 8 | NE 11 | SE 7 | SSE 7 | NE 7 | NE 7 | SE 11 |
| kJ | 22 | 164 | 5 | 7 | 24 | 7 | 7 | 15 | 15 | 7 | 6 | 36 | 16 | 18 | 30 | 40 | 40 | 28 | 5 | 13 | 18 | 14 | 14 | 5 |
Wind waves Height (m) Direction Period (s) | — | — | SE 6 | SE 6 | — | — | — | — | — | SW 5 | WNW 3 | NW 3 | N 3 | NE 3 | — | — | — | — | S 7 | SSW 4 | SW 5 | SW 6 | SW 6 | SW 6 |
| kJ | — | — | 33 | 51 | — | — | — | — | — | 80 | 8 | 2 | 1 | 2 | — | — | — | — | 33 | 20 | 65 | 160 | 236 | 231 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 16 | 24 | 35 | 24 | 24 | 24 | 24 | 35 | 40 | 0 | 0 | 96 | 0 | 0 | 0 | 24 | 24 | 24 | 24 | 2114 | 849 | 622 | 73 | 30 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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