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Surf Forecasts:
Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 8 pm 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
20.2° C
(Which is 1.4°C warmer than normal for this time of year)How big are the waves at Amatu today?
The current surf forecast for Amatu at 3AM is: 1.4m 6s primary swell from a Southeast direction and 0.5m 13s secondary swell from a Northeast direction, 0.4m 8s secondary swell from a Northeast direction (forecast issued at 08:00pm April 26). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (27 Apr) | 6ft (1.9m) | 6s |
| Afternoon (27 Apr) | 5.5ft (1.7m) | 7s |
| Evening (27 Apr) | 3.5ft (1.0m) | 7s |
Table - waves today at Amatu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 26mm), heaviest during Sun night. Warm (max 20°C on Tue afternoon, min 14°C on Mon night). Winds decreasing (fresh winds from the SW on Tue night, calm by Wed afternoon). | ||||||||||||||||||||||||
Sun 26 | Monday 27 | Tuesday 28 | Wednesday 29 | |||||||||||||||||||||
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 |   |    |    |    | ||||||||||||||||||||
NE 13 | NE 13 | ESE 6 | SE 6 | SE 6 | SSE 6 | SSE 7 | SSE 7 | S 7 | S 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | ESE 8 | S 7 | E 8 | SW 5 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | |
87 | 84 | 99 | 135 | 188 | 292 | 306 | 286 | 127 | 109 | 97 | 76 | 59 | 51 | 44 | 43 | 33 | 73 | 209 | 278 | 230 | 195 | 184 | 147 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | off | cross-off | cross-off | glassy | on | on | on | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | glassy | |
High Tide | 1:55AM1.17m | 1:47PM1.10m | 2:24AM1.24m | 2:49PM1.18m | 2:50AM1.29m | |||||||||||||||||||
Low Tide | 6:57PM0.42m | 8:07AM0.65m | 7:56PM0.45m | 8:46AM0.48m | 8:42PM0.49m | 9:19AM0.32m | ||||||||||||||||||
 |  | |  |  |  |  | | |  | |  | |  | | | | | | | | | | | |
 | — | — | — | 4:52 | — | — | — | — | — | — | — | 4:52 | — | — | — | — | — | — | — | 4:50 | — | — | — | — |
 | 6:19 | — | — | — | — | — | — | — | 6:20 | — | — | — | — | — | — | — | 6:21 | — | — | — | — | — | — | 6:22 |
— | — | — | 4 | 13 | 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 17 | 17 | 17 | 17 | 18 | 19 | 16 | 17 | 15 | 15 | 14 | 14 | 16 | 18 | 19 | 20 | 18 | 18 | 19 | 19 | 19 | 20 | 20 | 19 |
15 | 16 | 16 | 16 | 16 | 17 | 11 | 13 | 12 | 14 | 13 | 13 | 14 | 15 | 16 | 17 | 13 | 13 | 14 | 15 | 17 | 18 | 18 | 19 | |
Swell 1 Height (m) Direction Period (s) | ESE 6 | NE 13 | NE 13 | NE 13 | NE 13 | SE 7 | SSE 7 | SSE 7 | S 7 | S 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | ESE 8 | E 8 | E 8 | SSE 7 | E 9 | E 9 | E 9 | E 9 | ESE 9 | ESE 9 |
 kJ | 75 | 84 | 83 | 83 | 59 | 214 | 306 | 286 | 127 | 109 | 97 | 76 | 59 | 51 | 44 | 29 | 31 | 17 | 41 | 27 | 26 | 25 | 26 | 25 |
Swell 2 Height (m) Direction Period (s) | NE 13 | ENE 8 | ENE 8 | NE 8 | ENE 8 | NE 12 | NE 12 | NE 12 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | ESE 8 | SSW 7 | NE 7 | SSE 7 | E 9 | NE 8 | NE 10 | NE 10 | NE 9 | NE 8 | NE 8 |
| kJ | 87 | 14 | 7 | 15 | 7 | 55 | 37 | 36 | 101 | 72 | 50 | 50 | 44 | 44 | 35 | 26 | 19 | 40 | 15 | 14 | 14 | 12 | 11 | 11 |
Swell 3 Height (m) Direction Period (s) | ENE 8 | NE 8 | ESE 13 | ESE 12 | ESE 12 | ENE 9 | ENE 9 | ENE 8 | NE 12 | NE 6 | NE 7 | NE 8 | NE 8 | NE 7 | NE 7 | SSE 7 | NE 7 | NE 7 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 |
| kJ | 24 | 9 | 16 | 14 | 14 | 8 | 8 | 11 | 36 | 40 | 42 | 50 | 28 | 23 | 27 | 20 | 24 | 18 | 5 | 5 | 5 | 5 | 5 | 5 |
Wind waves Height (m) Direction Period (s) | — | ESE 6 | ESE 6 | SE 6 | SE 6 | SSE 6 | SW 7 | NW 3 | NNE 4 | NE 6 | NNE 7 | — | — | SSE 2 | SSE 3 | S 7 | SSW 4 | SW 5 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 | SW 6 |
| kJ | — | 75 | 99 | 135 | 188 | 292 | 248 | 4 | 13 | 89 | 123 | — | — | 1 | 3 | 43 | 33 | 73 | 209 | 278 | 230 | 195 | 184 | 147 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 24 | 24 | 30 | 87 | 87 | 30 | 29 | 60 | 16 | 0 | 0 | 24 | 24 | 24 | 24 | 24 | 804 | 849 | 279 | 71 | 30 | 6 | 6 | 0 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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