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Surf Forecasts:
Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 8 am Monday 27 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 4PM is: 1.2m 7s primary swell from a South direction and 1.1m 8s secondary swell from a Southeast direction (forecast issued at 08:00am April 27). An open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be offshore and the swell rating is 2.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (27 Apr) | 5.5ft (1.7m) | 6s |
| Afternoon (27 Apr) | 4ft (1.2m) | 7s |
| Evening (27 Apr) | 3.5ft (1.1m) | 7s |
Table - waves today at Amatu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 18mm), heaviest on Mon morning. Warm (max 21°C on Wed morning, min 13°C on Wed night). Winds increasing (calm on Mon night, strong winds from the SW by Tue night). | ||||||||||||||||||||||||
Monday 27 | Tuesday 28 | Wednesday 29 | Thu 30 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
SE 6 | SE 6 | SSE 7 | S 7 | SSW 7 | SSW 7 | SSW 8 | SSW 8 | SSW 7 | SSW 7 | S 7 | SSW 5 | SW 5 | SW 6 | SW 6 | SW 6 | SW 6 | SW 7 | SW 7 | SW 6 | SW 6 | SSW 6 | SW 6 | SSW 6 | |
139 | 230 | 306 | 142 | 128 | 121 | 128 | 88 | 76 | 82 | 92 | 59 | 110 | 181 | 269 | 284 | 303 | 261 | 158 | 216 | 88 | 67 | 37 | 24 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross | cross-off | off | cross-off | cross | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross-off | cross-off | cross-off | cross-off | |
High Tide | 1:47PM1.10m | 2:24AM1.24m | 2:49PM1.18m | 2:50AM1.29m | 3:38PM1.25m | |||||||||||||||||||
Low Tide | 8:07AM0.65m | 7:56PM0.45m | 8:46AM0.48m | 8:42PM0.49m | 9:19AM0.32m | 9:21PM0.53m | ||||||||||||||||||
 |  |  |  | |  |  | |  |  | | | | | | | | | | | |  | |  | |
 | 4:52 | — | — | — | — | — | — | 4:52 | — | — | — | — | — | — | — | 4:50 | — | — | — | — | — | — | — | 4:50 |
 | — | — | — | — | 6:20 | — | — | — | — | — | — | — | 6:21 | — | — | — | — | — | — | — | 6:22 | — | — | 6:22 |
9 | 16 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | |
Temp °C | 17 | 18 | 15 | 17 | 16 | 14 | 14 | 15 | 16 | 19 | 20 | 20 | 18 | 19 | 19 | 19 | 19 | 20 | 21 | 19 | 17 | 15 | 14 | 13 |
17 | 19 | 11 | 14 | 12 | 13 | 14 | 14 | 13 | 16 | 18 | 16 | 13 | 14 | 14 | 14 | 15 | 16 | 18 | 18 | 15 | 10 | 10 | 8 | |
Swell 1 Height (m) Direction Period (s) | NE 13 | NE 12 | SSE 7 | S 7 | SSW 7 | SSW 7 | SSW 8 | SSW 8 | SSW 7 | ESE 7 | ESE 7 | E 8 | E 8 | SSE 7 | E 9 | E 9 | E 9 | E 9 | E 9 | SSW 6 | SW 6 | SSW 6 | SW 6 | SSW 6 |
 kJ | 59 | 40 | 306 | 142 | 128 | 121 | 128 | 88 | 76 | 31 | 43 | 42 | 31 | 25 | 26 | 27 | 26 | 15 | 14 | 103 | 88 | 67 | 37 | 24 |
Swell 2 Height (m) Direction Period (s) | ENE 8 | ENE 8 | NE 12 | SE 7 | ESE 8 | ESE 7 | ESE 8 | ESE 7 | ESE 7 | NE 8 | NE 8 | NE 8 | SE 7 | E 9 | NE 8 | NE 8 | NE 9 | ENE 8 | ENE 8 | E 9 | E 9 | SE 7 | SE 8 | ESE 8 |
| kJ | 13 | 7 | 37 | 126 | 98 | 70 | 72 | 48 | 43 | 23 | 22 | 20 | 12 | 39 | 2 | 2 | 3 | 7 | 7 | 14 | 13 | 2 | 3 | 19 |
Swell 3 Height (m) Direction Period (s) | ESE 12 | ESE 12 | ENE 8 | NE 12 | NE 12 | NE 7 | NE 7 | NE 8 | NE 8 | NE 11 | NE 11 | SE 7 | NE 7 | NNE 7 | SE 11 | SE 11 | S 13 | SE 11 | SE 11 | NE 8 | NE 8 | S 13 | SE 11 | SE 8 |
| kJ | 14 | 14 | 12 | 22 | 22 | 7 | 14 | 23 | 23 | 5 | 5 | 8 | 9 | 5 | 5 | 5 | 3 | 5 | 5 | 11 | 9 | 3 | 5 | 3 |
Wind waves Height (m) Direction Period (s) | SE 6 | SE 6 | SSW 6 | NW 3 | N 3 | — | — | — | SSE 3 | SSW 7 | S 7 | SSW 5 | SW 5 | SW 6 | SW 6 | SW 6 | SW 6 | SW 7 | SW 7 | SW 6 | NE 5 | ENE 5 | ENE 6 | ENE 6 |
| kJ | 139 | 230 | 253 | 2 | 1 | — | — | — | 1 | 82 | 92 | 59 | 110 | 181 | 269 | 284 | 303 | 261 | 158 | 216 | 13 | 95 | 139 | 119 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 24 | 12 | 6 | 0 | 16 | 16 | 0 | 24 | 24 | 24 | 24 | 849 | 846 | 563 | 279 | 96 | 52 | 35 | 29 | 6 | 29 | 2391 | 1505 | 190 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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