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Surf Forecasts:
Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 8 am Friday 22 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
21.4° C
(Which is normal for this time of year)How big are the waves at Amatu today?
The current surf forecast for Amatu at 4PM is: 2.4m 8s primary swell from a Northeast direction and 0.7m 7s secondary swell from a South direction (forecast issued at 08:00am May 22). An open ocean swell of 0.4m 8s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 May) | 4.5ft (1.3m) | 7s |
| Afternoon (22 May) | 7ft (2.2m) | 8s |
| Evening (22 May) | 8ft (2.5m) | 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 7mm), mostly falling on Sat night. Very mild (max 19°C on Sun morning, min 14°C on Fri afternoon). Winds decreasing (strong winds from the NNE on Fri afternoon, light winds from the ESE by Sun night). | ||||||||||||||||||||||||
Friday 22 | Saturday 23 | Sunday 24 | Mon 25 | |||||||||||||||||||||
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 7 | NE 7 | NE 7 | NE 8 | NE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | E 9 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | ESE 9 | E 9 | E 9 | E 9 | E 9 | ENE 9 | |
143 | 171 | 211 | 544 | 860 | 1101 | 982 | 938 | 909 | 909 | 882 | 792 | 724 | 654 | 782 | 470 | 470 | 602 | 626 | 388 | 311 | 304 | 269 | 308 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | |
High Tide | 7:16AM1.29m | 10:17PM1.20m | 8:25AM1.17m | 11:09PM1.19m | 10:06AM1.06m | 11:57PM1.21m | ||||||||||||||||||
Low Tide | 2:50PM0.18m | 3:17AM0.93m | 3:49PM0.35m | 4:59AM0.85m | 4:54PM0.49m | |||||||||||||||||||
 | | |  | |  | | | |  | | | | | |  |  | | | | |  | | | |
 | 4:31 | — | — | — | — | — | — | 4:30 | — | — | — | — | — | — | — | 4:30 | — | — | — | — | — | — | — | 4:28 |
 | — | — | — | — | 6:39 | — | — | — | — | — | — | — | 6:40 | — | — | — | — | — | — | — | 6:42 | — | — | 6:42 |
3 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | 1 | 1 | — | — | — | — | — | |
Temp °C | 16 | 17 | 16 | 15 | 14 | 15 | 14 | 15 | 15 | 16 | 17 | 18 | 17 | 17 | 18 | 17 | 17 | 18 | 19 | 19 | 19 | 19 | 19 | 19 |
12 | 14 | 11 | 8 | 7 | 9 | 9 | 11 | 10 | 11 | 12 | 14 | 14 | 14 | 15 | 15 | 15 | 16 | 17 | 17 | 18 | 18 | 19 | 19 | |
Swell 1 Height (m) Direction Period (s) | SSW 8 | SSW 8 | SSW 7 | S 7 | SSW 8 | SSW 8 | SSW 8 | S 7 | S 7 | SSW 7 | SSW 7 | S 7 | E 10 | SW 7 | E 10 | E 10 | E 10 | SW 7 | S 7 | E 9 | E 9 | E 9 | E 9 | ENE 9 |
 kJ | 123 | 120 | 97 | 48 | 48 | 33 | 33 | 8 | 8 | 10 | 9 | 8 | 724 | 2 | 652 | 470 | 470 | 2 | 1 | 388 | 311 | 304 | 269 | 308 |
Swell 2 Height (m) Direction Period (s) | ESE 10 | ESE 10 | ESE 10 | SW 8 | S 9 | S 9 | — | SW 8 | WSW 8 | SSE 7 | SSE 7 | WSW 7 | — | — | SW 7 | SW 8 | NE 10 | SW 7 | SW 7 | SW 7 | SE 7 | SE 7 | SE 7 | SE 7 |
| kJ | 51 | 55 | 55 | 15 | 6 | 2 | — | 10 | 6 | 5 | 5 | 5 | — | — | 2 | 2 | 4 | 2 | 2 | 2 | 153 | 167 | 171 | 174 |
Swell 3 Height (m) Direction Period (s) | ESE 10 | ESE 10 | — | — | — | — | — | — | SSE 8 | — | — | — | — | — | — | — | — | — | — | — | — | E 16 | ESE 11 | ESE 11 |
| kJ | 72 | 54 | — | — | — | — | — | — | 6 | — | — | — | — | — | — | — | — | — | — | — | — | 5 | 12 | 12 |
Wind waves Height (m) Direction Period (s) | NE 7 | NE 7 | NE 7 | NE 8 | NE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | E 9 | — | E 10 | E 10 | SSE 6 | SE 6 | E 10 | ESE 9 | SE 7 | — | — | — | — |
| kJ | 143 | 171 | 211 | 544 | 860 | 1101 | 982 | 938 | 909 | 909 | 882 | 792 | — | 654 | 782 | 44 | 54 | 602 | 626 | 144 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 537 | 0 | 190 | 554 | 190 | 190 | 537 | 601 | 846 | 929 | 35 | 601 | 601 | 929 | 30 | 55 | 35 | 87 | 53 | 87 | 35 | 24 | 24 | 24 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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