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Surf Forecasts:
Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 8 pm Saturday 16 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
19.3° C
(Which is 1.3°C colder than average for this time of year)How big are the waves at Amatu today?
The current surf forecast for Amatu at 12AM is: 0.8m 9s primary swell from a East-southeast direction and 0.6m 10s secondary swell from a East direction (forecast issued at 08:00pm May 16). The wind direction is predicted to be glassy.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 May) | 3ft (0.9m) | 9s |
| Afternoon (17 May) | 3.5ft (1.1m) | 8s |
| Evening (17 May) | 4.5ft (1.3m) | 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 17°C on Sat night). Wind will be generally light. | ||||||||||||||||||||||||
Sat 16 | Sunday 17 | Monday 18 | Tuesday 19 | |||||||||||||||||||||
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 |   |    |    |    | ||||||||||||||||||||
E 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | E 8 | E 9 | E 9 | ESE 8 | ESE 8 | E 9 | E 9 | E 10 | E 9 | E 10 | |
78 | 99 | 103 | 101 | 140 | 140 | 158 | 180 | 203 | 237 | 232 | 217 | 212 | 190 | 147 | 158 | 154 | 115 | 115 | 96 | 76 | 92 | 85 | 90 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | glassy | glassy | off | off | glassy | cross-on | cross-on | on | glassy | glassy | glassy | glassy | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | |
High Tide | 4:54PM1.41m | 3:40AM1.46m | 5:49PM1.42m | 4:17AM1.49m | 6:43PM1.40m | 4:56AM1.49m | ||||||||||||||||||
Low Tide | 10:16PM0.77m | 10:41AM-0.22m | 10:59PM0.84m | 11:27AM-0.26m | 11:41PM0.90m | 12:15PM-0.22m | ||||||||||||||||||
 |  |  | |  | | | | | | | | | | | | | | | | | | | | |
 | — | — | — | 4:33 | — | — | — | — | — | — | — | 4:33 | — | — | — | — | — | — | — | 4:33 | — | — | — | — |
 | 6:36 | — | — | — | — | — | — | — | 6:36 | — | — | — | — | — | — | — | 6:37 | — | — | — | — | — | — | 6:37 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 18 | 18 | 17 | 17 | 17 | 21 | 23 | 22 | 20 | 19 | 19 | 19 | 19 | 21 | 22 | 22 | 21 | 20 | 19 | 19 | 19 | 22 | 22 | 22 |
17 | 19 | 17 | 16 | 16 | 21 | 22 | 21 | 19 | 19 | 19 | 18 | 19 | 20 | 21 | 21 | 21 | 20 | 19 | 19 | 19 | 22 | 20 | 20 | |
Swell 1 Height (m) Direction Period (s) | E 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 9 | ESE 9 | ESE 9 | ESE 8 | ESE 8 | ESE 8 | E 8 | E 9 | E 9 | ESE 8 | ESE 8 | E 9 | E 9 | E 10 | E 9 | E 10 |
 kJ | 78 | 99 | 103 | 101 | 140 | 140 | 158 | 180 | 203 | 237 | 232 | 217 | 212 | 190 | 147 | 158 | 154 | 115 | 115 | 96 | 76 | 92 | 85 | 88 |
Swell 2 Height (m) Direction Period (s) | SE 9 | E 10 | E 10 | E 9 | SE 11 | SE 11 | NE 9 | NE 9 | ENE 8 | ENE 9 | ENE 9 | NE 9 | NE 11 | ENE 10 | SE 8 | SE 8 | SE 7 | SE 7 | SE 10 | SE 11 | SE 8 | SE 9 | SE 10 | SE 11 |
| kJ | 64 | 67 | 67 | 42 | 19 | 19 | 21 | 20 | 7 | 8 | 8 | 13 | 4 | 10 | 14 | 14 | 14 | 14 | 35 | 72 | 54 | 62 | 77 | 90 |
Swell 3 Height (m) Direction Period (s) | NE 7 | NE 8 | SE 11 | SE 11 | ENE 10 | ENE 9 | SE 11 | SE 11 | ENE 9 | NE 9 | NE 9 | ENE 11 | NNE 9 | SE 8 | SE 10 | SE 10 | SE 10 | SE 9 | SE 7 | ENE 9 | ESE 10 | ENE 9 | NE 9 | ENE 9 |
| kJ | 8 | 9 | 18 | 19 | 19 | 16 | 19 | 19 | 15 | 3 | 12 | 12 | 7 | 16 | 16 | 17 | 17 | 14 | 13 | 8 | 20 | 8 | 13 | 8 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | S 3 | S 3 | S 3 | SSW 4 | S 4 | SSW 3 | S 4 | S 3 | S 4 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 5 | 5 | 10 | 10 | 9 | 6 | 6 | 9 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 40 | 0 | 0 | 0 | 0 | 0 | 8 | 43 | 24 | 0 | 0 | 0 | 0 | 24 | 24 | 24 | 24 | 117 | 117 | 35 | 96 | 117 | 24 | 24 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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