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Surf Forecasts:
Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 2 pm Thursday 23 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
19.5° C
(Which is slightly warmer than usual)How big are the waves at Amatu today?
The current surf forecast for Amatu at 9PM is: 0.5m 9s primary swell from a East direction and 0.6m 6s secondary swell from a Southeast direction, 0.6m 3s secondary swell from a East-northeast direction (forecast issued at 02:00pm April 23). The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (23 Apr) | - | - |
| Afternoon (23 Apr) | 2.5ft (0.8m) | 6s |
| Evening (23 Apr) | 1.5ft (0.5m) | 9s |
Table - waves today at Amatu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 27mm), heaviest during Thu night. Very mild (max 17°C on Sun morning, min 12°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||||||
Thu 23 | Friday 24 | Saturday 25 | Sun 26 | |||||||||||||||||||||
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 | 6 AM | 9 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
SE 6 | SE 6 | E 9 | E 9 | E 9 | E 6 | E 6 | S 8 | NE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | E 7 | E 7 | E 7 | E 6 | E 6 | NE 14 | NE 14 | |
59 | 47 | 45 | 42 | 42 | 66 | 74 | 165 | 173 | 160 | 132 | 156 | 163 | 188 | 198 | 186 | 152 | 148 | 128 | 131 | 119 | 113 | 169 | 164 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross | cross | cross | cross-on | |
High Tide | 10:56PM1.07m | 7:53AM1.18m | 00:24AM1.08m | 9:39AM1.06m | 1:19AM1.12m | |||||||||||||||||||
Low Tide | 2:59PM0.11m | 2:36AM0.98m | 4:13PM0.25m | 4:58AM0.96m | 5:39PM0.36m | 7:12AM0.83m | ||||||||||||||||||
 | | |  |  |  | |  | | | |  |  | | |  | | | | | | | | | |
 | — | — | — | — | — | 4:56 | — | — | — | — | — | — | — | 4:56 | — | — | — | — | — | — | — | 4:54 | — | — |
 | — | — | 6:16 | — | — | — | — | — | — | — | 6:17 | — | — | — | — | — | — | — | 6:19 | — | — | — | — | 6:19 |
1 | 1 | 5 | 12 | 7 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 19 | 15 | 13 | 13 | 14 | 13 | 12 | 14 | 16 | 15 | 14 | 14 | 14 | 13 | 13 | 14 | 15 | 15 | 14 | 14 | 14 | 13 | 14 | 16 |
19 | 13 | 11 | 10 | 9 | 8 | 6 | 9 | 10 | 10 | 10 | 10 | 10 | 8 | 8 | 8 | 10 | 10 | 10 | 11 | 11 | 10 | 12 | 12 | |
Swell 1 Height (m) Direction Period (s) | SE 6 | SE 6 | SE 6 | SE 6 | ESE 5 | E 6 | E 6 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 | S 7 | NE 13 | NE 13 | NE 13 | NE 12 | ENE 16 | E 6 | ENE 7 | SE 6 |
 kJ | 59 | 47 | 38 | 28 | 37 | 66 | 74 | 165 | 144 | 113 | 88 | 86 | 61 | 41 | 40 | 26 | 84 | 83 | 80 | 73 | 95 | 113 | 73 | 33 |
Swell 2 Height (m) Direction Period (s) | E 10 | E 9 | E 9 | E 9 | E 9 | E 9 | S 8 | E 7 | E 7 | E 8 | SW 9 | SW 9 | SW 8 | SW 8 | NE 14 | NE 13 | S 7 | S 7 | S 7 | ENE 16 | NE 12 | ENE 15 | SE 6 | NE 14 |
| kJ | 46 | 45 | 45 | 42 | 42 | 28 | 41 | 56 | 34 | 23 | 19 | 19 | 24 | 25 | 51 | 88 | 25 | 15 | 8 | 25 | 36 | 87 | 26 | 164 |
Swell 3 Height (m) Direction Period (s) | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | E 9 | E 9 | SE 12 | SW 9 | ESE 12 | NE 15 | NE 15 | NE 14 | SW 8 | SW 8 | SW 8 | WSW 8 | ENE 16 | S 6 | SE 11 | NE 12 | NE 14 | SE 11 |
| kJ | 25 | 39 | 23 | 22 | 22 | 22 | 28 | 27 | 22 | 19 | 14 | 34 | 56 | 52 | 24 | 11 | 10 | 6 | 26 | 3 | 5 | 35 | 169 | 5 |
Wind waves Height (m) Direction Period (s) | — | — | — | ENE 3 | NE 4 | NE 5 | NE 5 | NE 6 | NE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | E 7 | E 7 | E 7 | E 6 | — | E 6 | ENE 7 |
| kJ | — | — | — | 9 | 34 | 51 | 62 | 132 | 173 | 160 | 132 | 156 | 163 | 188 | 198 | 186 | 152 | 148 | 128 | 131 | 119 | — | 105 | 62 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 6 | 24 | 24 | 52 | 279 | 184 | 96 | 69 | 35 | 87 | 87 | 35 | 35 | 190 | 538 | 190 | 40 | 87 | 842 | 30 | 35 | 35 | 190 | 30 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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