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Surf Forecasts:
Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 8 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 1AM is: 0.5m 9s primary swell from a East direction and 0.8m 5s secondary swell from a East-southeast direction (forecast issued at 08:00pm April 23). An open ocean swell of 0.9m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (24 Apr) | 3.5ft (1.1m) | 8s |
| Afternoon (24 Apr) | 5ft (1.5m) | 7s |
| Evening (24 Apr) | 4.5ft (1.4m) | 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 19mm), heaviest on Thu night. Very mild (max 17°C on Sun morning, min 12°C on Thu night). Winds decreasing (fresh winds from the NNE on Thu night, light winds from the E by Sat night). | ||||||||||||||||||||||||
Thu 23 | Friday 24 | Saturday 25 | Sunday 26 | |||||||||||||||||||||
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 | E 9 | E 9 | ESE 6 | E 6 | S 8 | NE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | E 7 | E 7 | E 7 | NE 14 | NE 14 | NE 14 | NE 14 | |
45 | 42 | 42 | 42 | 76 | 160 | 181 | 198 | 186 | 193 | 199 | 208 | 193 | 188 | 171 | 166 | 138 | 139 | 173 | 103 | 169 | 164 | 158 | 149 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | 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 | cross-on | cross-on | |
High Tide | 10:56PM1.07m | 7:53AM1.18m | 00:24AM1.08m | 9:39AM1.06m | 1:19AM1.12m | 12:12PM1.03m | ||||||||||||||||||
Low Tide | 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 |
6 | 9 | 8 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 14 | 14 | 14 | 14 | 12 | 12 | 14 | 15 | 14 | 14 | 13 | 13 | 12 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 15 | 17 | 17 |
12 | 11 | 9 | 8 | 6 | 6 | 9 | 10 | 9 | 10 | 8 | 8 | 7 | 8 | 9 | 9 | 9 | 10 | 11 | 11 | 11 | 12 | 13 | 14 | |
Swell 1 Height (m) Direction Period (s) | SE 6 | SE 6 | ESE 5 | ESE 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 | E 7 | E 7 | E 7 | E 6 | ENE 7 | ENE 7 | SE 6 |
 kJ | 38 | 29 | 33 | 41 | 76 | 160 | 173 | 113 | 90 | 88 | 58 | 42 | 40 | 27 | 84 | 83 | 80 | 139 | 110 | 103 | 76 | 60 | 41 | 39 |
Swell 2 Height (m) Direction Period (s) | E 9 | E 9 | E 9 | E 9 | S 7 | E 7 | E 7 | SW 9 | SW 9 | SW 9 | SW 9 | SW 8 | NE 14 | NE 13 | S 7 | S 7 | S 7 | NE 12 | NE 12 | ENE 15 | NE 14 | NE 14 | NE 14 | NE 14 |
| kJ | 45 | 42 | 42 | 42 | 36 | 88 | 60 | 20 | 20 | 20 | 21 | 25 | 70 | 88 | 16 | 15 | 8 | 74 | 50 | 87 | 169 | 164 | 158 | 149 |
Swell 3 Height (m) Direction Period (s) | SE 12 | SE 12 | SE 12 | SE 12 | E 9 | E 9 | SE 12 | ESE 12 | ESE 12 | ENE 15 | NE 15 | NE 14 | SW 8 | SW 8 | SW 8 | SW 8 | ENE 16 | ENE 16 | NE 15 | NE 12 | SE 11 | SE 6 | SE 11 | ENE 7 |
| kJ | 23 | 22 | 22 | 22 | 28 | 16 | 22 | 14 | 14 | 21 | 56 | 52 | 18 | 11 | 11 | 10 | 26 | 25 | 57 | 35 | 5 | 20 | 5 | 26 |
Wind waves Height (m) Direction Period (s) | — | ENE 3 | NE 4 | NE 5 | NE 6 | NE 6 | NE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | — | E 7 | — | — | — | SE 6 | — |
| kJ | — | 3 | 12 | 63 | 69 | 105 | 181 | 198 | 186 | 193 | 199 | 208 | 193 | 188 | 171 | 166 | 138 | — | 173 | — | — | — | 32 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 24 | 52 | 279 | 184 | 184 | 96 | 184 | 40 | 87 | 35 | 35 | 190 | 538 | 558 | 538 | 87 | 804 | 24 | 30 | 30 | 35 | 24 | 24 | 24 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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