- Forecast
- Maps
- Live
- Weather State
- Spot Information
Surf Forecasts:
Amatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 8 pm Tuesday 19 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 slightly warmer than usual)How big are the waves at Amatu today?
The current surf forecast for Amatu at 5AM is: 0.7m 10s primary swell from a Southeast direction and 0.6m 10s secondary swell from a East direction, 0.9m 4s secondary swell from a South-southwest direction (forecast issued at 08:00pm May 19). The wind direction is predicted to be cross-shore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 2.5ft (0.8m) | 10s |
| Afternoon (20 May) | 3ft (0.9m) | 10s |
| Evening (20 May) | 2.5ft (0.8m) | 10s |
Table - waves today at Amatu. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 28mm), heaviest during Thu afternoon. Warm (max 23°C on Wed morning, min 16°C on Thu night). Mainly strong winds. | ||||||||||||||||||||||||
Tue 19 | Wednesday 20 | Thursday 21 | Friday 22 | |||||||||||||||||||||
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 10 | SE 11 | SE 11 | SE 10 | SE 10 | SE 10 | SE 10 | ESE 10 | ESE 10 | SE 10 | ESE 10 | ESE 10 | ESE 10 | SSW 6 | SSW 7 | SSW 7 | SSW 7 | SW 8 | SSW 8 | SSW 8 | S 7 | NE 7 | NE 8 | NE 9 | |
90 | 110 | 110 | 108 | 104 | 124 | 110 | 164 | 161 | 117 | 142 | 142 | 145 | 235 | 397 | 431 | 418 | 776 | 263 | 176 | 100 | 353 | 619 | 1174 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross-on | cross-on | cross | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 7:37PM1.34m | 5:38AM1.46m | 8:31PM1.28m | 6:24AM1.39m | 9:24PM1.23m | 7:16AM1.29m | ||||||||||||||||||
Low Tide | 00:22AM0.94m | 1:04PM-0.13m | 1:07AM0.96m | 1:55PM0.02m | 2:02AM0.96m | 2:50PM0.18m | ||||||||||||||||||
 |  | |  |  | | |  | | |  |  | |  | | |  | | | | | | | | |
 | — | — | — | 4:31 | — | — | — | — | — | — | — | 4:31 | — | — | — | — | — | — | — | 4:31 | — | — | — | — |
 | 6:37 | — | — | — | — | — | — | — | 6:38 | — | — | — | — | — | — | — | 6:39 | — | — | — | — | — | — | 6:39 |
— | — | — | — | — | — | — | — | — | — | 1 | 1 | — | 1 | 1 | 2 | 6 | 3 | 1 | 3 | 2 | 5 | 1 | 1 | |
Temp °C | 20 | 20 | 20 | 20 | 20 | 22 | 23 | 23 | 22 | 21 | 21 | 21 | 22 | 22 | 23 | 21 | 20 | 17 | 16 | 16 | 16 | 16 | 16 | 16 |
19 | 19 | 19 | 19 | 19 | 20 | 21 | 21 | 21 | 20 | 21 | 21 | 22 | 21 | 21 | 20 | 19 | 15 | 13 | 13 | 12 | 11 | 10 | 10 | |
Swell 1 Height (m) Direction Period (s) | E 10 | E 10 | SE 11 | SE 10 | SE 10 | SE 10 | SE 10 | ESE 10 | ESE 10 | SE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SSW 8 | SSW 8 | SSW 8 | S 7 | SSW 7 | SSW 7 | SSW 8 |
 kJ | 90 | 92 | 110 | 108 | 104 | 124 | 110 | 164 | 161 | 117 | 142 | 142 | 145 | 105 | 107 | 83 | 83 | 372 | 263 | 176 | 100 | 117 | 97 | 64 |
Swell 2 Height (m) Direction Period (s) | SE 11 | SE 11 | E 10 | E 10 | E 10 | E 10 | E 10 | NE 8 | NE 8 | E 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NE 7 | — | — | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 |
| kJ | 90 | 110 | 71 | 71 | 70 | 70 | 52 | 11 | 11 | 40 | 6 | 6 | 6 | 6 | 2 | — | — | 74 | 72 | 51 | 54 | 54 | 38 | 52 |
Swell 3 Height (m) Direction Period (s) | ENE 9 | NE 9 | NE 10 | SSE 5 | NE 9 | NE 8 | NE 8 | — | — | ENE 8 | S 8 | — | — | E 12 | — | NE 11 | NE 11 | E 11 | ESE 10 | ESE 10 | SW 8 | ESE 10 | ESE 10 | — |
| kJ | 8 | 13 | 14 | 12 | 12 | 11 | 11 | — | — | 6 | 1 | — | — | 3 | — | 5 | 5 | 2 | 71 | 52 | 31 | 54 | 54 | — |
Wind waves Height (m) Direction Period (s) | SSW 4 | SSW 4 | SSW 4 | SW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | S 5 | S 5 | SSW 6 | SSW 7 | SSW 7 | SSW 7 | SW 8 | NE 5 | NE 6 | NE 5 | NE 7 | NE 8 | NE 9 |
| kJ | 11 | 10 | 14 | 12 | 29 | 22 | 31 | 29 | 30 | 22 | 20 | 21 | 43 | 235 | 397 | 431 | 418 | 776 | 65 | 106 | 110 | 353 | 619 | 1174 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 126 | 96 | 96 | 96 | 96 | 231 | 540 | 540 | 184 | 96 | 96 | 96 | 35 | 75 | 30 | 29 | 24 | 117 | 519 | 279 | 190 | 537 | 558 | 554 |
Best forecast wave conditions in Chiba | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Amatu surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Nearest