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Kuminatu surfForecast / Chiba / Japan
48hr Weather and Surf, issued 8 am Sunday 12 Oct 2025 JST
How big are the waves at Kuminatu today?
The current surf forecast for Kuminatu at 3PM is: 1.4m 8s primary swell from a South direction and 0.5m 9s secondary swell from a East direction (forecast issued at 08:00am October 12). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Oct) | 5ft (1.6m) | 8s |
| Afternoon (12 Oct) | 4.5ft (1.4m) | 8s |
| Evening (12 Oct) | 4ft (1.2m) | 7s |
Table - waves today at Kuminatu. (Swell directed towards the surf break)
Sunday 12 | Monday 13 | Tuesday 14 | Wed 15 | |||||||||||||||||||||
| 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 0 AM | 3 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 7 | 8 | 8 | 8 | 7 | 7 | 10 | 9 | 12 | 13 | 13 | 12 | 11 | 10 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 188 | 300 | 300 | 221 | 186 | 146 | 299 | 125 | 444 | 787 | 2380 | 2027 | 1331 | 788 | 459 | 348 | 360 | 368 | 339 | 329 | 288 | 344 | 409 | 400 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | cross- on | cross- on | cross- on | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | glass | cross- off | cross- off |
High Tide / height (m) | 8:46AM 1.29 | 6:36PM 1.54 | 10:19AM 1.20 | 7:07PM 1.45 | 1:03PM 1.20 | 7:49PM 1.32 | ||||||||||||||||||
Low Tide / height (m) | 12:56PM 1.07 | 2:23AM 0.23 | 1:20PM 1.14 | 3:35AM 0.36 | 1:59PM 1.20 | |||||||||||||||||||
Sunday 12 | Monday 13 | Tuesday 14 | Wed 15 | |||||||||||||||||||||
| Sunrise | 5:41 | - | - | - | - | - | - | - | 5:41 | - | - | - | - | - | - | - | 5:43 | - | - | - | - | - | - | - |
| Sunset | - | - | - | 5:08 | - | - | - | - | - | - | - | 5:07 | - | - | - | - | - | - | - | 5:06 | - | - | - | - |
 |  | | |  |  |  | |  | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | 2 | 1 | 1 | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | 1 | - |
| Temp. °C | 18 | 20 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 21 | 20 | 20 | 20 | 20 | 21 | 21 | 22 | 21 | 21 | 19 | 18 |
| Feels °C (?) | 20 | 21 | 24 | 25 | 25 | 25 | 26 | 24 | 22 | 20 | 19 | 18 | 17 | 16 | 17 | 18 | 18 | 19 | 19 | 21 | 21 | 24 | 18 | 17 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for Chiba
Continuing clean conditions at Kuminatu (calm at Katsuura 7 km from Kuminatu). 1.2m 7s swell from the SSE with a 0.7m 9s swell from the E and a 0.3m 13s groundswell from the SW. 3 swells combining to make bigger set waves.
Actual: 37 min ago
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