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Surf Forecasts:
Kugenuma Rivermouth surfForecast / Kanagawa / Japan
48hr Weather and Surf, issued 2 am Monday 13 Apr 2026 JSTForecast update in hr min s Forecast update imminent
Kugenuma Rivermouth surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Kugenuma Rivermouth sea temperature is
15.6° C
(Which is 2.3°C colder than average for this time of year)How big are the waves at Kugenuma Rivermouth today?
The current surf forecast for Kugenuma Rivermouth at 9AM is: 0.3m 11s primary swell from a Southeast direction and 0.4m 6s secondary swell from a South-southeast direction (forecast issued at 02:00am April 13). The wind direction is predicted to be glassy.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Apr) | 1ft (0.3m) | 11s |
| Afternoon (13 Apr) | 1ft (0.3m) | 11s |
| Evening (13 Apr) | 1ft (0.3m) | 11s |
Table - waves today at Kugenuma Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 13 | Tuesday 14 | Wednesday 15 | ||||||||||||||||||||||
| 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 | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    | |||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 6 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 11 | 12 | 12 | 13 | 17 | 17 | 16 | 16 | 15 | 15 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 39 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 31 | 43 | 44 | 48 | 50 | 198 | 72 | 73 | 79 | 381 | 243 | 532 | 724 | 702 | 826 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | on | glass | cross- on | cross- on | cross- on | cross- on | glass | glass | off | cross- off | cross- off | cross- on | cross- on | cross | cross | glass | glass | cross- on | on | on | cross- on | on |
High Tide / height (m) | 3:15AM 1.23 | 2:49PM 1.13 | 3:32AM 1.26 | 3:37PM 1.22 | 3:47AM 1.28 | 4:18PM 1.29 | ||||||||||||||||||
Low Tide / height (m) | 9:15AM 0.62 | 9:09PM 0.38 | 9:41AM 0.47 | 9:44PM 0.43 | 10:06AM 0.33 | |||||||||||||||||||
Monday 13 | Tuesday 14 | Wednesday 15 | ||||||||||||||||||||||
| Sunrise | - | - | 5:13 | - | - | - | - | - | - | - | 5:11 | - | - | - | - | - | - | - | 5:11 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:12 | - | - | - | - | - | - | - | 6:13 | - | - | - | - | - | - | - | 6:14 | - |
 | |  |  | | | |  | | |  | | | | | | |  | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 17 | 17 | 17 | 18 | 19 | 18 | 18 | 17 | 16 | 16 | 16 | 18 | 20 | 20 | 19 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 17 |
| Feels °C (?) | 15 | 16 | 17 | 18 | 18 | 16 | 17 | 17 | 17 | 17 | 15 | 16 | 19 | 17 | 16 | 16 | 17 | 18 | 18 | 16 | 16 | 16 | 17 | 16 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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