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Surf Forecasts:
Kugenuma Rivermouth surfForecast / Kanagawa / Japan
48hr Weather and Surf, issued 2 am Monday 20 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
17.3° C
(Which is 1.0°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 6AM is: 1.4m 14s primary swell from a Southeast direction (forecast issued at 02:00am April 20). The wind direction is predicted to be cross-offshore and the swell rating is 3.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Apr) | 4.5ft (1.3m) | 13s |
| Afternoon (20 Apr) | 3.5ft (1.1m) | 13s |
| Evening (20 Apr) | 3ft (0.9m) | 12s |
Table - waves today at Kugenuma Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Monday 20 | Tuesday 21 | Wednesday 22 | ||||||||||||||||||||||
| 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) (?) | 14 | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 6 | 7 | 7 | 8 | 8 | 3 | 5 | 5 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 947 | 834 | 711 | 577 | 444 | 374 | 256 | 248 | 141 | 139 | 86 | 77 | 58 | 41 | 29 | 29 | 44 | 78 | 24 | 32 | 25 | 8 | 23 | 15 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | cross- off | cross- on | cross- on | cross- on | cross- on | on | on | on | cross- on | off | cross- off | cross | cross- off | cross- on | cross- on | on | on | on | cross- on | on | cross- on |
High Tide / height (m) | 5:29AM 1.45 | 7:28PM 1.22 | 5:57AM 1.43 | 8:20PM 1.15 | 6:28AM 1.37 | |||||||||||||||||||
Low Tide / height (m) | 11:43PM 0.77 | 12:31PM -0.02 | 12:08AM 0.83 | 1:11PM 0.03 | 12:35AM 0.90 | 1:58PM 0.12 | ||||||||||||||||||
Monday 20 | Tuesday 21 | Wednesday 22 | ||||||||||||||||||||||
| Sunrise | - | - | 5:03 | - | - | - | - | - | - | - | 5:03 | - | - | - | - | - | - | - | 5:01 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:17 | - | - | - | - | - | - | - | 6:19 | - | - | - | - | - | - | - | 6:19 | - |
 | |  | | |  | |  | | | | | | | | | |  | |  | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 17 | 16 | 16 | 17 | 19 | 19 | 18 | 18 | 17 | 17 | 16 | 18 | 20 | 21 | 21 | 17 | 16 | 15 | 16 | 17 | 18 | 18 | 19 | 19 |
| Feels °C (?) | 17 | 16 | 16 | 16 | 18 | 16 | 15 | 15 | 14 | 15 | 13 | 16 | 17 | 18 | 19 | 15 | 14 | 12 | 13 | 13 | 14 | 15 | 16 | 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)
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