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Surf Forecasts:
Kugenuma Rivermouth surfForecast / Kanagawa / Japan
48hr Weather and Surf, issued 8 pm Tuesday 14 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
16.1° C
(Which is 2.0°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 1AM is: 0.5m 12s primary swell from a Southeast direction and 0.2m 16s secondary swell from a South-southeast direction (forecast issued at 08:00pm April 14). The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Apr) | 2.5ft (0.7m) | 17s |
| Afternoon (15 Apr) | 4.5ft (1.3m) | 16s |
| Evening (15 Apr) | 4.5ft (1.3m) | 15s |
Table - waves today at Kugenuma Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tue 14 | Wednesday 15 | Thursday 16 | Friday 17 | |||||||||||||||||||||
| 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 | 6 AM | 9 AM | 12 PM | 3 PM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |   |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 12 | 12 | 12 | 13 | 17 | 17 | 16 | 16 | 15 | 15 | 15 | 14 | 14 | 14 | 16 | 15 | 14 | 14 | 15 | 16 | 16 | 16 | 16 | 16 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 71 | 72 | 73 | 79 | 305 | 246 | 635 | 778 | 730 | 693 | 763 | 785 | 774 | 722 | 362 | 679 | 419 | 425 | 636 | 654 | 654 | 654 | 817 | 817 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross | cross | cross- off | off | cross- off | glass | cross | glass | cross- off | off | off | off | off | off | cross- off | cross- off | cross- off | cross- off | off | off | off | cross- off | cross |
High Tide / height (m) | 3:37PM 1.22 | 3:47AM 1.28 | 4:18PM 1.29 | 4:03AM 1.32 | 4:54PM 1.33 | 4:21AM 1.36 | ||||||||||||||||||
Low Tide / height (m) | 9:44PM 0.43 | 10:06AM 0.33 | 10:13PM 0.49 | 10:30AM 0.20 | 10:37PM 0.56 | 10:56AM 0.10 | ||||||||||||||||||
Tue 14 | Wednesday 15 | Thursday 16 | Friday 17 | |||||||||||||||||||||
| Sunrise | - | - | - | - | 5:11 | - | - | - | - | - | - | - | 5:09 | - | - | - | - | - | - | - | 5:07 | - | - | - |
| Sunset | 6:13 | - | - | - | - | - | - | - | 6:14 | - | - | - | - | - | - | - | 6:14 | - | - | - | - | - | - | - |
 |  |  | |  | | | |  |  | | | |  | | | |  | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | 2 | 5 | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 19 | 17 | 17 | 16 | 16 | 17 | 19 | 19 | 16 | 16 | 16 | 16 | 16 | 20 | 21 | 18 | 14 | 12 | 11 | 10 | 10 | 11 | 15 | 16 |
| Feels °C (?) | 17 | 16 | 16 | 15 | 15 | 15 | 18 | 18 | 17 | 15 | 12 | 12 | 12 | 12 | 12 | 9 | 7 | 6 | 5 | 3 | 4 | 5 | 10 | 12 |
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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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