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Surf Forecasts:
Kugenuma Rivermouth surfForecast / Kanagawa / Japan
48hr Weather and Surf, issued 2 am Thursday 16 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
16.0° C
(Which is 2.1°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 South-southeast direction and 0.8m 18s secondary swell from a South-southeast direction (forecast issued at 02:00am April 16). An open ocean swell of 0.8m 4s is not directed at the surf break. The wind direction is predicted to be offshore and the swell rating is 4.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Apr) | 4ft (1.2m) | 14s |
| Afternoon (16 Apr) | 4.5ft (1.3m) | 15s |
| Evening (16 Apr) | 3.5ft (1.0m) | 14s |
Table - waves today at Kugenuma Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 16 | Friday 17 | Saturday 18 | ||||||||||||||||||||||
| 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) (?) | 15 | 14 | 14 | 14 | 16 | 15 | 14 | 14 | 15 | 16 | 15 | 15 | 15 | 14 | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 15 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 763 | 785 | 774 | 585 | 362 | 786 | 419 | 425 | 636 | 645 | 637 | 612 | 619 | 565 | 491 | 1011 | 1137 | 1123 | 1239 | 1096 | 1068 | 1093 | 1051 | 929 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | off | off | off | off | off | cross- off | cross- off | off | off | off | cross- off | cross- off | cross- off | cross- on | cross | cross- on | glass | glass | cross- on | on | cross- on | on | on |
High Tide / height (m) | 4:03AM 1.32 | 4:54PM 1.33 | 4:21AM 1.36 | 5:30PM 1.34 | 4:40AM 1.41 | 6:06PM 1.32 | ||||||||||||||||||
Low Tide / height (m) | 10:13PM 0.49 | 10:30AM 0.20 | 10:37PM 0.56 | 10:56AM 0.10 | 10:59PM 0.63 | 11:25AM 0.02 | ||||||||||||||||||
Thursday 16 | Friday 17 | Saturday 18 | ||||||||||||||||||||||
| Sunrise | - | - | 5:09 | - | - | - | - | - | - | - | 5:07 | - | - | - | - | - | - | - | 5:07 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:14 | - | - | - | - | - | - | - | 6:15 | - | - | - | - | - | - | - | 6:15 | - |
 |  |  |  |  | | |  | | | | | | | |  | |  | | | | | | | |
Rain (mm) | 9 | 2 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 15 | 15 | 16 | 18 | 22 | 22 | 16 | 13 | 12 | 11 | 10 | 11 | 15 | 17 | 15 | 13 | 13 | 13 | 13 | 14 | 16 | 17 | 16 | 16 |
| Feels °C (?) | 12 | 11 | 12 | 12 | 14 | 14 | 9 | 6 | 5 | 5 | 4 | 5 | 10 | 13 | 12 | 11 | 12 | 12 | 12 | 13 | 14 | 14 | 13 | 15 |
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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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