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Surf Forecasts:
Kugenuma Rivermouth surfForecast / Kanagawa / Japan
48hr Weather and Surf, issued 2 am Saturday 18 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
17.0° C
(Which is 1.2°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 10AM is: 1.6m 16s primary swell from a South-southeast direction and 0.3m 11s secondary swell from a East direction (forecast issued at 02:00am April 18). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Apr) | 5ft (1.6m) | 16s |
| Afternoon (18 Apr) | 5ft (1.5m) | 16s |
| Evening (18 Apr) | 4.5ft (1.4m) | 15s |
Table - waves today at Kugenuma Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 18 | Sunday 19 | Monday 20 | ||||||||||||||||||||||
| 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) (?) | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 14 | 14 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1165 | 1255 | 1239 | 1224 | 1068 | 1041 | 845 | 822 | 869 | 857 | 845 | 899 | 911 | 911 | 961 | 961 | 947 | 934 | 799 | 681 | 451 | 380 | 320 | 269 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | glass | glass | on | cross- on | cross- on | cross- on | cross- on | glass | glass | off | cross- off | cross- off | cross- on | cross- on | cross- on | cross- off | cross- off | cross- off | cross- off | cross- off | cross- on | cross- on | cross- on |
High Tide / height (m) | 4:40AM 1.41 | 6:06PM 1.32 | 5:03AM 1.44 | 6:45PM 1.28 | 5:29AM 1.45 | 7:28PM 1.22 | ||||||||||||||||||
Low Tide / height (m) | 10:59PM 0.63 | 11:25AM 0.02 | 11:21PM 0.70 | 11:56AM -0.02 | 11:43PM 0.77 | 12:31PM -0.02 | ||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | ||||||||||||||||||||||
| Sunrise | - | - | 5:07 | - | - | - | - | - | - | - | 5:05 | - | - | - | - | - | - | - | 5:03 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:15 | - | - | - | - | - | - | - | 6:16 | - | - | - | - | - | - | - | 6:17 | - |
 | |  | | |  |  |  |  | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 13 | 13 | 13 | 15 | 16 | 17 | 17 | 17 | 16 | 16 | 16 | 18 | 20 | 21 | 19 | 17 | 17 | 17 | 16 | 17 | 19 | 19 | 18 | 17 |
| Feels °C (?) | 12 | 12 | 12 | 14 | 13 | 14 | 15 | 17 | 16 | 16 | 15 | 17 | 18 | 19 | 17 | 17 | 16 | 16 | 15 | 15 | 17 | 16 | 14 | 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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