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Surf Forecasts:
Kugenuma Rivermouth surfForecast / Kanagawa / Japan
48hr Weather and Surf, issued 8 pm Tuesday 09 Dec 2025 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
18.6° 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 1AM is: 0.1m 10s primary swell from a Southeast direction and 0.1m 8s secondary swell from a Southeast direction (forecast issued at 08:00pm December 09). The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (10 Dec) | 0.5ft (0.2m) | 10s |
| Afternoon (10 Dec) | 0.5ft (0.2m) | 11s |
| Evening (10 Dec) | 0.5ft (0.2m) | 11s |
Table - waves today at Kugenuma Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tue 09 | Wednesday 10 | Thursday 11 | Friday 12 | |||||||||||||||||||||
| 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) (?) | 9 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 4 | 5 | 6 | 6 | 7 | 7 | 8 | 8 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 3 | 4 | 4 | 4 | 4 | 11 | 11 | 11 | 12 | 11 | 12 | 12 | 11 | 11 | 11 | 16 | 107 | 206 | 251 | 106 | 35 | 16 | 6 | 4 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | glass | off | off | off | off | glass | cross | cross- off | off | off | off | off | glass | on | cross- on | cross- on | cross- on | cross- on | off | off | off | off | off |
High Tide / height (m) | 6:26PM 1.39 | 9:01AM 1.33 | 7:22PM 1.28 | 9:46AM 1.31 | 8:32PM 1.15 | 10:34AM 1.31 | ||||||||||||||||||
Low Tide / height (m) | 1:43AM 0.20 | 2:15PM 0.99 | 2:30AM 0.33 | 3:45PM 0.93 | 3:23AM 0.49 | |||||||||||||||||||
Tue 09 | Wednesday 10 | Thursday 11 | Friday 12 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 6:39 | - | - | - | - | - | - | - | 6:39 | - | - | - | - | - | - | - | 6:39 | - | - |
| Sunset | - | - | - | - | - | - | - | 4:29 | - | - | - | - | - | - | - | 4:29 | - | - | - | - | - | - | - | 4:30 |
 |  |  | | |  |  | | | | | | | | | | | | | | | |  | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 12 | 11 | 11 | 9 | 9 | 10 | 11 | 12 | 12 | 12 | 11 | 10 | 9 | 10 | 13 | 15 | 14 | 14 | 13 | 11 | 7 | 7 | 8 | 8 |
| Feels °C (?) | 8 | 8 | 6 | 4 | 4 | 6 | 8 | 9 | 9 | 8 | 7 | 6 | 5 | 8 | 7 | 6 | 5 | 3 | 2 | 5 | -5 | -4 | -1 | 0 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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