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Surf Forecasts:
Kugenuma Rivermouth surfForecast / Kanagawa / Japan
48hr Weather and Surf, issued 2 am Thursday 09 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
15.8° C
(Which is 1.9°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: 0.2m 8s primary swell from a South-southwest direction and 0.2m 7s secondary swell from a South-southeast direction, 0.3m 3s secondary swell from a South-southwest direction (forecast issued at 02:00am April 09). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (09 Apr) | 1ft (0.3m) | 8s |
| Afternoon (09 Apr) | 3.5ft (1.1m) | 5s |
| Evening (09 Apr) | 3.5ft (1.0m) | 5s |
Table - waves today at Kugenuma Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 09 | Friday 10 | Saturday 11 | ||||||||||||||||||||||
| 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) (?) | 8 | 8 | 8 | 8 | 4 | 5 | 5 | 5 | 4 | 5 | 6 | 6 | 7 | 7 | 8 | 9 | 9 | 9 | 9 | 8 | 7 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 13 | 7 | 6 | 9 | 27 | 56 | 75 | 47 | 34 | 66 | 175 | 228 | 262 | 355 | 1427 | 1480 | 897 | 781 | 297 | 560 | 214 | 348 | 133 | 122 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | cross- on | cross- on | on | on | on | on | on | on | on | on | on | on | on | on | cross- on | on | cross- on | cross | glass | cross- off | cross- on | glass | off |
High Tide / height (m) | 10:26PM 1.01 | 7:29AM 1.22 | 4:17AM 1.08 | 8:07AM 1.09 | 2:46AM 1.14 | 11:14AM 0.98 | ||||||||||||||||||
Low Tide / height (m) | 1:02AM 0.98 | 4:00PM 0.31 | 5:54AM 1.08 | 5:54PM 0.37 | 8:18AM 0.94 | 7:24PM 0.37 | ||||||||||||||||||
Thursday 09 | Friday 10 | Saturday 11 | ||||||||||||||||||||||
| Sunrise | - | - | 5:18 | - | - | - | - | - | - | - | 5:16 | - | - | - | - | - | - | - | 5:16 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:08 | - | - | - | - | - | - | - | 6:09 | - | - | - | - | - | - | - | 6:09 | - |
 |  |  | |  |  | |  |  | |  | | | | |  | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | 1 | 1 | 1 | 4 | 1 | 3 | 5 | 1 | - | - | - | - | - | - | - | - |
| Temp. °C | 13 | 13 | 13 | 14 | 16 | 16 | 16 | 16 | 15 | 15 | 16 | 16 | 17 | 17 | 18 | 18 | 18 | 18 | 17 | 18 | 21 | 21 | 21 | 19 |
| Feels °C (?) | 8 | 9 | 9 | 9 | 9 | 8 | 9 | 10 | 10 | 10 | 10 | 11 | 12 | 13 | 17 | 18 | 16 | 16 | 17 | 19 | 21 | 20 | 21 | 13 |
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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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