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Surf Forecasts:
Kugenuma Rivermouth surfForecast / Kanagawa / Japan
48hr Weather and Surf, issued 2 pm Tuesday 21 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
18.3° C
(Which is normal for this time of year)How big are the waves at Kugenuma Rivermouth today?
The current surf forecast for Kugenuma Rivermouth at 10PM is: 0.4m 11s primary swell from a Southeast direction and 0.1m 15s secondary swell from a Southeast direction, 0.6m 6s secondary swell from a South-southeast direction (forecast issued at 02:00pm April 21). The wind direction is predicted to be cross-shore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Apr) | - | - |
| Afternoon (21 Apr) | 1.5ft (0.4m) | 11s |
| Evening (21 Apr) | 1.5ft (0.4m) | 11s |
Table - waves today at Kugenuma Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | |||||||||||||||||||||
| 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 | 0 AM | 3 AM | 6 AM | 9 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 11 | 11 | 11 | 11 | 6 | 7 | 8 | 8 | 8 | 4 | 4 | 8 | 6 | 6 | 6 | 6 | 6 | 6 | 9 | 4 | 12 | 9 | 12 | 6 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 58 | 41 | 328 | 29 | 106 | 183 | 53 | 45 | 23 | 13 | 14 | 11 | 16 | 12 | 15 | 10 | 10 | 7 | 7 | 6 | 6 | 7 | 5 | 5 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | cross- off | cross- off | cross | cross- on | on | on | on | on | cross- on | on | on | cross- on | cross- off | off | off | cross- off | glass | off | cross- off | off | off | off | off |
High Tide / height (m) | 8:20PM 1.15 | 6:28AM 1.37 | 9:29PM 1.09 | 7:02AM 1.26 | 11:16PM 1.07 | 7:46AM 1.13 | ||||||||||||||||||
Low Tide / height (m) | 1:11PM 0.03 | 12:35AM 0.90 | 1:58PM 0.12 | 1:07AM 0.98 | 2:58PM 0.24 | 2:10AM 1.05 | ||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | 5:01 | - | - | - | - | - | - | - | 5:01 | - | - | - | - | - | - | - | 4:58 | - |
| Sunset | - | - | 6:19 | - | - | - | - | - | - | - | 6:19 | - | - | - | - | - | - | - | 6:20 | - | - | - | - | - |
 |  | |  |  | | | | |  | |  | | | | | | |  |  |  | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 5 | 7 | 5 | 3 | 2 | - |
| Temp. °C | 21 | 22 | 20 | 17 | 16 | 16 | 17 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 19 | 18 | 15 | 13 | 12 | 12 | 12 | 13 |
| Feels °C (?) | 18 | 18 | 17 | 14 | 13 | 13 | 13 | 13 | 11 | 12 | 13 | 15 | 15 | 14 | 13 | 13 | 17 | 17 | 15 | 7 | 3 | 4 | 4 | 6 |
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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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