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Surf Forecasts:
Kugenuma Rivermouth surfForecast / Kanagawa / Japan
48hr Weather and Surf, issued 2 am 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
17.5° C
(Which is slightly cooler than normal)How big are the waves at Kugenuma Rivermouth today?
The current surf forecast for Kugenuma Rivermouth at 10AM is: 0.5m 11s primary swell from a Southeast direction and 0.9m 4s secondary swell from a South direction (forecast issued at 02:00am April 21). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Apr) | 1.5ft (0.5m) | 11s |
| Afternoon (21 Apr) | 1.5ft (0.4m) | 11s |
| Evening (21 Apr) | 3.5ft (1.0m) | 6s |
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 | ||||||||||||||||||||||
| 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) (?) | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 6 | 6 | 6 | 7 | 8 | 8 | 4 | 4 | 4 | 4 | 4 | 5 | 7 | 7 | 6 | 3 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 209 | 180 | 86 | 60 | 59 | 41 | 328 | 59 | 85 | 20 | 102 | 36 | 10 | 14 | 21 | 16 | 12 | 7 | 6 | 9 | 6 | 6 | 6 | 6 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | on | on | on | on | off | cross- off | cross | cross | cross- on | on | cross- on | on | on | cross- on | on | on | cross- on | cross- off | off | off | glass | on | glass | cross- off |
High Tide / height (m) | 5:57AM 1.43 | 8:20PM 1.15 | 6:28AM 1.37 | 9:29PM 1.09 | 7:02AM 1.26 | |||||||||||||||||||
Low Tide / height (m) | 12:08AM 0.83 | 1:11PM 0.03 | 12:35AM 0.90 | 1:58PM 0.12 | 1:07AM 0.98 | 2:58PM 0.24 | ||||||||||||||||||
Tuesday 21 | Wednesday 22 | Thursday 23 | ||||||||||||||||||||||
| Sunrise | - | - | 5:03 | - | - | - | - | - | - | - | 5:01 | - | - | - | - | - | - | - | 5:01 | - | - | - | - | - |
| Sunset | - | - | - | - | - | - | 6:19 | - | - | - | - | - | - | - | 6:19 | - | - | - | - | - | - | - | 6:20 | - |
 | |  | | |  | | |  | | | |  | | | |  | | | | |  | |  | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 2 | 4 | 6 |
| Temp. °C | 18 | 17 | 17 | 18 | 21 | 22 | 20 | 17 | 16 | 16 | 16 | 17 | 18 | 18 | 18 | 18 | 17 | 18 | 17 | 17 | 17 | 14 | 13 | 13 |
| Feels °C (?) | 15 | 14 | 14 | 15 | 17 | 17 | 17 | 15 | 13 | 13 | 11 | 12 | 12 | 13 | 13 | 15 | 16 | 15 | 13 | 14 | 16 | 11 | 13 | 11 |
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