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Surf Forecasts:
Kugenuma Rivermouth surfForecast / Kanagawa / Japan
48hr Weather and Surf, issued 2 am Monday 11 May 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
20.8° C
(Which is slightly warmer than usual)How big are the waves at Kugenuma Rivermouth today?
The current surf forecast for Kugenuma Rivermouth at 5AM is: 0.9m 6s primary swell from a South-southeast direction and 0.6m 6s secondary swell from a South-southeast direction, 0.1m 8s secondary swell from a Southeast direction (forecast issued at 02:00am May 11). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (11 May) | 2ft (0.6m) | 6s |
| Afternoon (11 May) | 2.5ft (0.8m) | 4s |
| Evening (11 May) | 1.5ft (0.5m) | 10s |
Table - waves today at Kugenuma Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 20°C on Wed afternoon, min 17°C on Mon night). Winds decreasing (fresh winds from the S on Mon afternoon, calm by Tue night). | ||||||||||||||||||||||||
Monday 11 | Tuesday 12 | Wednesday 13 | ||||||||||||||||||||||
12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
SSE 6 | SSE 6 | SSE 6 | S 6 | S 5 | S 4 | S 4 | SE 10 | SSE 8 | SSE 9 | SSE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 10 | |
29 | 45 | 25 | 23 | 36 | 22 | 22 | 48 | 123 | 65 | 67 | 81 | 86 | 68 | 65 | 67 | 52 | 51 | 40 | 40 | 29 | 29 | 30 | 33 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | on | on | cross-on | on | on | on | on | on | on | cross-on | on | on | on | cross-on | on | glassy | glassy | glassy | cross-on | on | on | on | |
High Tide | 1:23AM1.20m | 1:22PM1.01m | 1:56AM1.24m | 2:41PM1.10m | 2:23AM1.27m | 3:36PM1.19m | ||||||||||||||||||
Low Tide | 7:58AM0.67m | 7:30PM0.57m | 8:36AM0.50m | 8:23PM0.63m | 9:09AM0.35m | |||||||||||||||||||
 | |  |  | | | |  | | | | | | | | | | | |  | | | | | |
 | — | 4:41 | — | — | — | — | — | — | — | 4:41 | — | — | — | — | — | — | — | 4:39 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 6:35 | — | — | — | — | — | — | — | 6:36 | — | — | — | — | — | — | — | 6:37 | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 18 | 18 | 17 | 18 | 19 | 19 | 18 | 18 | 17 | 17 | 17 | 18 | 19 | 19 | 18 | 18 | 17 | 17 | 17 | 18 | 19 | 20 | 19 | 19 |
15 | 16 | 15 | 15 | 14 | 14 | 13 | 14 | 14 | 15 | 16 | 17 | 17 | 16 | 15 | 17 | 16 | 18 | 17 | 18 | 18 | 18 | 17 | 18 | |
Swell 1 Height (m) Direction Period (s) | SE 9 | SSE 6 | SSE 6 | SE 11 | ESE 11 | ESE 11 | ESE 11 | ESE 10 | SSE 8 | SSE 9 | SSE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 10 |
 kJ | 3 | 27 | 25 | 5 | 11 | 11 | 11 | 11 | 123 | 65 | 67 | 81 | 86 | 68 | 65 | 67 | 52 | 51 | 40 | 40 | 29 | 29 | 30 | 33 |
Swell 2 Height (m) Direction Period (s) | SE 11 | SE 9 | SE 8 | SE 8 | — | — | — | SE 10 | ESE 10 | — | — | — | — | — | — | — | — | — | S 9 | — | SE 11 | SE 11 | — | SE 11 |
| kJ | 5 | 3 | 3 | 3 | — | — | — | 48 | 18 | — | — | — | — | — | — | — | — | — | 2 | — | 5 | 5 | — | 5 |
Swell 3 Height (m) Direction Period (s) | — | SE 11 | SE 11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 5 | 5 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | SSE 6 | SSE 6 | — | S 6 | S 5 | S 4 | S 4 | S 4 | SSE 8 | — | — | — | — | S 3 | S 3 | — | — | — | — | — | — | — | S 3 | — |
| kJ | 29 | 45 | — | 23 | 36 | 22 | 22 | 18 | 70 | — | — | — | — | 2 | 2 | — | — | — | — | — | — | — | 1 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 64 | 85 | 30 | 30 | 84 | 85 | 85 | 85 | 85 | 84 | 7 | 30 | 7 | 26 | 49 | 49 | 49 | 45 | 2 | 2 | 2 | 24 | 24 | 26 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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