Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
Kugenuma Rivermouth surfForecast / Kanagawa / Japan
48hr Weather and Surf, issued 8 pm Thursday 01 Jan 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
17.2° C
(Which is slightly cooler than normal)How big are the waves at Kugenuma Rivermouth today?
The current surf forecast for Kugenuma Rivermouth at 12AM is: 0.1m 14s primary swell from a East direction and 0.1m 5s secondary swell from a Southwest direction, 0.1m 8s secondary swell from a Southwest direction (forecast issued at 08:00pm January 01). An open ocean swell of 0.3m 2s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (02 Jan) | - | - |
| Afternoon (02 Jan) | - | - |
| Evening (02 Jan) | 0.5ft (0.1m) | 8s |
Table - waves today at Kugenuma Rivermouth. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thu 01 | Friday 02 | Saturday 03 | Sunday 04 | |||||||||||||||||||||
| 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) (?) | 4 | 8 | 14 | 8 | 5 | 5 | 4 | 4 | 5 | 5 | 8 | 8 | 9 | 9 | 8 | 9 | 8 | 8 | 9 | 9 | 9 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 1 | 2 | 4 | 3 | 3 | 2 | 2 | 3 | 59 | 12 | 25 | 6 | 3 | 3 | 34 | 3 | 3 | 7 | 3 | 3 | 3 | 3 | 3 | 3 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | off | off | off | off | off | cross- off | cross- on | cross- on | off | off | cross- off | cross | cross | cross- on | on | glass | cross- off | cross- off | glass | cross- off | cross- off | glass | on |
High Tide / height (m) | 5:41AM 1.31 | 2:51PM 1.39 | 6:06AM 1.34 | 3:35PM 1.42 | 6:28AM 1.35 | |||||||||||||||||||
Low Tide / height (m) | 9:59PM 0.05 | 10:05AM 1.10 | 10:35PM -0.00 | 10:40AM 1.07 | 11:08PM -0.03 | 11:13AM 1.02 | ||||||||||||||||||
Thu 01 | Friday 02 | Saturday 03 | Sunday 04 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | 6:50 | - | - | - | - | - | - | - | 6:50 | - | - | - | - | - | - | - | 6:50 | - | - |
| Sunset | - | - | - | - | - | - | - | 4:39 | - | - | - | - | - | - | - | 4:40 | - | - | - | - | - | - | - | 4:42 |
 | | |  | |  | | |  |  | | |  |  | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | 2 | 3 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 9 | 9 | 7 | 7 | 6 | 5 | 6 | 7 | 6 | 2 | 3 | 4 | 4 | 5 | 7 | 8 | 8 | 8 | 7 | 6 | 6 | 6 | 8 | 9 |
| Feels °C (?) | 6 | 4 | 0 | 0 | 0 | -1 | 2 | 3 | -1 | -6 | -3 | -1 | 0 | 1 | 2 | 3 | 5 | 3 | 2 | 3 | 2 | 1 | 5 | 5 |
- 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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