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Surf Forecasts:
Katahama surfForecast / Shizuoka / Japan
48hr Weather and Surf, issued 8 pm Thursday 09 Apr 2026 JSTForecast update in hr min s Forecast update imminent
Katahama surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Katahama sea temperature is
15.0° C
(Which is 3.4°C colder than average for this time of year)How big are the waves at Katahama today?
The current surf forecast for Katahama at 2AM is: 1.3m 6s primary swell from a South-southeast direction and 0.4m 10s secondary swell from a Southeast direction, 0.3m 10s secondary swell from a East-southeast direction (forecast issued at 08:00pm April 09). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (10 Apr) | 1.5ft (0.4m) | 10s |
| Afternoon (10 Apr) | 1.5ft (0.4m) | 9s |
| Evening (10 Apr) | 1.5ft (0.4m) | 9s |
Table - waves today at Katahama. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thu 09 | Friday 10 | Saturday 11 | Sunday 12 | |||||||||||||||||||||
| 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) (?) | 8 | 10 | 5 | 6 | 7 | 10 | 10 | 9 | 9 | 9 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 31 | 31 | 48 | 159 | 319 | 35 | 18 | 26 | 28 | 32 | 46 | 47 | 46 | 46 | 45 | 46 | 57 | 57 | 57 | 57 | 57 | 57 | 56 | 45 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | glass | glass | cross- on | cross | cross | cross- off | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | off | off | glass | cross- on | on |
High Tide / height (m) | 1:12AM 1.16 | 10:06AM 1.09 | 2:22AM 1.25 | 1:02PM 1.06 | 3:01AM 1.33 | 2:29PM 1.15 | ||||||||||||||||||
Low Tide / height (m) | 4:45PM 0.39 | 6:15AM 1.02 | 6:25PM 0.45 | 8:27AM 0.90 | 7:52PM 0.44 | 9:15AM 0.75 | ||||||||||||||||||
Thu 09 | Friday 10 | Saturday 11 | Sunday 12 | |||||||||||||||||||||
| Sunrise | - | - | - | - | 5:22 | - | - | - | - | - | - | - | 5:22 | - | - | - | - | - | - | - | 5:20 | - | - | - |
| Sunset | 6:13 | - | - | - | - | - | - | - | 6:14 | - | - | - | - | - | - | - | 6:15 | - | - | - | - | - | - | - |
 |  |  | |  |  | | | |  |  | |  | | | | | |  | |  | | | | |
Rain (mm) | - | - | 1 | 1 | 8 | 11 | 20 | 13 | 31 | 4 | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 16 | 15 | 15 | 17 | 16 | 16 | 16 | 19 | 18 | 18 | 18 | 18 | 17 | 19 | 21 | 21 | 18 | 16 | 13 | 12 | 13 | 15 | 16 | 17 |
| Feels °C (?) | 14 | 15 | 15 | 14 | 14 | 16 | 16 | 14 | 17 | 16 | 14 | 14 | 12 | 13 | 13 | 12 | 9 | 8 | 8 | 8 | 10 | 13 | 15 | 15 |
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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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