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Surf Forecasts:
Katahama surfForecast / Shizuoka / Japan
48hr Weather and Surf, issued 8 am Sunday 12 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
15.6° C
(Which is 2.9°C colder than average for this time of year)How big are the waves at Katahama today?
The current surf forecast for Katahama at 12PM is: 0.4m 11s primary swell from a East-southeast direction and 0.5m 3s secondary swell from a East direction (forecast issued at 08:00am April 12). An open ocean swell of 0.7m 7s is not directed at the surf break, a second open ocean swell of 0.6m 5s is not directed at the surf break. The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Apr) | 1.5ft (0.4m) | 11s |
| Afternoon (12 Apr) | 1.5ft (0.5m) | 11s |
| Evening (12 Apr) | 3.5ft (1.0m) | 6s |
Table - waves today at Katahama. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Sunday 12 | Monday 13 | Tuesday 14 | Wed 15 | |||||||||||||||||||||
| 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 | 0 AM | 3 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 11 | 11 | 11 | 11 | 6 | 6 | 10 | 10 | 10 | 11 | 11 | 10 | 10 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 12 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 46 | 46 | 45 | 56 | 62 | 76 | 54 | 54 | 54 | 75 | 75 | 36 | 55 | 92 | 90 | 115 | 138 | 151 | 148 | 122 | 151 | 202 | 247 | 255 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | off | glass | on | on | cross- on | cross- on | cross- off | cross- off | cross- off | glass | cross- on | cross | cross | glass | cross | glass | cross- off | cross- on | on | on | on | cross- on | cross | cross |
High Tide / height (m) | 3:01AM 1.33 | 2:29PM 1.15 | 3:29AM 1.38 | 3:23PM 1.25 | 3:53AM 1.42 | 4:04PM 1.33 | ||||||||||||||||||
Low Tide / height (m) | 9:15AM 0.75 | 8:52PM 0.43 | 9:46AM 0.61 | 9:36PM 0.43 | 10:13AM 0.48 | 10:10PM 0.45 | ||||||||||||||||||
Sunday 12 | Monday 13 | Tuesday 14 | Wed 15 | |||||||||||||||||||||
| Sunrise | 5:20 | - | - | - | - | - | - | - | 5:18 | - | - | - | - | - | - | - | 5:18 | - | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:15 | - | - | - | - | - | - | - | 6:15 | - | - | - | - | - | - | - | 6:16 | - | - | - |
 | | | | |  | | | |  | | | |  | | | | |  | | | |  | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 14 | 17 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 16 | 18 | 18 | 18 | 17 | 17 | 16 | 16 | 17 | 19 | 19 | 18 | 17 | 17 | 16 |
| Feels °C (?) | 11 | 15 | 15 | 13 | 14 | 15 | 16 | 14 | 14 | 17 | 17 | 16 | 17 | 16 | 16 | 16 | 16 | 16 | 18 | 16 | 15 | 14 | 16 | 14 |
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Katahama surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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