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Surf Forecasts:
Katahama surfForecast / Shizuoka / Japan
48hr Weather and Surf, issued 8 pm Tuesday 21 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
17.6° C
(Which is 1.5°C colder than average for this time of year)How big are the waves at Katahama today?
The current surf forecast for Katahama at 4AM is: 0.9m 10s primary swell from a East-southeast direction and 1.1m 6s secondary swell from a East-southeast direction (forecast issued at 08:00pm April 21). An open ocean swell of 0.6m 5s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 Apr) | 5ft (1.6m) | 8s |
| Afternoon (22 Apr) | 4.5ft (1.4m) | 8s |
| Evening (22 Apr) | 3.5ft (1.1m) | 10s |
Table - waves today at Katahama. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Tue 21 | Wednesday 22 | Thursday 23 | Friday 24 | |||||||||||||||||||||
| 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) (?) | 11 | 11 | 10 | 10 | 7 | 8 | 8 | 8 | 10 | 10 | 10 | 10 | 10 | 7 | 7 | 8 | 9 | 9 | 10 | 6 | 6 | 6 | 7 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 265 | 256 | 346 | 191 | 355 | 319 | 220 | 231 | 275 | 235 | 214 | 175 | 163 | 61 | 48 | 44 | 92 | 64 | 29 | 66 | 109 | 116 | 195 | 263 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- on | cross- on | glass | on | on | cross- on | cross | cross- off | cross- off | cross- off | off | glass | cross- off | cross- off | cross | cross | cross- off | cross- off | cross- off | glass | cross- on | cross- on |
High Tide / height (m) | 8:37PM 1.29 | 7:22AM 1.42 | 9:47PM 1.22 | 8:04AM 1.29 | 11:33PM 1.20 | 9:07AM 1.15 | ||||||||||||||||||
Low Tide / height (m) | 1:44AM 0.89 | 2:41PM 0.23 | 2:48AM 0.97 | 3:46PM 0.34 | 4:48AM 1.02 | |||||||||||||||||||
Tue 21 | Wednesday 22 | Thursday 23 | Friday 24 | |||||||||||||||||||||
| Sunrise | - | - | - | - | 5:07 | - | - | - | - | - | - | - | 5:05 | - | - | - | - | - | - | - | 5:05 | - | - | - |
| Sunset | 6:22 | - | - | - | - | - | - | - | 6:23 | - | - | - | - | - | - | - | 6:23 | - | - | - | - | - | - | - |
 |  |  | | |  | | | |  | | |  | |  | |  |  | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | 5 | 9 | 5 | 3 | 2 | - | - | - | - |
| Temp. °C | 20 | 18 | 18 | 17 | 16 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 16 | 14 | 13 | 13 | 13 | 13 | 12 | 13 | 15 | 16 | 17 |
| Feels °C (?) | 10 | 15 | 16 | 15 | 15 | 16 | 15 | 16 | 16 | 16 | 17 | 15 | 16 | 15 | 12 | 11 | 9 | 8 | 8 | 9 | 11 | 14 | 14 | 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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