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Surf Forecasts:
Katahama surfForecast / Shizuoka / Japan
48hr Weather and Surf, issued 8 am Wednesday 15 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
16.2° C
(Which is 2.5°C colder than average for this time of year)How big are the waves at Katahama today?
The current surf forecast for Katahama at 5PM is: 1.9m 16s primary swell from a Southeast direction and 1.0m 8s secondary swell from a East-southeast direction (forecast issued at 08:00am April 15). An open ocean swell of 0.2m 6s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 4.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Apr) | 3.5ft (1.0m) | 17s |
| Afternoon (15 Apr) | 5ft (1.5m) | 16s |
| Evening (15 Apr) | 6ft (1.9m) | 16s |
Table - waves today at Katahama. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 15 | Thursday 16 | Friday 17 | Sat 18 | |||||||||||||||||||||
| 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) (?) | 18 | 17 | 16 | 16 | 16 | 16 | 15 | 15 | 14 | 15 | 16 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 15 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 390 | 601 | 1611 | 1184 | 1829 | 1672 | 1958 | 1297 | 1261 | 1350 | 1479 | 1332 | 1208 | 1191 | 1072 | 899 | 899 | 886 | 886 | 886 | 899 | 1038 | 1117 | 1275 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross | cross- on | cross- off | cross- off | cross- off | off | glass | glass | cross | cross- on | on | cross- on | cross | cross- off | cross | cross | on | on | on | on | cross- on | glass |
High Tide / height (m) | 4:14AM 1.46 | 4:40PM 1.40 | 4:34AM 1.50 | 5:14PM 1.44 | 4:55AM 1.54 | 5:47PM 1.46 | ||||||||||||||||||
Low Tide / height (m) | 10:38AM 0.36 | 10:38PM 0.49 | 11:02AM 0.25 | 11:03PM 0.54 | 11:28AM 0.15 | 11:28PM 0.59 | ||||||||||||||||||
Wednesday 15 | Thursday 16 | Friday 17 | Sat 18 | |||||||||||||||||||||
| Sunrise | 5:16 | - | - | - | - | - | - | - | 5:15 | - | - | - | - | - | - | - | 5:13 | - | - | - | - | - | - | - |
| Sunset | - | - | - | - | 6:17 | - | - | - | - | - | - | - | 6:19 | - | - | - | - | - | - | - | 6:20 | - | - | - |
 | |  | |  |  |  |  | | | |  | |  | | | | | | | |  | | | |
Rain (mm) | - | - | - | - | 6 | 8 | 3 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 16 | 17 | 18 | 19 | 15 | 14 | 15 | 15 | 15 | 17 | 18 | 18 | 17 | 15 | 13 | 13 | 12 | 13 | 14 | 15 | 14 | 14 | 13 | 13 |
| Feels °C (?) | 14 | 14 | 15 | 16 | 13 | 11 | 13 | 14 | 15 | 17 | 17 | 16 | 14 | 13 | 10 | 11 | 9 | 11 | 11 | 12 | 11 | 12 | 12 | 12 |
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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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