Surf Forecasts:
How big are the waves at Katahama today (20 Sep):
- Morning surf: Morning surf (20 Sep, local time) - 10ft (3.0m), 12s period with SE swell.
- Afternoon surf: Afternoon surf (20 Sep, local time) - 10ft (3.0m), 12s period with SE swell.
- Evening surf: Evening surf (20 Sep, local time) - 10ft (3.0m), 12s period with SE swell.
The current surf forecast for Katahama at 3AM is: 3.0m 13s primary swell from a Southeast direction (forecast issued at 08:00pm September 19). An open ocean swell of 2.0m 6s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 11.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Sep) | 10ft (3.0m) | 12s |
| Afternoon (20 Sep) | 10ft (3.0m) | 12s |
| Evening (20 Sep) | 10ft (3.0m) | 12s |
Table - waves today at Katahama. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 60mm), heaviest during Mon afternoon. Warm (max 29°C on Tue morning, min 22°C on Sun afternoon). Winds decreasing (strong winds from the NE on Mon afternoon, calm by Tue morning). | ||||||||||||||||||
Sat 19 | Sunday 20 | Monday 21 | ||||||||||||||||
6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | |
Swell Height Map |  |  |  |  |  |  |  | |||||||||||
Wave Height (m) Direction Period (s) | SE 13 | SE 13 | SE 13 | SE 13 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SSE 12 | SSE 13 | SSE 13 | SSE 13 | SSE 14 | SE 14 |
Wave Graph  | ||||||||||||||||||
 kJ | 3420 | 3502 | 3422 | 3018 | 2622 | 2724 | 2635 | 2684 | 2875 | 2648 | 3258 | 3867 | 4224 | 5352 | 6289 | 6608 | 12337 | 12427 |
Wind (km/h) | ||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross-off | cross | cross | cross | cross | cross | cross | cross-off | cross | cross | cross | cross | cross | cross-off | cross-off |
High Tide | 9:42PM1.39m | 2:57PM1.42m | 00:31AM1.31m | 3:33PM1.51m | ||||||||||||||
Low Tide | 4:45PM1.27m | 6:32AM0.65m | 8:29PM1.23m | 8:06AM0.62m | ||||||||||||||
 | |  | |  | | | |  |  | |  |  |  | | |  | | |
 | — | — | — | 5:31 | — | — | — | — | — | — | — | 5:33 | — | — | — | — | — | — |
 | — | — | — | — | — | — | — | 5:47 | — | — | — | — | — | — | — | 5:45 | — | — |
mm | — | — | — | — | 1 | 1 | 5 | 3 | 7 | 2 | 7 | 1 | — | 1 | 1 | 1 | 16 | 8 |
Temp °C | 25 | 25 | 25 | 24 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 23 | 24 | 24 | 26 | 26 | 24 | 24 |
Feels °C | 25 | 25 | 26 | 25 | 22 | 21 | 21 | 21 | 20 | 20 | 20 | 21 | 22 | 22 | 24 | 23 | 23 | 25 |
Swell 1 Height (m) Direction Period (s) | SE 13 | SE 13 | SE 13 | SE 13 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SSE 12 | SSE 13 | SSE 13 | SSE 13 | SSE 14 | SE 14 |
| kJ | 3420 | 3502 | 3422 | 3018 | 2622 | 2724 | 2635 | 2684 | 2875 | 2648 | 3258 | 3867 | 4224 | 5352 | 6289 | 6608 | 12337 | 12427 |
Swell 2 Height (m) Direction Period (s) | S 9 | — | — | — | — | — | — | SSE 14 | E 13 | E 13 | E 13 | E 12 | E 12 | E 12 | — | — | — | E 10 |
| kJ | 2 | — | — | — | — | — | — | 350 | 13 | 14 | 13 | 28 | 25 | 43 | — | — | — | 1175 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | E 13 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | 4 | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | E 6 | ENE 7 | ENE 7 | ENE 6 | ENE 6 | ENE 7 | NNE 5 | E 8 | NE 6 | NE 5 | ENE 9 | ENE 8 | — | ENE 7 | ENE 6 | ENE 6 | NE 6 | NNE 6 |
| kJ | 206 | 532 | 350 | 312 | 355 | 498 | 24 | 1142 | 72 | 60 | 905 | 709 | — | 505 | 270 | 461 | 331 | 205 |
Nearest Offshore or Glassy | ||||||||||||||||||
Distance (km) | 132 | 132 | 132 | 2 | 352 | 415 | 415 | 415 | 415 | 415 | 202 | 373 | 415 | 430 | 373 | 373 | 373 | 369 |
Best forecast wave conditions in Shizuoka | ||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||
Header Global | ||||||||||||||||||
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Live Wave Height (m)
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Surf Rating (10 Max)
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