Surf Forecasts:
How big are the waves at Katahama today (21 Aug):
- Morning surf: Morning surf (21 Aug, local time) - 1.5ft (0.4m), 11s period with SE swell.
- Afternoon surf: Afternoon surf (21 Aug, local time) - 1.5ft (0.4m), 11s period with SE swell.
- Evening surf: Evening surf (21 Aug, local time) - 1.5ft (0.4m), 11s period with SE swell.
The current surf forecast for Katahama at 4AM is: 0.4m 11s primary swell from a Southeast direction and 0.4m 9s secondary swell from a East-southeast direction (forecast issued at 08:00pm August 20). An open ocean swell of 0.7m 9s is not directed at the surf break. The wind direction is predicted to be glassy.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Aug) | 1.5ft (0.4m) | 11s |
| Afternoon (21 Aug) | 1.5ft (0.4m) | 11s |
| Evening (21 Aug) | 1.5ft (0.4m) | 11s |
Table - waves today at Katahama. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 2mm), mostly falling on Thu night. Warm (max 28°C on Fri afternoon, min 25°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Thu 20 | Friday 21 | Saturday 22 | ||||||||||||||||
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 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 13 | SE 14 | SE 13 | E 10 | E 11 | E 11 |
Wave Graph  | ||||||||||||||||||
 kJ | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 30 | 31 | 31 | 49 | 47 | 47 | 102 | 112 | 112 |
Wind (km/h) | ||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | glassy | cross-off | cross-off | cross | cross-on | cross | cross | cross-off | cross-off | cross-off | cross-off | cross | cross | cross | cross | cross |
High Tide | 9:40PM1.54m | 1:49PM1.24m | 10:40PM1.45m | 3:42PM1.37m | ||||||||||||||
Low Tide | 3:23PM1.06m | 5:36AM0.65m | 4:29PM1.22m | 7:17AM0.62m | 7:59PM1.28m | |||||||||||||
 |  |  | |  |  | | | |  | | | | | | | | | |
 | — | — | — | 5:11 | — | — | — | — | — | — | — | 5:11 | — | — | — | — | — | — |
 | 6:30 | — | — | — | — | — | — | — | 6:29 | — | — | — | — | — | — | — | 6:27 | — |
mm | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 26 | 26 | 26 | 25 | 27 | 27 | 28 | 27 | 26 | 26 | 26 | 25 | 27 | 28 | 28 | 27 | 27 |
Feels °C | 30 | 31 | 30 | 30 | 29 | 30 | 28 | 29 | 30 | 29 | 29 | 30 | 29 | 30 | 30 | 30 | 30 | 31 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 8 | S 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 |
| kJ | 35 | 51 | 78 | 84 | 108 | 106 | 106 | 113 | 146 | 166 | 163 | 149 | 146 | 130 | 146 | 119 | 119 | 116 |
Swell 2 Height (m) Direction Period (s) | SE 6 | SE 6 | SE 11 | ESE 9 | SE 11 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | SE 11 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 11 | E 11 |
| kJ | 9 | 9 | 30 | 26 | 30 | 26 | 28 | 28 | 28 | 30 | 16 | 30 | 49 | 47 | 47 | 102 | 112 | 112 |
Swell 3 Height (m) Direction Period (s) | SE 11 | SE 11 | SE 6 | SE 11 | E 9 | SE 11 | SE 11 | SE 11 | SE 11 | E 9 | SE 11 | SE 11 | SE 13 | SE 14 | SE 13 | SSE 10 | SSE 10 | ESE 10 |
| kJ | 30 | 30 | 8 | 30 | 14 | 30 | 30 | 30 | 29 | 16 | 31 | 31 | 45 | 46 | 42 | 10 | 9 | 11 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | SSW 2 | SSW 3 | — | — | — | — | — | SW 2 | SW 3 | SW 3 | SW 3 |
| kJ | — | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | 1 | 3 | 3 | 2 |
Nearest Offshore or Glassy | ||||||||||||||||||
Distance (km) | 208 | 2 | 2 | 2 | 2 | 6 | 65 | 208 | 6 | 2 | 2 | 2 | 2 | 6 | 65 | 65 | 6 | 6 |
Best forecast wave conditions in Shizuoka | ||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||
Header Global | ||||||||||||||||||
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