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 5PM is: 0.4m 11s primary swell from a Southeast direction and 0.4m 9s secondary swell from a East-southeast direction, 0.3m 3s secondary swell from a South-southwest direction (forecast issued at 08:00am August 21). An open ocean swell of 0.9m 9s is not directed at the surf break. The wind direction is predicted to be cross-shore.
| 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 ForecastSome drizzle, heaviest during Sat afternoon. Warm (max 28°C on Fri morning, min 25°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||||||||
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 | 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 13 | SE 14 | E 10 | E 10 | E 11 | E 11 | E 11 | E 10 | E 10 | E 10 | SE 13 | ESE 12 | SE 12 | SSE 12 |
Wave Graph  | ||||||||||||||||||||||
 kJ | 30 | 30 | 30 | 30 | 29 | 30 | 31 | 31 | 49 | 49 | 68 | 71 | 112 | 112 | 108 | 71 | 47 | 71 | 45 | 49 | 73 | 98 |
Wind (km/h) | ||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross | cross-on | cross-on | cross | cross | cross-off | cross-off | cross-off | cross | cross | cross | cross | glassy | glassy | glassy | glassy | on | on | on | on | on |
High Tide | 1:49PM1.24m | 10:40PM1.45m | 3:42PM1.37m | 00:41AM1.39m | 4:19PM1.48m | |||||||||||||||||
Low Tide | 5:36AM0.65m | 4:29PM1.22m | 7:17AM0.62m | 7:59PM1.28m | 8:42AM0.55m | |||||||||||||||||
 | |  | | |  |  | | | | | |  | | |  | | | | | | | |
 | 5:11 | — | — | — | — | — | — | 5:11 | — | — | — | — | — | — | — | 5:11 | — | — | — | — | — | — |
 | — | — | — | — | 6:29 | — | — | — | — | — | — | — | 6:27 | — | — | — | — | — | — | — | 6:25 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 27 | 28 | 28 | 27 | 26 | 26 | 26 | 25 | 28 | 28 | 28 | 27 | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 26 | 26 |
Feels °C | 29 | 30 | 29 | 29 | 29 | 29 | 29 | 30 | 28 | 31 | 30 | 30 | 30 | 30 | 30 | 31 | 31 | 30 | 29 | 29 | 29 | 30 |
Swell 1 Height (m) Direction Period (s) | 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 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SW 9 |
| kJ | 108 | 106 | 106 | 113 | 146 | 166 | 163 | 149 | 158 | 146 | 146 | 130 | 130 | 127 | 113 | 111 | 86 | 82 | 80 | 94 | 101 | 81 |
Swell 2 Height (m) Direction Period (s) | SE 11 | ESE 9 | ESE 9 | ESE 9 | ESE 9 | E 9 | E 10 | E 10 | E 10 | E 10 | E 10 | E 10 | E 11 | E 11 | E 11 | E 10 | E 10 | E 10 | E 10 | ESE 12 | SE 12 | SSE 12 |
| kJ | 30 | 26 | 28 | 28 | 28 | 15 | 16 | 30 | 49 | 49 | 68 | 71 | 112 | 112 | 108 | 71 | 47 | 71 | 30 | 49 | 73 | 98 |
Swell 3 Height (m) Direction Period (s) | E 9 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 13 | SE 14 | SE 13 | SE 13 | SE 5 | SE 5 | ESE 10 | ESE 11 | ESE 11 | ESE 10 | SE 13 | E 10 | ESE 12 | ESE 12 |
| kJ | 14 | 30 | 30 | 30 | 29 | 30 | 31 | 31 | 45 | 46 | 42 | 42 | 6 | 6 | 11 | 25 | 22 | 21 | 45 | 30 | 49 | 49 |
Wind waves Height (m) Direction Period (s) | — | — | — | SSW 2 | SSW 3 | — | — | — | — | — | SW 2 | SW 3 | WSW 3 | SW 3 | WSW 3 | W 3 | — | — | ENE 2 | ESE 3 | ESE 3 | ESE 3 |
| kJ | — | — | — | 1 | 1 | — | — | — | — | — | 1 | 3 | 2 | 1 | 1 | 1 | — | — | 1 | 3 | 2 | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||||
Distance (km) | 2 | 6 | 65 | 65 | 6 | 6 | 2 | 2 | 2 | 6 | 65 | 65 | 6 | 2 | 2 | 2 | 2 | 13 | 132 | 103 | 104 | 2 |
Best forecast wave conditions in Shizuoka | ||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||
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