Surf Forecasts:
How big are the waves at Rock Island today (19 Aug):
- Afternoon surf: Afternoon surf (19 Aug, local time) - 1ft (0.3m), 6s period with SSE swell.
- Evening surf: Evening surf (19 Aug, local time) - 0.5ft (0.2m), 6s period with SSE swell.
The current surf forecast for Rock Island at 6PM is: 0.1m 10s primary swell from a Southeast direction and 0.2m 6s secondary swell from a South-southeast direction, 0.3m 3s secondary swell from a South direction (forecast issued at 02:00pm August 19). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (19 Aug) | - | - |
| Afternoon (19 Aug) | 1ft (0.3m) | 6s |
| Evening (19 Aug) | 0.5ft (0.2m) | 6s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 27°C on Wed afternoon, min 25°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Wed 19 | Thursday 20 | Friday 21 | ||||||||||||||||||
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) | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSW 8 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSW 9 | SSW 9 | SSW 8 | S 10 | SSW 9 | SSW 9 | SSW 9 | S 9 | S 9 | SSW 9 | SSW 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 4 | 7 | 4 | 4 | 6 | 4 | 4 | 4 | 4 | 8 | 8 | 7 | 8 | 25 | 27 | 27 | 78 | 101 | 26 | 26 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | on | on | on | on | on | on | on | on | on |
High Tide | 8:32PM1.46m | 9:59AM1.24m | 9:00PM1.45m | 11:32AM1.17m | ||||||||||||||||
Low Tide | 2:29PM0.75m | 3:23AM0.45m | 3:00PM0.90m | 4:23AM0.44m | 3:34PM1.04m | |||||||||||||||
 |  | |  | | | | | | |  |  | |  | | | | | | | |
 | — | — | — | — | — | 5:03 | — | — | — | — | — | — | — | 5:05 | — | — | — | — | — | — |
 | — | — | 6:27 | — | — | — | — | — | — | — | 6:24 | — | — | — | — | — | — | — | 6:23 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 27 | 26 | 26 | 25 | 25 | 26 | 26 | 27 | 26 | 26 | 26 | 25 | 25 | 26 | 26 | 27 | 26 | 26 |
Feels °C | 29 | 28 | 28 | 28 | 29 | 28 | 28 | 29 | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 28 | 27 | 27 | 25 | 26 |
Swell 1 Height (m) Direction Period (s) | SSE 6 | SE 10 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SE 11 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SSW 9 | SSW 9 | SSW 9 | SE 10 | SE 11 | SSW 9 | SSW 9 |
| kJ | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 8 | 8 | 7 | 6 | 25 | 27 | 27 | 4 | 4 | 26 | 26 |
Swell 2 Height (m) Direction Period (s) | SE 6 | SW 8 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | S 9 | SE 11 | SE 11 | SE 11 | S 10 | SE 11 | SE 11 | SE 11 | SE 11 | S 9 | SE 11 | SE 10 |
| kJ | 2 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 2 | 4 | 4 | 4 | 8 | 4 | 4 | 4 | 30 | 2 | 4 | 4 |
Swell 3 Height (m) Direction Period (s) | SE 10 | SSW 8 | SW 8 | SW 8 | SSW 8 | SW 8 | SW 8 | SW 8 | SW 8 | E 6 | SE 6 | SE 6 | SE 11 | SE 5 | SE 6 | ESE 5 | SE 5 | ESE 5 | S 9 | S 9 |
| kJ | 4 | 6 | 2 | 2 | 6 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 4 | 1 | 1 | 3 | 1 | 3 | 2 | 2 |
Wind waves Height (m) Direction Period (s) | — | SSE 6 | S 3 | S 3 | — | — | — | — | SSE 6 | SSE 2 | S 3 | S 3 | S 3 | SSW 3 | SSW 3 | SSW 3 | S 9 | S 9 | S 4 | S 3 |
| kJ | — | 7 | 1 | 1 | — | — | — | — | 3 | 2 | 1 | 1 | 1 | 3 | 3 | 2 | 78 | 101 | 9 | 6 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 77 | 77 | 77 | 77 | 76 | 54 | 51 | 77 | 77 | 76 | 76 | 76 | 76 | 76 | 76 | 76 | 77 | 77 | 77 | 38 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
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