Surf Forecasts:
How big are the waves at Rock Island today (27 Aug):
- Afternoon surf: Afternoon surf (27 Aug, local time) - 1.5ft (0.4m), 11s period with S swell.
- Evening surf: Evening surf (27 Aug, local time) - 1.5ft (0.4m), 10s period with S swell.
The current surf forecast for Rock Island at 10PM is: 0.4m 10s primary swell from a South direction and 0.6m 6s secondary swell from a South direction (forecast issued at 02:00pm August 27). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (27 Aug) | - | - |
| Afternoon (27 Aug) | 1.5ft (0.4m) | 11s |
| Evening (27 Aug) | 1.5ft (0.4m) | 10s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 3mm), mostly falling on Thu afternoon. Warm (max 29°C on Thu afternoon, min 24°C on Sat night). Wind will be generally light. | ||||||||||||||||||||
Thu 27 | Friday 28 | Saturday 29 | ||||||||||||||||||
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) | S 11 | S 11 | SSW 5 | S 10 | S 10 | SW 5 | SSW 6 | SW 6 | SSW 6 | S 6 | S 8 | S 8 | S 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 38 | 35 | 56 | 30 | 29 | 59 | 31 | 80 | 22 | 22 | 48 | 33 | 32 | 20 | 20 | 20 | 12 | 12 | 12 | 12 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-off | glassy | on | cross-off | off | off | glassy | glassy | glassy | cross | cross-off | cross-off | cross-off | cross-off | glassy | cross-on | cross | off |
High Tide | 5:33PM1.46m | 4:32AM1.53m | 5:56PM1.47m | 5:19AM1.57m | 6:18PM1.49m | |||||||||||||||
Low Tide | 10:42AM0.22m | 10:57PM0.85m | 11:20AM0.24m | 11:30PM0.73m | 11:54AM0.30m | |||||||||||||||
 | |  |  |  |  | | | |  | | | | | | | | |  | | |
 | — | — | — | — | — | 5:09 | — | — | — | — | — | — | — | 5:11 | — | — | — | — | — | — |
 | — | — | 6:15 | — | — | — | — | — | — | — | 6:15 | — | — | — | — | — | — | — | 6:14 | — |
mm | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — |
Temp °C | 28 | 29 | 27 | 27 | 27 | 26 | 26 | 26 | 27 | 28 | 28 | 28 | 26 | 26 | 26 | 26 | 27 | 27 | 26 | 24 |
Feels °C | 32 | 31 | 27 | 30 | 28 | 28 | 29 | 28 | 30 | 31 | 30 | 31 | 29 | 29 | 28 | 28 | 30 | 30 | 29 | 24 |
Swell 1 Height (m) Direction Period (s) | S 6 | S 11 | SSW 5 | S 6 | S 10 | SSW 5 | SSW 6 | S 6 | SSW 6 | S 6 | S 8 | S 8 | S 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SSW 8 |
| kJ | 15 | 35 | 36 | 23 | 29 | 25 | 31 | 25 | 22 | 22 | 48 | 33 | 32 | 20 | 20 | 20 | 12 | 12 | 12 | 12 |
Swell 2 Height (m) Direction Period (s) | SSE 10 | SSE 10 | S 10 | S 10 | SSE 10 | S 9 | S 9 | S 9 | S 9 | S 8 | SSE 9 | SSE 9 | SSE 10 | SSE 9 | SSE 10 | SSE 11 | SSE 11 | SSE 11 | SSE 11 | SSE 11 |
| kJ | 38 | 18 | 31 | 30 | 18 | 27 | 25 | 14 | 13 | 12 | 8 | 9 | 9 | 8 | 11 | 11 | 11 | 12 | 12 | 11 |
Swell 3 Height (m) Direction Period (s) | S 11 | SW 10 | SSE 10 | SSE 10 | SSW 9 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | SW 9 | SW 9 | W 8 | SE 11 | — | — | — | SSW 8 | SSW 8 | SSW 8 |
| kJ | 37 | 15 | 18 | 18 | 9 | 17 | 9 | 8 | 8 | 8 | 3 | 3 | 1 | 5 | — | — | — | 6 | 6 | 6 |
Wind waves Height (m) Direction Period (s) | SSW 5 | SSW 6 | SSW 5 | — | S 6 | SW 5 | — | SW 6 | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 25 | 33 | 56 | — | 18 | 59 | — | 80 | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 18 | 14 | 0 | 0 | 77 | 0 | 0 | 0 | 16 | 16 | 0 | 54 | 38 | 51 | 51 | 51 | 16 | 92 | 51 | 54 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
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