Surf Forecasts:
How big are the waves at Rock Island today (12 Jun):
- Morning surf: Morning surf (12 Jun, local time) - 2ft (0.6m), 8s period with S swell.
- Afternoon surf: Afternoon surf (12 Jun, local time) - 2ft (0.6m), 7s period with S swell.
- Evening surf: Evening surf (12 Jun, local time) - 1ft (0.3m), 8s period with SSW swell.
The current surf forecast for Rock Island at 7AM is: 0.4m 9s primary swell from a South-southwest direction and 0.5m 7s secondary swell from a South direction (forecast issued at 02:00am June 12). The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Jun) | 2ft (0.6m) | 8s |
| Afternoon (12 Jun) | 2ft (0.6m) | 7s |
| Evening (12 Jun) | 1ft (0.3m) | 8s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 7mm), mostly falling on Fri night. Warm (max 23°C on Fri afternoon, min 19°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Friday 12 | Saturday 13 | Sunday 14 | ||||||||||||||||||||||
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 | 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 7 | SSW 9 | SSW 9 | S 8 | SSW 8 | S 7 | S 7 | SSW 8 | SSW 8 | SSW 10 | SSE 6 | SSE 6 | SSE 6 | S 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | S 6 | S 6 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 54 | 30 | 29 | 46 | 27 | 35 | 31 | 13 | 12 | 20 | 14 | 14 | 13 | 24 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 12 | 20 | 4 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-off | glassy | on | on | on | on | off | off | off | off | cross | on | on | on | on | glassy | glassy | cross-on | on | on | on | cross-on |
High Tide | 1:35AM1.33m | 3:50PM1.23m | 2:13AM1.37m | 4:47PM1.30m | 2:52AM1.41m | 5:35PM1.36m | ||||||||||||||||||
Low Tide | 8:48AM0.26m | 8:44PM0.90m | 9:33AM0.13m | 9:36PM0.96m | 10:15AM0.03m | |||||||||||||||||||
 |  |  |  |  | | |  | | | | | | | | | | | | | | | |  | |
 | — | 4:26 | — | — | — | — | — | — | — | 4:26 | — | — | — | — | — | — | — | 4:26 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 6:55 | — | — | — | — | — | — | — | 6:57 | — | — | — | — | — | — | — | 6:57 | — |
mm | 1 | — | — | — | 1 | — | 1 | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 20 | 20 | 21 | 22 | 22 | 23 | 23 | 22 | 20 | 19 | 21 | 23 | 23 | 23 | 22 | 22 | 21 | 21 | 22 | 23 | 23 | 22 | 21 |
Feels °C | 20 | 21 | 20 | 22 | 22 | 21 | 22 | 23 | 22 | 18 | 17 | 20 | 24 | 22 | 22 | 21 | 23 | 22 | 22 | 23 | 22 | 22 | 21 | 21 |
Swell 1 Height (m) Direction Period (s) | S 7 | S 7 | S 7 | S 8 | SSE 7 | SW 8 | SSW 8 | SSW 8 | S 4 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SSW 8 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 6 | SSE 6 | SW 7 | SW 7 | SE 10 | S 6 |
| kJ | 54 | 24 | 26 | 46 | 16 | 11 | 13 | 13 | 2 | 12 | 12 | 12 | 11 | 6 | 9 | 9 | 9 | 9 | 8 | 8 | 2 | 2 | 4 | 3 |
Swell 2 Height (m) Direction Period (s) | SSW 9 | SSW 9 | SSW 9 | SSE 7 | SSW 8 | SSE 6 | SSE 7 | SSE 6 | SSW 8 | SSW 10 | SSW 8 | SSW 8 | SSW 8 | SE 7 | SSW 8 | SSW 8 | SW 8 | S 3 | SW 7 | SW 7 | E 10 | SE 10 | — | SE 10 |
| kJ | 31 | 30 | 29 | 31 | 27 | 16 | 17 | 4 | 12 | 20 | 14 | 14 | 13 | 2 | 6 | 6 | 2 | 1 | 2 | 2 | 2 | 4 | — | 4 |
Swell 3 Height (m) Direction Period (s) | E 7 | S 7 | E 7 | E 7 | E 7 | E 7 | E 7 | S 6 | SSE 6 | — | S 7 | SE 8 | SE 8 | SSE 7 | SE 8 | E 7 | E 8 | SW 7 | SW 8 | E 10 | — | E 15 | SSW 7 | — |
| kJ | 1 | 10 | 1 | 1 | 1 | 1 | 1 | 2 | 4 | — | 1 | 3 | 2 | 18 | 2 | 1 | 1 | 2 | 2 | 2 | — | 4 | 4 | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | S 7 | S 7 | S 3 | — | — | — | — | — | S 7 | S 3 | S 3 | S 3 | SSW 6 | — | — | SSE 6 | SSE 6 | S 6 | SSE 3 |
| kJ | — | — | — | — | — | 35 | 31 | 3 | — | — | — | — | — | 24 | 3 | 2 | 1 | 8 | — | — | 8 | 12 | 20 | 2 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 14 | 7 | 0 | 0 | 76 | 76 | 76 | 92 | 16 | 51 | 51 | 38 | 16 | 18 | 76 | 76 | 18 | 18 | 16 | 18 | 77 | 77 | 77 | 77 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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