Surf Forecasts:
How big are the waves at Rock Island today (21 Jun):
- Afternoon surf: Afternoon surf (21 Jun, local time) - 5.5ft (1.7m), 8s period with SSW swell.
- Evening surf: Evening surf (21 Jun, local time) - 3.5ft (1.0m), 7s period with SSW swell.
The current surf forecast for Rock Island at 10PM is: 1.0m 8s primary swell from a South-southwest direction and 0.2m 10s secondary swell from a South-southeast direction (forecast issued at 02:00pm June 21). The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Jun) | - | - |
| Afternoon (21 Jun) | 5.5ft (1.7m) | 8s |
| Evening (21 Jun) | 3.5ft (1.0m) | 7s |
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 6mm), mostly falling on Mon night. Warm (max 24°C on Sun afternoon, min 19°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
Sun 21 | Monday 22 | Tuesday 23 | Wed 24 | |||||||||||||||||||||
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 | 12 AM | 3 AM | 6 AM | 9 AM | |
Swell Height Map |  |  |  |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | SSW 7 | SSW 8 | SW 8 | SSW 7 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | S 7 | S 7 | SSW 7 | SSE 10 | SSE 10 | SE 10 | SSE 11 | SSE 11 | SSE 11 | SE 11 | SSE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 222 | 337 | 620 | 117 | 119 | 70 | 51 | 48 | 27 | 14 | 10 | 10 | 10 | 16 | 12 | 13 | 13 | 20 | 12 | 19 | 19 | 18 | 18 | 18 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | off | off | off | off | off | off | cross-off | cross-off | cross-off | off | off | off | off | off | off | glassy | on | cross | cross-off | cross-off | cross-off | cross-off |
High Tide | 10:04PM1.33m | 9:12AM1.19m | 10:40PM1.32m | 10:34AM1.11m | 11:18PM1.31m | |||||||||||||||||||
Low Tide | 3:02PM0.31m | 3:53AM0.80m | 3:47PM0.46m | 4:58AM0.71m | 4:37PM0.61m | 6:05AM0.59m | ||||||||||||||||||
 |  | |  | | | | | | | |  | | | | | | | |  |  | | | | |
 | — | — | — | — | — | 4:26 | — | — | — | — | — | — | — | 4:26 | — | — | — | — | — | — | — | 4:26 | — | — |
 | — | — | 6:59 | — | — | — | — | — | — | — | 6:59 | — | — | — | — | — | — | — | 7:00 | — | — | — | — | 7:00 |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | 2 | — | — | — | — | — | — | 1 | — | — | — |
Temp °C | 22 | 24 | 24 | 24 | 22 | 21 | 21 | 22 | 23 | 23 | 21 | 20 | 19 | 19 | 19 | 19 | 21 | 23 | 22 | 21 | 20 | 20 | 20 | 21 |
Feels °C | 25 | 27 | 25 | 23 | 19 | 19 | 19 | 21 | 23 | 24 | 19 | 19 | 18 | 17 | 17 | 17 | 21 | 24 | 22 | 22 | 20 | 20 | 20 | 21 |
Swell 1 Height (m) Direction Period (s) | SSW 6 | SSW 7 | SSW 7 | SSW 7 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | S 7 | SSE 10 | SSW 7 | SSE 3 | S 6 | S 6 | SSE 11 | SSE 11 | SSE 11 | SE 11 | SSE 11 | SE 11 | SE 11 | SE 11 | SE 11 | SE 11 |
| kJ | 60 | 108 | 139 | 117 | 119 | 70 | 51 | 48 | 27 | 10 | 9 | 2 | 6 | 3 | 12 | 13 | 13 | 20 | 12 | 19 | 19 | 18 | 18 | 18 |
Swell 2 Height (m) Direction Period (s) | SE 11 | SSE 9 | SSE 9 | SSE 9 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSW 8 | SSE 10 | SSE 10 | SSE 10 | SE 10 | S 6 | S 6 | S 6 | S 6 | S 6 | S 6 | S 5 | S 5 | S 5 | S 13 |
| kJ | 5 | 8 | 8 | 8 | 10 | 10 | 10 | 10 | 10 | 6 | 10 | 10 | 10 | 16 | 3 | 3 | 1 | 1 | 2 | 2 | 2 | 1 | 1 | 3 |
Swell 3 Height (m) Direction Period (s) | SE 9 | SE 11 | SE 11 | SE 11 | E 16 | E 10 | E 16 | E 10 | — | E 10 | E 10 | S 6 | SW 7 | SW 7 | SW 7 | SW 7 | SW 6 | SW 6 | S 10 | S 10 | S 10 | S 9 | S 14 | S 5 |
| kJ | 3 | 5 | 5 | 5 | 5 | 8 | 5 | 8 | — | 2 | 2 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 4 | 1 |
Wind waves Height (m) Direction Period (s) | SSW 7 | SSW 8 | SW 8 | — | — | NNE 3 | NNE 3 | — | — | S 7 | SSE 3 | — | — | NE 3 | NE 3 | NE 3 | NNE 3 | — | — | — | — | — | NE 2 | — |
| kJ | 222 | 337 | 620 | — | — | 1 | 1 | — | — | 14 | 3 | — | — | 2 | 2 | 2 | 1 | — | — | — | — | — | 1 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 8 | 38 | 0 | 0 | 0 | 38 | 51 | 51 | 51 | 51 | 51 | 51 | 51 | 61 | 64 | 64 | 64 | 61 | 61 | 61 | 16 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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