Surf Forecasts:
How big are the waves at Rock Island today (17 Jun):
- Afternoon surf: Afternoon surf (17 Jun, local time) - 0.5ft (0.1m), 18s period with S swell.
- Evening surf: Evening surf (17 Jun, local time) - 0.5ft (0.1m), 17s period with S swell.
The current surf forecast for Rock Island at 8PM is: 0.1m 17s primary swell from a South direction and 0.1m 10s secondary swell from a Southeast direction, 0.1m 7s secondary swell from a Southwest direction, 0.4m 4s secondary swell from a South-southeast direction (forecast issued at 02:00pm June 17). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Jun) | - | - |
| Afternoon (17 Jun) | 0.5ft (0.1m) | 18s |
| Evening (17 Jun) | 0.5ft (0.1m) | 17s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 17mm), heaviest on Wed night. Warm (max 26°C on Thu afternoon, min 20°C on Wed night). Wind will be generally light. | ||||||||||||||||||||||||
Wed 17 | Thursday 18 | Friday 19 | Sat 20 | |||||||||||||||||||||
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) | S 7 | S 18 | S 3 | S 17 | SSE 5 | S 5 | S 7 | S 7 | S 6 | SSE 6 | SSE 6 | SSE 6 | S 7 | S 6 | SW 8 | S 6 | S 6 | S 6 | SW 9 | SW 8 | SSW 4 | S 9 | SSW 8 | S 7 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 8 | 6 | 6 | 6 | 17 | 13 | 52 | 54 | 21 | 21 | 22 | 22 | 42 | 31 | 20 | 19 | 17 | 19 | 20 | 16 | 6 | 41 | 35 | 27 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | on | glassy | off | off | off | off | glassy | on | on | glassy | glassy | cross-off | cross-off | on | on | on | cross-on | cross-off | cross-off | cross-off | off |
High Tide | 7:39PM1.41m | 5:34AM1.46m | 8:16PM1.39m | 6:20AM1.42m | 8:53PM1.37m | 7:09AM1.36m | ||||||||||||||||||
Low Tide | 12:17PM-0.07m | 00:30AM1.01m | 12:57PM-0.03m | 1:14AM0.98m | 1:38PM0.05m | 2:01AM0.93m | ||||||||||||||||||
 | |  |  |  |  |  |  | | | |  | |  | | | | | | | | | | | |
 | — | — | — | — | — | 4:26 | — | — | — | — | — | — | — | 4:26 | — | — | — | — | — | — | — | 4:26 | — | — |
 | — | — | 6:58 | — | — | — | — | — | — | — | 6:58 | — | — | — | — | — | — | — | 6:59 | — | — | — | — | 6:59 |
mm | — | — | — | — | 4 | 9 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 23 | 22 | 21 | 21 | 20 | 20 | 20 | 21 | 23 | 26 | 24 | 23 | 23 | 22 | 22 | 23 | 24 | 24 | 24 | 24 | 23 | 22 | 22 | 22 |
Feels °C | 22 | 20 | 20 | 21 | 23 | 20 | 19 | 20 | 21 | 28 | 25 | 24 | 26 | 25 | 24 | 25 | 26 | 25 | 26 | 26 | 26 | 24 | 23 | 22 |
Swell 1 Height (m) Direction Period (s) | S 11 | S 11 | SW 7 | SE 10 | SSE 4 | S 5 | S 7 | S 7 | S 6 | SSE 6 | SSE 6 | SSE 6 | S 7 | S 6 | S 6 | S 6 | SSW 7 | SSE 10 | SW 9 | SW 8 | SSW 4 | S 9 | SSW 8 | S 7 |
| kJ | 2 | 2 | 2 | 4 | 6 | 13 | 52 | 54 | 19 | 21 | 22 | 22 | 42 | 31 | 20 | 19 | 5 | 10 | 20 | 16 | 5 | 41 | 35 | 27 |
Swell 2 Height (m) Direction Period (s) | E 9 | E 9 | S 11 | SW 7 | SW 8 | SSW 8 | SE 10 | SE 10 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSE 9 | SW 8 | SW 8 | SSW 7 | SSE 10 | SW 10 | SSE 10 | SSE 6 | SSW 8 | SSE 10 | SSE 10 | SSE 10 |
| kJ | 2 | 2 | 2 | 2 | 3 | 6 | 4 | 4 | 21 | 18 | 15 | 15 | 8 | 17 | 16 | 10 | 10 | 4 | 10 | 3 | 6 | 9 | 9 | 9 |
Swell 3 Height (m) Direction Period (s) | S 18 | S 18 | SE 10 | S 17 | SE 10 | SE 10 | S 16 | S 16 | SE 10 | SE 10 | SE 9 | SSE 8 | SW 10 | SE 11 | SSE 10 | SSE 10 | S 7 | SE 14 | SE 14 | SSE 10 | SSE 6 | SE 13 | SE 13 | SE 13 |
| kJ | 6 | 6 | 4 | 6 | 4 | 4 | 5 | 5 | 4 | 4 | 3 | 7 | 4 | 5 | 11 | 10 | 1 | 7 | 7 | 10 | 3 | 7 | 7 | 7 |
Wind waves Height (m) Direction Period (s) | S 7 | S 3 | S 3 | SSE 4 | SSE 5 | — | — | N 2 | NNE 3 | NNE 3 | — | — | — | — | — | — | S 6 | S 6 | S 6 | S 4 | — | — | — | — |
| kJ | 8 | 4 | 6 | 4 | 17 | — | — | 1 | 2 | 1 | — | — | — | — | — | — | 17 | 19 | 16 | 7 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 77 | 77 | 77 | 76 | 38 | 38 | 0 | 0 | 55 | 38 | 16 | 18 | 0 | 0 | 38 | 16 | 18 | 18 | 18 | 54 | 51 | 0 | 38 | 38 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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