Surf Forecasts:
How big are the waves at Rock Island today (15 Jun):
- Afternoon surf: Afternoon surf (15 Jun, local time) - 1.5ft (0.4m), 7s period with SE swell.
- Evening surf: Evening surf (15 Jun, local time) - 1.5ft (0.5m), 9s period with SE swell.
The current surf forecast for Rock Island at 8PM is: 0.5m 9s primary swell from a Southeast direction and 0.3m 8s secondary swell from a South-southeast direction (forecast issued at 02:00pm June 15). An open ocean swell of 0.5m 3s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Jun) | - | - |
| Afternoon (15 Jun) | 1.5ft (0.4m) | 7s |
| Evening (15 Jun) | 1.5ft (0.5m) | 9s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 23mm), heaviest during Wed night. Warm (max 22°C on Wed morning, min 17°C on Mon night). Winds increasing (calm on Mon night, fresh winds from the N by Thu morning). | ||||||||||||||||||||||||
Mon 15 | Tuesday 16 | Wednesday 17 | Thu 18 | |||||||||||||||||||||
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) | SSE 6 | SE 7 | SE 8 | SE 9 | SE 9 | SSE 8 | SSE 8 | SE 8 | SE 8 | SE 8 | SE 7 | SE 7 | SSE 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | S 3 | S 18 | S 17 | SE 16 | S 4 | S 5 | S 7 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 10 | 12 | 35 | 39 | 40 | 61 | 44 | 31 | 15 | 10 | 10 | 8 | 5 | 5 | 5 | 5 | 9 | 2 | 6 | 6 | 10 | 13 | 7 | 26 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | glassy | cross-on | cross-on | on | on | on | on | on | on | on | on | on | on | on | cross-on | off | off | cross-off |
High Tide | 6:19PM1.39m | 4:10AM1.47m | 7:00PM1.41m | 4:52AM1.47m | 7:39PM1.41m | 5:34AM1.46m | ||||||||||||||||||
Low Tide | 10:57AM-0.05m | 11:06PM1.02m | 11:37AM-0.08m | 11:48PM1.02m | 12:17PM-0.07m | 00:30AM1.01m | ||||||||||||||||||
 |  |  |  | | | | | |  | |  | | | | | | | | |  |  |  | | |
 | — | — | — | — | — | 4:26 | — | — | — | — | — | — | — | 4:26 | — | — | — | — | — | — | — | 4:26 | — | — |
 | — | — | 6:57 | — | — | — | — | — | — | — | 6:58 | — | — | — | — | — | — | — | 6:58 | — | — | — | — | 6:58 |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 8 | 12 | 1 |
Temp °C | 18 | 18 | 19 | 18 | 18 | 18 | 17 | 19 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 21 | 21 | 20 | 20 | 20 | 21 | 21 |
Feels °C | 13 | 13 | 15 | 15 | 16 | 17 | 18 | 19 | 19 | 19 | 18 | 20 | 20 | 20 | 21 | 22 | 20 | 18 | 18 | 19 | 22 | 21 | 21 | 18 |
Swell 1 Height (m) Direction Period (s) | SSE 6 | SE 7 | SE 8 | SE 9 | SE 9 | SE 8 | SSE 8 | SE 8 | SE 8 | SSW 7 | SE 7 | SE 7 | SSE 7 | SSW 7 | SSW 7 | SSW 7 | SE 6 | SW 7 | S 11 | SW 7 | SE 10 | S 4 | S 5 | S 7 |
| kJ | 10 | 12 | 35 | 39 | 40 | 57 | 44 | 31 | 15 | 10 | 7 | 8 | 4 | 5 | 5 | 5 | 1 | 2 | 2 | 2 | 4 | 3 | 7 | 26 |
Swell 2 Height (m) Direction Period (s) | SE 9 | SSE 6 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | — | SSW 8 | SSW 7 | SE 8 | SSW 7 | SSW 7 | SSW 7 | SE 6 | SSE 6 | SE 6 | S 11 | SE 6 | SE 10 | SE 10 | S 6 | SE 10 | SE 10 | SE 10 |
| kJ | 3 | 8 | 22 | 13 | 21 | 61 | — | 11 | 11 | 9 | 10 | 5 | 5 | 2 | 4 | 1 | 2 | 1 | 4 | 4 | 1 | 4 | 4 | 4 |
Swell 3 Height (m) Direction Period (s) | E 8 | E 14 | E 14 | — | S 22 | S 22 | SSE 8 | E 13 | — | SSE 7 | S 20 | E 11 | S 6 | E 11 | — | E 9 | S 18 | S 11 | S 18 | S 17 | SE 16 | SW 8 | S 16 | S 16 |
| kJ | 6 | 4 | 4 | — | 9 | 9 | 7 | 3 | — | 5 | 8 | 2 | 1 | 2 | — | 2 | 6 | 2 | 6 | 6 | 10 | 3 | 5 | 5 |
Wind waves Height (m) Direction Period (s) | NNE 3 | NNE 3 | N 3 | NNE 3 | NNE 3 | NNE 3 | NNE 3 | — | — | — | S 3 | S 3 | — | — | — | — | SSW 7 | S 3 | S 3 | S 3 | S 3 | S 4 | NNE 2 | NNE 3 |
| kJ | 6 | 8 | 5 | 3 | 2 | 1 | 1 | — | — | — | 1 | 1 | — | — | — | — | 9 | 2 | 4 | 3 | 2 | 13 | 1 | 9 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 228 | 145 | 8 | 0 | 0 | 0 | 0 | 16 | 18 | 64 | 76 | 76 | 76 | 76 | 76 | 76 | 77 | 77 | 77 | 77 | 92 | 16 | 38 | 54 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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