Surf Forecasts:
How big are the waves at Rock Island today (20 Jun):
- Morning surf: Morning surf (20 Jun, local time) - 0.5ft (0.2m), 10s period with SSE swell.
- Afternoon surf: Afternoon surf (20 Jun, local time) - 0.5ft (0.2m), 10s period with SSE swell.
- Evening surf: Evening surf (20 Jun, local time) - 0.5ft (0.2m), 10s period with SSE swell.
The current surf forecast for Rock Island at 2AM is: 0.2m 10s primary swell from a South-southeast direction and 0.3m 5s secondary swell from a South direction (forecast issued at 08:00pm June 19). The wind direction is predicted to be cross-shore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Jun) | 0.5ft (0.2m) | 10s |
| Afternoon (20 Jun) | 0.5ft (0.2m) | 10s |
| Evening (20 Jun) | 0.5ft (0.2m) | 10s |
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 37mm), heaviest during Sat night. Warm (max 25°C on Sun afternoon, min 20°C on Sat afternoon). Winds increasing (calm on Sat morning, strong winds from the SSE by Sat night). | ||||||||||||||||||||||||
Fri 19 | Saturday 20 | Sunday 21 | Monday 22 | |||||||||||||||||||||
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 | 12 PM | 3 PM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | S 6 | S 6 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 4 | SSE 5 | S 6 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 8 | SSW 8 | SSW 8 | SSW 8 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 11 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 16 | 94 | 164 | 328 | 268 | 169 | 272 | 86 | 74 | 57 | 63 | 75 | 58 | 51 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross | cross-off | off | glassy | cross-on | on | cross-on | cross-on | cross-on | on | cross-off | cross-off | glassy | cross | glassy | off | cross-off | off | glassy | on | cross-on |
High Tide | 8:53PM1.37m | 7:09AM1.36m | 9:28PM1.35m | 8:05AM1.28m | 10:04PM1.33m | 9:12AM1.19m | ||||||||||||||||||
Low Tide | 2:01AM0.93m | 2:19PM0.17m | 2:54AM0.87m | 3:02PM0.31m | 3:53AM0.80m | |||||||||||||||||||
 |  | |  |  |  | | | | |  | | | |  | | | | | | | | | | |
 | — | — | — | 4:26 | — | — | — | — | — | — | — | 4:26 | — | — | — | — | — | — | — | 4:26 | — | — | — | — |
 | 6:59 | — | — | — | — | — | — | — | 6:59 | — | — | — | — | — | — | — | 6:59 | — | — | — | — | — | — | 6:59 |
mm | — | — | — | 1 | — | 1 | 3 | 3 | 4 | 5 | 6 | 8 | 5 | 1 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 23 | 23 | 23 | 22 | 22 | 22 | 21 | 20 | 20 | 21 | 21 | 23 | 22 | 23 | 24 | 25 | 24 | 23 | 22 | 22 | 23 | 23 | 24 |
Feels °C | 26 | 25 | 25 | 26 | 23 | 24 | 25 | 23 | 21 | 20 | 20 | 17 | 22 | 24 | 25 | 27 | 28 | 27 | 22 | 21 | 23 | 25 | 23 | 25 |
Swell 1 Height (m) Direction Period (s) | S 6 | S 6 | S 6 | S 5 | S 5 | SSW 7 | SSE 10 | SSE 10 | SSE 10 | SSW 7 | SSW 7 | E 18 | SE 12 | S 6 | S 6 | S 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 8 | SSW 8 | SSW 8 | SSW 8 |
| kJ | 11 | 10 | 5 | 5 | 2 | 5 | 9 | 9 | 9 | 5 | 4 | 6 | 5 | 141 | 101 | 74 | 86 | 86 | 74 | 57 | 63 | 75 | 58 | 51 |
Swell 2 Height (m) Direction Period (s) | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SE 5 | SE 12 | SE 12 | SSE 10 | SE 12 | — | S 9 | SE 11 | SE 11 | SE 11 | SE 9 | SSE 9 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 |
| kJ | 10 | 10 | 10 | 9 | 9 | 9 | 1 | 6 | 6 | 9 | 6 | — | 2 | 5 | 5 | 5 | 3 | 9 | 10 | 10 | 10 | 10 | 10 | 10 |
Swell 3 Height (m) Direction Period (s) | SE 14 | SW 7 | SSW 7 | SSW 7 | SW 7 | SE 5 | SE 12 | — | SE 4 | SE 12 | E 9 | — | E 10 | SE 11 | S 9 | SE 9 | SE 11 | SE 11 | ESE 6 | ESE 6 | E 6 | E 8 | E 8 | E 8 |
| kJ | 7 | 2 | 5 | 4 | 2 | 1 | 6 | — | 4 | 6 | 7 | — | 2 | 20 | 2 | 3 | 5 | 5 | 4 | 4 | 1 | 1 | 1 | 5 |
Wind waves Height (m) Direction Period (s) | S 3 | — | — | — | — | — | SSW 6 | SSW 6 | S 6 | SSE 4 | SSE 4 | SSE 5 | S 6 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | — | — | — | — | — | — | — |
| kJ | 2 | — | — | — | — | — | 4 | 8 | 6 | 3 | 16 | 94 | 164 | 328 | 268 | 169 | 272 | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 77 | 55 | 55 | 54 | 145 | 77 | 54 | 54 | 54 | 76 | 491 | 136 | 14 | 0 | 0 | 0 | 38 | 0 | 0 | 2 | 0 | 0 | 18 | 77 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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