Surf Forecasts:
How big are the waves at Rock Island today (13 Jun):
- Morning surf: Morning surf (13 Jun, local time) - 1.5ft (0.4m), 6s period with SSE swell.
- Afternoon surf: Afternoon surf (13 Jun, local time) - 2ft (0.6m), 7s period with S swell.
- Evening surf: Evening surf (13 Jun, local time) - 2ft (0.6m), 4s period with SSW swell.
The current surf forecast for Rock Island at 11AM is: 0.4m 7s primary swell from a South-southeast direction and 0.3m 8s secondary swell from a South-southwest direction (forecast issued at 08:00am June 13). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Jun) | 1.5ft (0.4m) | 6s |
| Afternoon (13 Jun) | 2ft (0.6m) | 7s |
| Evening (13 Jun) | 2ft (0.6m) | 4s |
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 25mm), heaviest during Mon morning. Warm (max 23°C on Sat afternoon, min 17°C on Mon morning). Winds increasing (calm on Sat night, fresh winds from the NNE by Mon afternoon). | ||||||||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tue 16 | |||||||||||||||||||||
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 | 12 AM | 3 AM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | SSW 9 | SSE 6 | SSW 8 | S 7 | S 4 | SSW 4 | SSW 4 | SSW 5 | S 5 | S 6 | S 6 | S 3 | S 4 | S 4 | SSE 4 | S 4 | SE 5 | SSE 5 | SSE 6 | SE 8 | S 9 | SSE 9 | SSE 9 | SSE 8 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 15 | 14 | 13 | 33 | 9 | 12 | 15 | 24 | 7 | 12 | 19 | 7 | 9 | 4 | 4 | 9 | 26 | 17 | 12 | 37 | 81 | 169 | 116 | 84 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | glassy | on | on | on | on | cross-on | glassy | glassy | cross-on | on | on | on | cross-on | cross-on | cross-on | cross-off | cross-off | off | off | off | off | off | off |
High Tide | 4:47PM1.30m | 2:52AM1.41m | 5:35PM1.36m | 3:31AM1.44m | 6:19PM1.39m | |||||||||||||||||||
Low Tide | 9:33AM0.13m | 9:36PM0.96m | 10:15AM0.03m | 10:23PM1.00m | 10:57AM-0.05m | 11:06PM1.02m | ||||||||||||||||||
 | | |  | |  | | | | | |  | |  | |  |  |  | | | | |  | | |
 | 4:26 | — | — | — | — | — | — | 4:26 | — | — | — | — | — | — | — | 4:26 | — | — | — | — | — | — | — | 4:26 |
 | — | — | — | — | 6:57 | — | — | — | — | — | — | — | 6:57 | — | — | — | — | — | — | — | 6:57 | — | — | 6:58 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 5 | 8 | 6 | 2 | — | — | — | — |
Temp °C | 20 | 21 | 21 | 23 | 23 | 22 | 22 | 21 | 21 | 22 | 22 | 22 | 22 | 21 | 21 | 19 | 18 | 17 | 17 | 18 | 18 | 18 | 18 | 18 |
Feels °C | 20 | 23 | 21 | 21 | 21 | 20 | 22 | 23 | 23 | 23 | 22 | 21 | 21 | 20 | 21 | 18 | 18 | 14 | 13 | 13 | 13 | 13 | 14 | 15 |
Swell 1 Height (m) Direction Period (s) | SSE 6 | SSE 6 | SSE 7 | SSW 8 | SSW 8 | SSE 7 | SSE 7 | S 5 | S 5 | S 6 | SE 10 | SE 10 | SE 10 | S 6 | SW 7 | S 4 | SSE 4 | SSE 5 | SSE 6 | SE 8 | S 9 | SSE 9 | SSE 9 | SSE 8 |
| kJ | 7 | 13 | 10 | 6 | 6 | 4 | 5 | 11 | 7 | 12 | 4 | 4 | 4 | 3 | 2 | 7 | 5 | 17 | 12 | 37 | 81 | 151 | 116 | 76 |
Swell 2 Height (m) Direction Period (s) | SSW 9 | SSW 8 | SSW 8 | E 8 | SE 8 | SSW 8 | SW 8 | SSE 7 | SSE 6 | SW 7 | — | SE 9 | S 8 | SE 10 | SE 9 | S 6 | S 6 | SE 9 | SE 7 | S 10 | ESE 8 | ESE 9 | E 9 | ESE 9 |
| kJ | 15 | 14 | 13 | 1 | 2 | 6 | 2 | 9 | 4 | 2 | — | 3 | 1 | 4 | 3 | 1 | 1 | 3 | 7 | 8 | 47 | 169 | 79 | 84 |
Swell 3 Height (m) Direction Period (s) | S 7 | SE 9 | SE 8 | — | — | E 7 | E 8 | SW 8 | S 7 | SE 10 | SE 10 | E 15 | SSW 6 | SSW 6 | SW 7 | S 6 | SE 9 | E 8 | — | — | — | — | E 13 | SSW 9 |
| kJ | 1 | 3 | 2 | — | — | 1 | 1 | 3 | 1 | 4 | 4 | 4 | 4 | 3 | 2 | 1 | 3 | 6 | — | — | — | — | 4 | 9 |
Wind waves Height (m) Direction Period (s) | — | — | — | S 7 | S 4 | SSW 4 | SSW 4 | SSW 5 | SW 5 | — | S 6 | S 3 | S 4 | S 4 | SSE 4 | SSE 4 | SE 5 | — | NE 3 | NE 3 | NNE 4 | NNE 4 | N 4 | N 3 |
| kJ | — | — | — | 33 | 9 | 12 | 15 | 24 | 6 | — | 19 | 7 | 9 | 4 | 4 | 9 | 26 | — | 4 | 12 | 10 | 14 | 13 | 4 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 16 | 16 | 16 | 16 | 18 | 92 | 92 | 92 | 76 | 76 | 76 | 76 | 77 | 77 | 77 | 76 | 77 | 64 | 552 | 488 | 509 | 487 | 136 | 136 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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