Surf Forecasts:
How big are the waves at Rock Island today (30 Oct):
- Morning surf: Morning surf (30 Oct, local time) - 3ft (0.9m), 8s period with SSE swell.
- Afternoon surf: Afternoon surf (30 Oct, local time) - 4ft (1.2m), 8s period with SSE swell.
- Evening surf: Evening surf (30 Oct, local time) - 3.5ft (1.1m), 8s period with SSE swell.
The current surf forecast for Rock Island at 8AM is: 0.9m 8s primary swell from a Southeast direction and 0.3m 12s secondary swell from a Southeast direction (forecast issued at 02:00am October 30). The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 Oct) | 3ft (0.9m) | 8s |
| Afternoon (30 Oct) | 4ft (1.2m) | 8s |
| Evening (30 Oct) | 3.5ft (1.1m) | 8s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 23°C on Fri afternoon, min 16°C on Sat night). Winds decreasing (fresh winds from the NNE on Sat night, light winds from the S by Sun afternoon). | ||||||||||||||||||||||||
Friday 30 | Saturday 31 | Sunday 1 | ||||||||||||||||||||||
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 | 6 PM | 9 PM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | SE 13 | SE 8 | SE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | S 8 | SE 14 | SE 14 | SE 20 | SSE 19 | SE 18 | SE 17 | SSE 19 | SE 17 | SSE 18 | SSE 16 | SE 16 | SE 14 | SSE 15 | SSE 14 | SSE 14 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 26 | 48 | 78 | 120 | 150 | 190 | 207 | 171 | 131 | 62 | 68 | 186 | 742 | 528 | 405 | 332 | 549 | 459 | 886 | 565 | 492 | 941 | 494 | 845 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-off | off | cross-off | on | cross-on | off | off | off | off | cross-off | cross-off | cross-on | on | cross-on |
High Tide | 8:21AM1.43m | 6:25PM1.51m | 9:16AM1.37m | 6:59PM1.46m | 10:19AM1.33m | 7:42PM1.38m | ||||||||||||||||||
Low Tide | 1:08AM0.09m | 1:11PM1.05m | 1:51AM0.14m | 1:52PM1.10m | 2:38AM0.21m | 2:47PM1.13m | ||||||||||||||||||
 |  | |  | |  | | | |  | |  | | | | | | | | | | | | | |
 | — | — | 6:00 | — | — | — | — | — | — | — | 6:01 | — | — | — | — | — | — | — | 6:01 | — | — | — | — | — |
 | — | — | — | — | — | 4:50 | — | — | — | — | — | — | — | 4:49 | — | — | — | — | — | — | — | 4:47 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 18 | 18 | 18 | 22 | 23 | 21 | 20 | 19 | 19 | 18 | 19 | 21 | 21 | 21 | 21 | 18 | 16 | 16 | 16 | 17 | 17 | 18 | 19 |
Feels °C | 14 | 16 | 16 | 15 | 18 | 19 | 16 | 17 | 16 | 17 | 17 | 15 | 18 | 19 | 19 | 19 | 11 | 10 | 12 | 12 | 15 | 16 | 18 | 18 |
Swell 1 Height (m) Direction Period (s) | SE 7 | SE 8 | SE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | SSE 8 | S 8 | SE 8 | SSW 5 | S 7 | SSE 19 | SE 18 | SE 17 | SE 16 | SE 17 | SE 15 | SSE 16 | SE 16 | SE 14 | SSE 15 | SSE 14 | SSE 14 |
| kJ | 26 | 48 | 78 | 120 | 150 | 190 | 207 | 171 | 131 | 62 | 29 | 68 | 742 | 528 | 405 | 299 | 549 | 360 | 886 | 565 | 476 | 941 | 494 | 845 |
Swell 2 Height (m) Direction Period (s) | SE 13 | SE 13 | SE 13 | ESE 12 | ESE 12 | SE 12 | SE 12 | ESE 12 | SE 13 | SSW 5 | SSE 8 | SE 13 | SE 19 | SSW 7 | SSE 20 | SSE 19 | SSE 20 | SSE 18 | SW 7 | SSE 18 | SSE 17 | ESE 6 | SSE 16 | ESE 9 |
| kJ | 26 | 25 | 25 | 15 | 15 | 24 | 6 | 15 | 27 | 21 | 39 | 82 | 577 | 15 | 158 | 332 | 216 | 459 | 25 | 356 | 492 | 14 | 273 | 17 |
Swell 3 Height (m) Direction Period (s) | — | — | SE 18 | SE 16 | SE 16 | SE 15 | SE 15 | SE 15 | SE 20 | SE 14 | SE 14 | SE 20 | SW 7 | — | SSW 8 | SW 8 | SW 8 | SW 8 | — | SW 7 | — | — | — | — |
| kJ | — | — | 12 | 10 | 10 | 8 | 9 | 9 | 16 | 48 | 68 | 186 | 35 | — | 6 | 10 | 10 | 20 | — | 12 | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | W 3 | WSW 4 | WSW 4 | SW 4 | SW 5 | WSW 5 | — | — | — | — | — | — | NNE 4 | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 2 | 16 | 13 | 32 | 56 | 25 | — | — | — | — | — | — | 12 | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 16 | 12 | 10 | 2 | 14 | 12 | 14 | 14 | 14 | 10 | 0 | 0 | 0 | 14 | 27 | 0 | 27 | 0 | 0 | 0 | 0 | 38 | 14 | 10 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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