Surf Forecasts:
How big are the waves at Rock Island today (23 Oct):
- Afternoon surf: Afternoon surf (23 Oct, local time) - 3ft (0.9m), 13s period with S swell.
- Evening surf: Evening surf (23 Oct, local time) - 3ft (0.9m), 14s period with SSW swell.
The current surf forecast for Rock Island at 9PM is: 0.9m 14s primary swell from a South-southwest direction and 0.6m 8s secondary swell from a Southeast direction, 1.1m 8s secondary swell from a Southeast direction (forecast issued at 02:00pm October 23). The wind direction is predicted to be cross-shore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (23 Oct) | - | - |
| Afternoon (23 Oct) | 3ft (0.9m) | 13s |
| Evening (23 Oct) | 3ft (0.9m) | 14s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 20mm), heaviest during Sat afternoon. Warm (max 23°C on Sun morning, min 16°C on Sat afternoon). Mainly fresh winds. | ||||||||||||||||||||
Fri 23 | Saturday 24 | Sunday 25 | ||||||||||||||||||
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) | S 13 | S 13 | SSW 13 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SW 14 | SSW 13 | SSW 14 | SSW 14 | SW 14 | SSW 14 | SW 16 | SSW 13 | SW 14 | SSW 5 | SSW 6 | SSW 7 | S 7 |
Wave Graph  | ||||||||||||||||||||
 kJ | 321 | 252 | 212 | 351 | 249 | 246 | 192 | 91 | 125 | 178 | 178 | 189 | 161 | 183 | 118 | 56 | 98 | 167 | 222 | 94 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross | cross | cross | glassy | glassy | off | off | off | cross-off | off | off | glassy | on | on | cross-on | on | cross-on | off | off |
High Tide | 3:17PM1.40m | 3:38AM1.40m | 3:43PM1.43m | 4:29AM1.47m | 4:08PM1.47m | |||||||||||||||
Low Tide | 9:28PM0.60m | 9:41AM0.62m | 10:04PM0.44m | 10:20AM0.68m | ||||||||||||||||
 |  |  | | | | | |  |  |  | | | | | | | | | | |
 | — | — | — | — | — | 5:54 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — |
 | — | 4:58 | — | — | — | — | — | — | — | 4:55 | — | — | — | — | — | — | — | 4:54 | — | — |
mm | — | — | — | — | — | — | — | — | 2 | 15 | 3 | — | — | — | — | — | — | — | — | — |
Temp °C | 18 | 19 | 19 | 19 | 20 | 20 | 19 | 20 | 19 | 16 | 17 | 18 | 18 | 19 | 21 | 22 | 23 | 23 | 21 | 21 |
Feels °C | 16 | 18 | 18 | 18 | 21 | 21 | 19 | 20 | 19 | 12 | 14 | 17 | 19 | 19 | 20 | 23 | 22 | 22 | 20 | 21 |
Swell 1 Height (m) Direction Period (s) | S 13 | S 13 | SSW 13 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 13 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSW 12 | SW 15 | SW 12 | SSW 7 | S 7 |
| kJ | 321 | 252 | 212 | 351 | 249 | 246 | 192 | 79 | 125 | 86 | 75 | 72 | 53 | 41 | 41 | 56 | 34 | 35 | 131 | 94 |
Swell 2 Height (m) Direction Period (s) | SSW 16 | SSW 15 | SSW 15 | SE 8 | SE 8 | SSE 8 | SSE 8 | SW 14 | SW 15 | SSW 14 | SSW 14 | SW 14 | SSW 14 | SW 13 | SSW 13 | SW 14 | — | SW 14 | SW 12 | SW 12 |
| kJ | 98 | 131 | 125 | 41 | 54 | 46 | 46 | 91 | 57 | 178 | 178 | 189 | 161 | 183 | 118 | 52 | — | 31 | 37 | 21 |
Swell 3 Height (m) Direction Period (s) | SSW 16 | — | SE 8 | — | — | — | — | — | — | SE 8 | SW 20 | SW 18 | SW 18 | SW 16 | — | — | — | — | SE 10 | SW 13 |
| kJ | 175 | — | 32 | — | — | — | — | — | — | 74 | 15 | 117 | 13 | 167 | — | — | — | — | 26 | 7 |
Wind waves Height (m) Direction Period (s) | — | ESE 6 | SE 8 | SE 8 | SE 8 | — | SE 8 | SE 8 | SE 7 | SE 7 | NNE 3 | N 3 | — | — | — | SSE 7 | SSW 5 | SSW 6 | SSW 7 | — |
| kJ | — | 32 | 151 | 171 | 149 | — | 169 | 69 | 73 | 178 | 2 | 1 | — | — | — | 45 | 98 | 167 | 222 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 12 | 27 | 17 | 0 | 0 | 0 | 0 | 0 | 27 | 0 | 0 | 0 | 14 | 27 | 12 | 92 | 10 | 0 | 0 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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