Surf Forecasts:
How big are the waves at Rock Island today (22 Oct):
- Morning surf: Morning surf (22 Oct, local time) - 3.5ft (1.0m), 13s period with SSE swell.
- Afternoon surf: Afternoon surf (22 Oct, local time) - 3.5ft (1.1m), 14s period with S swell.
- Evening surf: Evening surf (22 Oct, local time) - 3ft (0.9m), 13s period with S swell.
The current surf forecast for Rock Island at 3AM is: 1.0m 14s primary swell from a South direction and 1.3m 7s secondary swell from a South-southwest direction, 1.7m 7s secondary swell from a Southwest direction (forecast issued at 08:00pm October 21). The wind direction is predicted to be cross-offshore and the swell rating is 4.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 Oct) | 3.5ft (1.0m) | 13s |
| Afternoon (22 Oct) | 3.5ft (1.1m) | 14s |
| Evening (22 Oct) | 3ft (0.9m) | 13s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 30mm), heaviest during Sat afternoon. Warm (max 25°C on Wed night, min 15°C on Sat afternoon). Winds decreasing (strong winds from the SW on Wed night, calm by Fri night). | ||||||||||||||||||
Wed 21 | Thursday 22 | Friday 23 | ||||||||||||||||
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) | SSW 7 | S 14 | SSW 7 | S 14 | S 16 | SSE 13 | S 14 | S 14 | S 13 | S 13 | S 14 | S 13 | S 13 | S 13 | S 13 | S 13 | S 12 | SSW 14 |
Wave Graph  | ||||||||||||||||||
 kJ | 317 | 416 | 349 | 394 | 701 | 356 | 687 | 432 | 503 | 264 | 496 | 264 | 417 | 350 | 263 | 252 | 248 | 336 |
Wind (km/h) | ||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-off |
High Tide | 1:20AM1.24m | 2:50PM1.37m | 2:38AM1.31m | 3:17PM1.40m | ||||||||||||||
Low Tide | 8:07PM0.93m | 8:02AM0.54m | 8:51PM0.77m | 8:56AM0.57m | ||||||||||||||
 | | | |  | |  |  |  | | | | | | | |  | | |
 | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:54 | — | — | — | — | — | — |
 | — | — | — | — | — | — | — | 4:59 | — | — | — | — | — | — | — | 4:58 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 25 | 23 | 22 | 21 | 19 | 19 | 18 | 17 | 17 | 16 | 16 | 16 | 17 | 19 | 19 | 19 |
Feels °C | 22 | 20 | 22 | 22 | 18 | 16 | 14 | 15 | 14 | 13 | 13 | 11 | 12 | 12 | 14 | 17 | 17 | 18 |
Swell 1 Height (m) Direction Period (s) | S 14 | S 14 | S 14 | SSW 7 | S 16 | SSE 13 | S 14 | S 14 | S 13 | S 13 | S 14 | S 13 | S 13 | S 13 | S 13 | S 13 | S 12 | SSW 14 |
| kJ | 297 | 416 | 253 | 167 | 701 | 356 | 687 | 432 | 503 | 264 | 496 | 264 | 417 | 350 | 263 | 252 | 248 | 336 |
Swell 2 Height (m) Direction Period (s) | S 18 | S 18 | S 17 | S 14 | SSW 7 | S 15 | SSW 7 | S 16 | SE 9 | SSW 15 | SE 10 | SSW 15 | SE 9 | ESE 9 | SSW 16 | SSW 15 | SSW 15 | SE 8 |
| kJ | 169 | 238 | 297 | 394 | 77 | 283 | 19 | 139 | 13 | 184 | 15 | 176 | 64 | 7 | 98 | 131 | 146 | 11 |
Swell 3 Height (m) Direction Period (s) | — | SE 10 | SSE 10 | S 17 | SE 9 | SSW 7 | SE 10 | SE 10 | SE 10 | SE 10 | SE 4 | SE 10 | ESE 9 | SE 9 | ESE 8 | — | — | — |
| kJ | — | 47 | 35 | 270 | 29 | 35 | 33 | 45 | 45 | 45 | 1 | 14 | 62 | 39 | 14 | — | — | — |
Wind waves Height (m) Direction Period (s) | SSW 7 | SSW 7 | SSW 7 | SW 7 | — | — | ENE 3 | NE 3 | ENE 3 | ENE 3 | NE 3 | ENE 3 | NE 4 | NE 3 | NE 3 | — | — | — |
| kJ | 317 | 392 | 349 | 276 | — | — | 7 | 5 | 4 | 4 | 3 | 4 | 10 | 2 | 4 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||
Distance (km) | 487 | 488 | 488 | 0 | 0 | 38 | 92 | 136 | 552 | 552 | 488 | 12 | 12 | 6 | 0 | 6 | 8 | 0 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||
Header Global | ||||||||||||||||||
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