Surf Forecasts:
How big are the waves at Rock Island today (12 Oct):
- Morning surf: Morning surf (12 Oct, local time) - 2.5ft (0.8m), 16s period with SE swell.
- Afternoon surf: Afternoon surf (12 Oct, local time) - 3.5ft (1.1m), 15s period with SE swell.
- Evening surf: Evening surf (12 Oct, local time) - 3ft (0.9m), 14s period with SE swell.
The current surf forecast for Rock Island at 8AM is: 0.8m 17s primary swell from a Southeast direction and 0.8m 15s secondary swell from a Southeast direction, 0.2m 9s secondary swell from a East-southeast direction (forecast issued at 02:00am October 12). An open ocean swell of 0.5m 3s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (12 Oct) | 2.5ft (0.8m) | 16s |
| Afternoon (12 Oct) | 3.5ft (1.1m) | 15s |
| Evening (12 Oct) | 3ft (0.9m) | 14s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 25°C on Wed morning, min 19°C on Mon night). Winds increasing (calm on Tue afternoon, strong winds from the NNE by Wed night). | ||||||||||||||||||||||||
Monday 12 | Tuesday 13 | Wednesday 14 | ||||||||||||||||||||||
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 16 | SE 15 | SE 17 | SE 16 | SE 15 | SE 15 | SE 15 | SE 14 | SE 14 | SE 14 | SE 13 | SE 13 | SE 12 | SE 12 | SE 12 | SE 11 | SE 11 | SE 10 | SE 10 | SE 10 | SW 5 | SSW 5 | SSW 6 | SSW 6 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 306 | 233 | 346 | 352 | 456 | 492 | 472 | 346 | 322 | 322 | 299 | 242 | 217 | 175 | 112 | 75 | 55 | 25 | 24 | 15 | 65 | 106 | 77 | 34 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | cross-off | cross-off | off | off | off | off | off | off | glassy | on | on | on | cross-on | on | on | on | on | on | off |
High Tide | 5:38AM1.56m | 5:11PM1.51m | 6:22AM1.55m | 5:35PM1.53m | 7:07AM1.52m | 6:00PM1.54m | ||||||||||||||||||
Low Tide | 11:09PM0.34m | 11:29AM0.68m | 11:43PM0.24m | 12:00PM0.77m | 00:19AM0.18m | 12:31PM0.87m | ||||||||||||||||||
 | |  |  | | | | | | | | | | | | | | | | | | | | | |
 | — | 5:43 | — | — | — | — | — | — | — | 5:45 | — | — | — | — | — | — | — | 5:46 | — | — | — | — | — | — |
 | — | — | — | — | — | 5:10 | — | — | — | — | — | — | — | 5:09 | — | — | — | — | — | — | — | 5:08 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 20 | 19 | 20 | 23 | 24 | 21 | 20 | 19 | 19 | 19 | 20 | 22 | 24 | 23 | 22 | 22 | 21 | 21 | 23 | 25 | 25 | 25 | 22 |
Feels °C | 18 | 17 | 16 | 17 | 19 | 20 | 16 | 17 | 16 | 17 | 16 | 17 | 21 | 25 | 23 | 22 | 21 | 19 | 18 | 20 | 21 | 21 | 24 | 15 |
Swell 1 Height (m) Direction Period (s) | SE 16 | SE 15 | SE 14 | SE 16 | SE 15 | SE 15 | SE 15 | SE 14 | SE 14 | SE 14 | SE 13 | SE 13 | SE 12 | SE 12 | SE 12 | SE 11 | SE 11 | SE 10 | SE 10 | SE 10 | SE 9 | ESE 9 | ESE 9 | SSW 6 |
| kJ | 306 | 233 | 203 | 352 | 456 | 492 | 472 | 346 | 322 | 322 | 299 | 242 | 217 | 175 | 112 | 75 | 55 | 25 | 24 | 14 | 22 | 8 | 8 | 34 |
Swell 2 Height (m) Direction Period (s) | E 10 | SE 10 | SE 17 | ESE 9 | — | — | — | — | — | — | — | — | ENE 7 | E 8 | E 8 | E 7 | E 7 | E 8 | E 8 | ESE 9 | — | E 9 | SE 9 | ESE 8 |
| kJ | 234 | 25 | 143 | 8 | — | — | — | — | — | — | — | — | 18 | 19 | 19 | 9 | 9 | 5 | 5 | 9 | — | 42 | 20 | 7 |
Swell 3 Height (m) Direction Period (s) | — | — | SE 17 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | ESE 9 |
| kJ | — | — | 346 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 27 |
Wind waves Height (m) Direction Period (s) | NE 3 | NE 3 | NE 3 | NE 3 | NE 3 | NE 3 | ENE 3 | NE 3 | NE 3 | NNE 3 | NNE 3 | NNE 3 | — | — | — | — | — | — | SW 3 | SW 4 | SW 5 | SSW 5 | SSW 6 | N 2 |
| kJ | 2 | 2 | 4 | 4 | 4 | 3 | 5 | 5 | 2 | 2 | 1 | 1 | — | — | — | — | — | — | 2 | 15 | 65 | 106 | 77 | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 4 | 8 | 8 | 0 | 38 | 38 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 14 | 14 | 38 | 38 | 38 | 487 | 488 | 509 | 12 | 55 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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