Surf Forecasts:
How big are the waves at Rock Island today (30 Aug):
- Morning surf: Morning surf (30 Aug, local time) - 1.5ft (0.4m), 7s period with SSW swell.
- Afternoon surf: Afternoon surf (30 Aug, local time) - 1.5ft (0.4m), 7s period with SSW swell.
- Evening surf: Evening surf (30 Aug, local time) - 1ft (0.3m), 7s period with SSW swell.
The current surf forecast for Rock Island at 1PM is: 0.4m 7s primary swell from a South-southwest direction and 0.2m 10s secondary swell from a South-southeast direction (forecast issued at 08:00am August 30). The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 Aug) | 1.5ft (0.4m) | 7s |
| Afternoon (30 Aug) | 1.5ft (0.4m) | 7s |
| Evening (30 Aug) | 1ft (0.3m) | 7s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 29°C on Tue afternoon, min 22°C on Sun morning). Wind will be generally light. | ||||||||||||||||||||||
Sunday 30 | Monday 31 | Tuesday 1 | ||||||||||||||||||||
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) | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSE 10 | SSE 10 | SSE 9 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | E 12 | SSW 9 | SSW 9 | SSW 8 | SSW 8 |
Wave Graph  | ||||||||||||||||||||||
 kJ | 17 | 18 | 18 | 18 | 10 | 10 | 11 | 10 | 10 | 11 | 9 | 9 | 9 | 16 | 15 | 15 | 14 | 14 | 15 | 15 | 13 | 13 |
Wind (km/h) | ||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | cross-off | glassy | off | off | off | off | off | off | cross-off | cross-off | cross-off | off | off | off | off | cross-off | cross-off | cross-on | cross-on |
High Tide | 6:04AM1.58m | 6:41PM1.49m | 6:48AM1.55m | 7:03PM1.50m | 7:33AM1.49m | 7:26PM1.50m | ||||||||||||||||
Low Tide | 12:27PM0.39m | 00:39AM0.52m | 12:58PM0.50m | 1:16AM0.45m | 1:29PM0.63m | |||||||||||||||||
 |  | |  |  |  |  | | | | | | | | | | | | | | |  | |
 | 5:11 | — | — | — | — | — | — | 5:11 | — | — | — | — | — | — | — | 5:13 | — | — | — | — | — | — |
 | — | — | — | — | 6:12 | — | — | — | — | — | — | — | 6:10 | — | — | — | — | — | — | — | 6:09 | — |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 22 | 23 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 27 | 27 | 26 | 24 | 24 | 24 | 24 | 25 | 27 | 29 | 28 | 27 |
Feels °C | 21 | 22 | 24 | 26 | 28 | 28 | 29 | 28 | 27 | 26 | 29 | 29 | 28 | 24 | 25 | 25 | 25 | 26 | 29 | 32 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 8 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SSW 9 | SSW 9 | SSW 8 | SSW 8 |
| kJ | 17 | 18 | 18 | 18 | 10 | 10 | 11 | 10 | 10 | 11 | 5 | 5 | 6 | 16 | 15 | 15 | 14 | 14 | 15 | 15 | 13 | 13 |
Swell 2 Height (m) Direction Period (s) | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 10 | SSE 9 | SSE 9 | SSE 9 | SSE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 |
| kJ | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 4 | 4 | 4 | 4 | 4 | 4 |
Swell 3 Height (m) Direction Period (s) | SE 12 | E 11 | SE 9 | SSW 6 | SSW 6 | E 5 | — | E 15 | — | E 14 | E 14 | E 13 | S 10 | E 13 | E 13 | E 12 | E 12 | E 12 | E 12 | E 12 | E 11 | E 11 |
| kJ | 6 | 2 | 3 | 7 | 7 | 1 | — | 4 | — | 4 | 4 | 3 | 2 | 3 | 3 | 3 | 3 | 11 | 11 | 11 | 10 | 10 |
Wind waves Height (m) Direction Period (s) | NNE 2 | NNE 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | NE 2 | NE 2 | NNE 2 | — | — | — | — |
| kJ | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||
Distance (km) | 54 | 54 | 55 | 16 | 61 | 55 | 55 | 55 | 55 | 145 | 145 | 51 | 51 | 51 | 54 | 38 | 38 | 54 | 16 | 38 | 38 | 16 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||
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