Surf Forecasts:
How big are the waves at Rock Island today (28 Sep):
- Morning surf: Morning surf (28 Sep, local time) - 3.5ft (1.0m), 5s period with SSW swell.
- Afternoon surf: Afternoon surf (28 Sep, local time) - 3.5ft (1.0m), 6s period with SSW swell.
- Evening surf: Evening surf (28 Sep, local time) - 3ft (0.9m), 7s period with SSW swell.
The current surf forecast for Rock Island at 12PM is: 1.2m 6s primary swell from a South-southwest direction and 0.1m 10s secondary swell from a Southeast direction (forecast issued at 08:00am September 28). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (28 Sep) | 3.5ft (1.0m) | 5s |
| Afternoon (28 Sep) | 3.5ft (1.0m) | 6s |
| Evening (28 Sep) | 3ft (0.9m) | 7s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 75mm), heaviest during Mon afternoon. Warm (max 24°C on Mon morning, min 18°C on Tue afternoon). Wind will be generally light. | ||||||||||||||||||||||
Monday 28 | Tuesday 29 | Wednesday 30 | ||||||||||||||||||||
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 6 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | SSW 7 | S 7 | S 7 | S 7 | S 7 | SW 14 | SW 14 | SW 13 | SW 13 | SW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 |
Wave Graph  | ||||||||||||||||||||||
 kJ | 31 | 42 | 84 | 58 | 131 | 77 | 77 | 47 | 45 | 34 | 31 | 31 | 46 | 44 | 39 | 56 | 55 | 49 | 49 | 71 | 82 | 81 |
Wind (km/h) | ||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | off | cross-off | cross-off | off | off | off | off | off | off | off | off | off | off | cross-off | cross-off | off | off |
High Tide | 6:01AM1.58m | 5:48PM1.52m | 6:45AM1.56m | 6:11PM1.53m | 7:30AM1.50m | 6:36PM1.53m | ||||||||||||||||
Low Tide | 11:59AM0.62m | 00:13AM0.30m | 12:30PM0.72m | 00:49AM0.25m | 1:00PM0.83m | |||||||||||||||||
 |  |  |  |  |  | | | | | |  |  |  | |  | | |  | | | | |
 | 5:33 | — | — | — | — | — | — | 5:33 | — | — | — | — | — | — | — | 5:35 | — | — | — | — | — | — |
 | — | — | — | 5:30 | — | — | — | — | — | — | — | 5:30 | — | — | — | — | — | — | — | 5:28 | — | — |
mm | 2 | — | 5 | 24 | 1 | — | — | — | 1 | 1 | 2 | 8 | 11 | 8 | 8 | 2 | 1 | 1 | — | — | 1 | 1 |
Temp °C | 23 | 24 | 23 | 22 | 24 | 23 | 23 | 23 | 22 | 22 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 19 | 19 |
Feels °C | 22 | 23 | 23 | 24 | 25 | 25 | 26 | 26 | 24 | 22 | 17 | 15 | 17 | 17 | 18 | 17 | 17 | 18 | 18 | 18 | 18 | 18 |
Swell 1 Height (m) Direction Period (s) | SE 9 | SE 9 | — | SSW 6 | SSW 6 | SSW 7 | S 7 | S 7 | S 7 | S 7 | S 7 | SSW 7 | SSW 6 | SW 13 | SW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 |
| kJ | 3 | 3 | — | 42 | 33 | 77 | 77 | 47 | 45 | 34 | 23 | 15 | 14 | 44 | 39 | 56 | 55 | 49 | 49 | 71 | 82 | 81 |
Swell 2 Height (m) Direction Period (s) | S 13 | — | SE 10 | SE 9 | SE 10 | — | SW 16 | SW 15 | SW 14 | SW 13 | SW 14 | SW 14 | SW 13 | SSW 6 | S 6 | SE 9 | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 |
| kJ | 4 | — | 4 | 3 | 4 | — | 9 | 8 | 29 | 28 | 31 | 31 | 46 | 14 | 7 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
Swell 3 Height (m) Direction Period (s) | — | — | E 9 | E 8 | SE 8 | — | S 13 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | — | SSE 9 | SSE 9 | SSE 9 | S 12 | SE 12 | SE 12 |
| kJ | — | — | 1 | 1 | 3 | — | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | — | 8 | 7 | 7 | 3 | 6 | 5 |
Wind waves Height (m) Direction Period (s) | SSW 6 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | — | — | — | — | — | NNE 2 | N 2 | NNE 2 | NNE 3 | NNE 3 | — | — | — | ENE 2 | NE 3 | NE 3 | NE 6 |
| kJ | 31 | 42 | 84 | 58 | 131 | — | — | — | — | — | 1 | 1 | 1 | 4 | 3 | — | — | — | 1 | 1 | 2 | 2 |
Nearest Offshore or Glassy | ||||||||||||||||||||||
Distance (km) | 509 | 509 | 470 | 27 | 29 | 0 | 0 | 0 | 0 | 0 | 0 | 74 | 0 | 0 | 136 | 0 | 0 | 0 | 10 | 0 | 0 | 0 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||
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