Surf Forecasts:
How big are the waves at Rock Island today (30 Sep):
- Morning surf: Morning surf (30 Sep, local time) - 2ft (0.6m), 12s period with SSW swell.
- Afternoon surf: Afternoon surf (30 Sep, local time) - 2ft (0.6m), 11s period with SSW swell.
- Evening surf: Evening surf (30 Sep, local time) - 2.5ft (0.8m), 10s period with SSW swell.
The current surf forecast for Rock Island at 2AM is: 0.6m 13s primary swell from a South-southwest direction and 0.3m 5s secondary swell from a Southeast direction (forecast issued at 08:00pm September 29). An open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 Sep) | 2ft (0.6m) | 12s |
| Afternoon (30 Sep) | 2ft (0.6m) | 11s |
| Evening (30 Sep) | 2.5ft (0.8m) | 10s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 32mm), heaviest during Tue night. Warm (max 24°C on Thu afternoon, min 18°C on Tue night). Wind will be generally light. | ||||||||||||||||||
Tue 29 | Wednesday 30 | Thursday 1 | ||||||||||||||||
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) | SW 14 | SW 13 | SW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | S 10 | S 9 | S 9 | SSE 9 | SSE 8 |
Wave Graph  | ||||||||||||||||||
 kJ | 46 | 63 | 84 | 108 | 98 | 91 | 81 | 78 | 105 | 125 | 116 | 133 | 163 | 154 | 170 | 230 | 232 | 180 |
Wind (km/h) | ||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | glassy |
High Tide | 6:11PM1.53m | 7:30AM1.50m | 6:36PM1.53m | 8:19AM1.43m | 7:01PM1.52m | |||||||||||||
Low Tide | 00:49AM0.25m | 1:00PM0.83m | 1:28AM0.23m | 1:30PM0.94m | ||||||||||||||
 |  | | |  | | | | |  | | | | | |  |  |  | |
 | — | — | — | 5:35 | — | — | — | — | — | — | — | 5:35 | — | — | — | — | — | — |
 | — | — | — | — | — | — | — | 5:28 | — | — | — | — | — | — | — | 5:27 | — | — |
mm | 7 | 4 | 6 | 3 | 3 | 2 | 1 | 1 | 1 | — | 1 | 1 | 2 | 4 | 2 | — | — | — |
Temp °C | 20 | 18 | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 19 | 19 | 19 | 20 | 23 | 24 | 24 |
Feels °C | 19 | 16 | 18 | 18 | 19 | 18 | 17 | 17 | 17 | 17 | 15 | 17 | 17 | 17 | 18 | 22 | 26 | 27 |
Swell 1 Height (m) Direction Period (s) | S 6 | SSW 6 | SW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | S 10 | S 9 | S 9 | SSE 9 | SSE 8 |
| kJ | 21 | 13 | 84 | 108 | 98 | 91 | 81 | 78 | 105 | 125 | 116 | 133 | 163 | 154 | 170 | 230 | 232 | 180 |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 13 | S 6 | SE 5 | SE 9 | SE 6 | SE 6 | SE 7 | SE 7 | SE 7 | SE 7 | E 6 | SE 11 | SE 11 | ESE 6 | — | NNE 3 | — |
| kJ | 46 | 63 | 12 | 4 | 3 | 1 | 2 | 2 | 2 | 2 | 2 | 1 | 5 | 5 | 11 | — | 2 | — |
Swell 3 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | SE 9 | SSE 9 | SE 8 | SE 9 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 11 | SE 8 | E 12 | — | — | — |
| kJ | 3 | 3 | 3 | 3 | 8 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 5 | 3 | 3 | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | NE 3 | NE 3 | E 5 | NE 2 | NE 2 | NE 3 | NE 3 | NNE 3 | NNE 3 | NNE 3 | NNE 3 | NNE 3 | N 3 | NNE 3 | — | — |
| kJ | — | — | 2 | 2 | 2 | 1 | 1 | 1 | 2 | 3 | 3 | 2 | 3 | 3 | 4 | 2 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||
Distance (km) | 0 | 12 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||
Header Global | ||||||||||||||||||
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Live Wave Height (m)
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