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 (0.7m), 10s period with SSW swell.
The current surf forecast for Rock Island at 3PM is: 0.6m 11s primary swell from a South-southwest direction and 0.1m 8s secondary swell from a Southeast direction (forecast issued at 08:00am September 30). An open ocean swell of 0.3m 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 (0.7m) | 10s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 23mm), heaviest during Wed morning. Warm (max 26°C on Thu afternoon, min 18°C on Wed morning). Mainly fresh winds. | ||||||||||||||||||||||
Wednesday 30 | Thursday 1 | Friday 2 | ||||||||||||||||||||
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 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 9 | S 9 | S 9 | S 9 | S 8 | S 8 | SSE 8 | SSE 8 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 6 | SSE 6 | SSE 6 |
Wave Graph  | ||||||||||||||||||||||
 kJ | 129 | 91 | 81 | 78 | 105 | 95 | 77 | 92 | 108 | 103 | 95 | 108 | 131 | 105 | 75 | 55 | 37 | 26 | 18 | 16 | 8 | 4 |
Wind (km/h) | ||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | off | off | off | off | off | off | cross | cross-on | cross | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off |
High Tide | 7:30AM1.50m | 6:36PM1.53m | 8:19AM1.43m | 7:01PM1.52m | 9:17AM1.35m | 7:29PM1.49m | ||||||||||||||||
Low Tide | 1:00PM0.83m | 1:28AM0.23m | 1:30PM0.94m | 2:11AM0.25m | 2:01PM1.04m | |||||||||||||||||
 |  |  | |  |  | | |  | |  |  |  | | | | | | | | | | |
 | 5:35 | — | — | — | — | — | — | 5:35 | — | — | — | — | — | — | — | 5:35 | — | — | — | — | — | — |
 | — | — | — | 5:28 | — | — | — | — | — | — | — | 5:27 | — | — | — | — | — | — | — | 5:24 | — | — |
mm | 10 | 14 | 5 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | 1 |
Temp °C | 18 | 18 | 18 | 19 | 19 | 19 | 19 | 20 | 20 | 21 | 23 | 26 | 24 | 23 | 23 | 22 | 21 | 21 | 20 | 19 | 19 | 19 |
Feels °C | 17 | 16 | 16 | 17 | 17 | 16 | 16 | 18 | 18 | 19 | 20 | 26 | 27 | 24 | 24 | 21 | 17 | 18 | 17 | 16 | 17 | 17 |
Swell 1 Height (m) Direction Period (s) | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 9 | S 9 | S 9 | S 9 | S 8 | S 8 | SSE 8 | SSE 8 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 6 | SSE 6 | SSE 6 |
| kJ | 129 | 91 | 81 | 78 | 105 | 95 | 77 | 92 | 108 | 103 | 95 | 108 | 131 | 105 | 75 | 55 | 37 | 26 | 18 | 16 | 8 | 4 |
Swell 2 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 8 | SE 8 | SE 8 | E 7 | SE 8 | E 6 | SE 11 | SE 11 | SE 11 | NNE 3 | SE 10 | SE 10 | E 11 | SSE 10 | E 11 | E 11 | SE 9 | SE 10 | SE 9 | SE 8 |
| kJ | 3 | 3 | 3 | 3 | 3 | 1 | 3 | 1 | 5 | 5 | 5 | 2 | 26 | 26 | 2 | 9 | 2 | 2 | 14 | 4 | 3 | 2 |
Swell 3 Height (m) Direction Period (s) | SE 9 | E 6 | E 6 | E 6 | E 7 | SE 8 | E 7 | SE 11 | SE 8 | SE 8 | — | E 6 | — | — | — | E 11 | — | E 16 | E 16 | — | S 8 | SE 9 |
| kJ | 13 | 1 | 1 | 1 | 1 | 3 | 1 | 5 | 3 | 3 | — | 3 | — | — | — | 2 | — | 5 | 5 | — | 1 | 3 |
Wind waves Height (m) Direction Period (s) | NNE 3 | NNE 2 | NE 3 | NNE 3 | NNE 3 | NNE 3 | N 3 | NNE 3 | NNE 3 | NNE 3 | NNE 3 | N 3 | — | — | — | — | NNE 3 | NE 3 | NE 3 | NE 3 | ENE 3 | ENE 2 |
| kJ | 3 | 1 | 2 | 1 | 2 | 3 | 3 | 3 | 3 | 3 | 2 | 1 | — | — | — | — | 3 | 6 | 5 | 3 | 2 | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 0 | 0 | 0 | 142 | 0 | 0 | 38 | 12 | 17 | 51 | 145 | 3754 | 136 | 142 | 142 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||
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