Surf Forecasts:
How big are the waves at Rock Island today (05 Sep):
- Morning surf: Morning surf (05 Sep, local time) - 1.5ft (0.5m), 9s period with SSW swell.
- Afternoon surf: Afternoon surf (05 Sep, local time) - 1.5ft (0.4m), 9s period with SSW swell.
- Evening surf: Evening surf (05 Sep, local time) - 1ft (0.3m), 8s period with SSW swell.
The current surf forecast for Rock Island at 12AM is: 0.5m 9s primary swell from a South-southwest direction and 0.2m 6s secondary swell from a South-southeast direction (forecast issued at 08:00pm September 04). 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 (05 Sep) | 1.5ft (0.5m) | 9s |
| Afternoon (05 Sep) | 1.5ft (0.4m) | 9s |
| Evening (05 Sep) | 1ft (0.3m) | 8s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 371mm), heaviest during Sun night. Warm (max 25°C on Fri night, min 21°C on Fri night). Mainly near gales. | ||||||||||||||||||
Fri 4 | Saturday 5 | Sunday 6 | ||||||||||||||||
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) | S 10 | SSW 9 | SSW 9 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SE 8 | SSE 8 | SSE 8 | ESE 8 | ESE 9 | SE 8 |
Wave Graph  | ||||||||||||||||||
 kJ | 67 | 66 | 49 | 52 | 52 | 50 | 28 | 27 | 13 | 13 | 14 | 14 | 10 | 7 | 7 | 7 | 8 | 18 |
Wind (km/h) | ||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | off | off | off | off | off | off |
High Tide | 8:48PM1.44m | 12:35PM1.19m | 9:29PM1.40m | 2:50PM1.24m | ||||||||||||||
Low Tide | 4:36AM0.42m | 3:39PM1.14m | 5:57AM0.42m | 5:39PM1.22m | ||||||||||||||
 |  |  |  |  |  | | | |  | | | | | | |  |  | |
 | — | — | — | 5:16 | — | — | — | — | — | — | — | 5:16 | — | — | — | — | — | — |
 | 6:05 | — | — | — | — | — | — | — | 6:04 | — | — | — | — | — | — | — | 6:02 | — |
mm | — | — | 1 | 15 | 23 | 4 | 1 | — | — | — | — | — | — | — | — | 2 | 7 | 10 |
Temp °C | 26 | 25 | 24 | 22 | 21 | 22 | 21 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 22 | 21 | 22 |
Feels °C | 27 | 25 | 24 | 21 | 20 | 21 | 20 | 21 | 21 | 20 | 20 | 19 | 18 | 18 | 19 | 17 | 17 | 18 |
Swell 1 Height (m) Direction Period (s) | S 10 | SSW 9 | SSW 9 | SSW 10 | SSW 10 | SSW 9 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | SE 8 | SSE 8 | SSE 8 | ESE 8 | ESE 9 | S 9 |
| kJ | 67 | 66 | 49 | 52 | 52 | 50 | 28 | 27 | 13 | 13 | 14 | 14 | 10 | 7 | 7 | 7 | 8 | 15 |
Swell 2 Height (m) Direction Period (s) | SE 6 | SE 6 | SSE 6 | SE 9 | SE 9 | SE 8 | SE 8 | ESE 7 | SE 6 | ESE 7 | SE 8 | SSE 8 | SSW 8 | SSW 8 | ESE 8 | SSE 8 | SSE 8 | SE 8 |
| kJ | 7 | 6 | 4 | 12 | 12 | 11 | 3 | 4 | 2 | 4 | 11 | 7 | 7 | 7 | 6 | 6 | 6 | 18 |
Swell 3 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 9 | E 9 | E 9 | SE 9 | SE 6 | E 3 | SW 10 | SW 9 | SW 10 | SE 7 | SW 9 | SE 7 | S 8 | S 8 | S 9 | SSE 7 |
| kJ | 3 | 3 | 3 | 6 | 6 | 12 | 2 | 1 | 4 | 3 | 4 | 2 | 3 | 2 | 1 | 1 | 7 | 10 |
Wind waves Height (m) Direction Period (s) | — | — | NE 3 | ENE 3 | E 3 | E 4 | ENE 3 | — | NE 2 | NE 3 | NE 3 | NNE 3 | NNE 4 | NNE 4 | NNE 4 | NNE 4 | NNE 4 | NNE 4 |
| kJ | — | — | 2 | 3 | 3 | 3 | 2 | — | 1 | 2 | 4 | 8 | 16 | 18 | 18 | 16 | 27 | 29 |
Nearest Offshore or Glassy | ||||||||||||||||||
Distance (km) | 2 | 12 | 0 | 38 | 228 | 12 | 38 | 38 | 38 | 552 | 487 | 487 | 487 | 487 | 470 | 552 | 552 | 488 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||
Header Global | ||||||||||||||||||
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