Surf Forecasts:
How big are the waves at Rock Island today (08 Sep):
- Afternoon surf: Afternoon surf (08 Sep, local time) - 3.5ft (1.1m), 9s period with S swell.
- Evening surf: Evening surf (08 Sep, local time) - 3.5ft (1.1m), 10s period with SSW swell.
The current surf forecast for Rock Island at 7PM is: 1.1m 9s primary swell from a South direction and 0.1m 10s secondary swell from a East direction, 0.6m 4s secondary swell from a South direction (forecast issued at 02:00pm September 08). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (08 Sep) | - | - |
| Afternoon (08 Sep) | 3.5ft (1.1m) | 9s |
| Evening (08 Sep) | 3.5ft (1.1m) | 10s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 31mm), heaviest during Thu morning. Warm (max 29°C on Wed morning, min 19°C on Thu morning). Mainly fresh winds. | ||||||||||||||||||||
Tue 8 | Wednesday 9 | Thursday 10 | ||||||||||||||||||
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) | S 9 | S 9 | S 9 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | S 8 | SSW 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 8 | S 8 | S 8 | S 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 234 | 196 | 196 | 235 | 370 | 163 | 386 | 576 | 560 | 517 | 413 | 306 | 258 | 220 | 181 | 145 | 115 | 89 | 86 | 65 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | on | on | on | on | cross-off | off | off | off | off | off | off | off | off | off |
High Tide | 4:09PM1.37m | 2:05AM1.36m | 4:34PM1.41m | 3:13AM1.43m | 4:57PM1.44m | |||||||||||||||
Low Tide | 9:11PM1.08m | 9:25AM0.32m | 9:53PM0.96m | 10:09AM0.31m | ||||||||||||||||
 | |  |  | | |  | | | |  |  |  | |  | | | | | | |
 | — | — | — | — | — | 5:18 | — | — | — | — | — | — | — | 5:20 | — | — | — | — | — | — |
 | — | — | 6:00 | — | — | — | — | — | — | 5:58 | — | — | — | — | — | — | — | 5:57 | — | — |
mm | — | — | 1 | 1 | 2 | 1 | — | — | — | — | 2 | — | 2 | 1 | 2 | 3 | 1 | 3 | 3 | 2 |
Temp °C | 26 | 28 | 28 | 27 | 27 | 27 | 27 | 28 | 29 | 29 | 25 | 23 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 |
Feels °C | 29 | 28 | 28 | 27 | 26 | 27 | 26 | 27 | 28 | 28 | 24 | 20 | 16 | 16 | 18 | 17 | 16 | 16 | 16 | 17 |
Swell 1 Height (m) Direction Period (s) | S 9 | S 9 | S 9 | SSE 8 | SSE 8 | SSW 10 | SSE 8 | E 12 | E 12 | E 12 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 8 | S 8 | S 8 | S 8 |
| kJ | 234 | 196 | 196 | 37 | 36 | 163 | 147 | 3 | 3 | 3 | 413 | 306 | 258 | 220 | 181 | 145 | 115 | 89 | 86 | 65 |
Swell 2 Height (m) Direction Period (s) | E 10 | E 10 | E 10 | — | SE 12 | SSE 8 | E 12 | SE 12 | E 17 | ESE 10 | E 12 | ESE 10 | ESE 10 | ESE 9 | ESE 9 | — | E 11 | ESE 10 | — | SE 9 |
| kJ | 2 | 2 | 2 | — | 6 | 26 | 3 | 6 | 6 | 10 | 3 | 10 | 9 | 8 | 9 | — | 2 | 10 | — | 3 |
Swell 3 Height (m) Direction Period (s) | SE 10 | ESE 10 | SE 10 | E 12 | E 18 | E 12 | SE 12 | E 17 | E 12 | E 16 | SE 10 | E 16 | SE 11 | SE 11 | SE 11 | E 15 | E 15 | E 15 | E 15 | E 16 |
| kJ | 16 | 10 | 16 | 3 | 6 | 3 | 6 | 6 | 3 | 5 | 14 | 5 | 5 | 5 | 5 | 4 | 4 | 17 | 18 | 5 |
Wind waves Height (m) Direction Period (s) | — | S 3 | S 4 | SSW 10 | SSW 10 | S 6 | SSW 10 | S 8 | SSW 9 | S 9 | — | — | NNE 4 | NNE 4 | NNE 4 | NNE 3 | N 3 | N 3 | N 3 | NNE 3 |
| kJ | — | 3 | 9 | 235 | 370 | 143 | 386 | 576 | 560 | 517 | — | — | 13 | 12 | 7 | 4 | 6 | 8 | 6 | 6 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 18 | 77 | 92 | 491 | 491 | 136 | 136 | 518 | 488 | 552 | 38 | 38 | 136 | 228 | 4 | 145 | 7 | 38 | 38 | 7 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
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