Surf Forecasts:
How big are the waves at Rock Island today (15 Sep):
- Evening surf: Evening surf (15 Sep, local time) - 2.5ft (0.7m), 6s period with S swell.
The current surf forecast for Rock Island at 11PM is: 0.7m 6s primary swell from a South direction and 0.5m 6s secondary swell from a South-southwest direction (forecast issued at 08:00pm September 15). The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Sep) | - | - |
| Afternoon (15 Sep) | - | - |
| Evening (15 Sep) | 2.5ft (0.7m) | 6s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 40mm), heaviest during Wed morning. Warm (max 24°C on Tue night, min 18°C on Thu night). Winds increasing (light winds from the N on Tue night, strong winds from the NNE by Fri morning). | ||||||||||||||||||
Tue 15 | Wednesday 16 | Thursday 17 | ||||||||||||||||
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 6 | S 6 | S 6 | SE 7 | SE 7 | SE 7 | SE 7 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SSE 8 | SSE 8 | SSE 9 | SSE 9 | E 9 |
Wave Graph  | ||||||||||||||||||
 kJ | 26 | 35 | 36 | 22 | 12 | 12 | 13 | 17 | 17 | 17 | 17 | 10 | 10 | 7 | 6 | 8 | 8 | 7 |
Wind (km/h) | ||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off |
High Tide | 6:48PM1.52m | 7:55AM1.46m | 7:12PM1.51m | 8:47AM1.38m | 7:38PM1.50m | |||||||||||||
Low Tide | 1:21AM0.32m | 1:28PM0.80m | 2:02AM0.31m | 1:57PM0.92m | ||||||||||||||
 | |  | |  |  |  | | | | | | | |  | |  |  | |
 | — | — | — | 5:24 | — | — | — | — | — | — | — | 5:24 | — | — | — | — | — | — |
 | — | — | — | — | — | — | — | 5:47 | — | — | — | — | — | — | — | 5:46 | — | — |
mm | 3 | 2 | 1 | 4 | 3 | 7 | 11 | 1 | 1 | 1 | 2 | 2 | 4 | 1 | — | — | — | — |
Temp °C | 27 | 24 | 22 | 22 | 22 | 21 | 22 | 22 | 21 | 21 | 20 | 20 | 19 | 19 | 20 | 20 | 21 | 20 |
Feels °C | 31 | 26 | 22 | 22 | 22 | 21 | 21 | 22 | 20 | 19 | 18 | 17 | 16 | 15 | 17 | 15 | 16 | 15 |
Swell 1 Height (m) Direction Period (s) | S 6 | S 6 | S 6 | SE 7 | SE 7 | SE 7 | SE 7 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 | SSE 8 | SSE 8 | SSE 9 | SSE 9 | SSE 8 |
| kJ | 26 | 35 | 36 | 22 | 12 | 12 | 13 | 17 | 17 | 17 | 17 | 10 | 10 | 7 | 6 | 8 | 8 | 7 |
Swell 2 Height (m) Direction Period (s) | SE 8 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | S 5 | S 5 | S 5 | SE 9 | SE 7 | SE 8 | SE 7 | SE 7 | E 9 |
| kJ | 9 | 22 | 19 | 12 | 11 | 7 | 6 | 3 | 3 | 1 | 1 | 1 | 3 | 2 | 2 | 2 | 2 | 6 |
Swell 3 Height (m) Direction Period (s) | E 12 | E 14 | E 13 | S 9 | SE 9 | S 9 | SE 9 | SSW 6 | SSW 6 | E 12 | E 12 | E 12 | S 5 | S 5 | SE 10 | — | E 11 | SE 9 |
| kJ | 11 | 16 | 13 | 2 | 3 | 2 | 3 | 3 | 3 | 11 | 3 | 3 | 1 | 1 | 4 | — | 3 | 3 |
Wind waves Height (m) Direction Period (s) | SSW 6 | — | — | NNE 3 | NNE 3 | NNE 3 | NNE 2 | NE 2 | NE 3 | NE 3 | NNE 3 | NNE 3 | NNE 3 | NE 3 | NE 3 | NE 3 | ENE 4 | NE 4 |
| kJ | 22 | — | — | 1 | 1 | 1 | 1 | 1 | 2 | 3 | 3 | 4 | 4 | 5 | 5 | 5 | 14 | 17 |
Nearest Offshore or Glassy | ||||||||||||||||||
Distance (km) | 7 | 0 | 0 | 51 | 55 | 51 | 51 | 51 | 51 | 145 | 145 | 228 | 145 | 145 | 145 | 145 | 488 | 145 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||
Header Global | ||||||||||||||||||
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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