Surf Forecasts:
How big are the waves at Rock Island today (22 Sep):
- Afternoon surf: Afternoon surf (22 Sep, local time) - 2.5ft (0.8m), 9s period with SSE swell.
- Evening surf: Evening surf (22 Sep, local time) - 2.5ft (0.7m), 8s period with SSE swell.
The current surf forecast for Rock Island at 8PM is: 0.7m 8s primary swell from a South-southeast direction and 0.1m 10s secondary swell from a East direction, 0.4m 3s secondary swell from a East-southeast direction (forecast issued at 02:00pm September 22). The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 Sep) | - | - |
| Afternoon (22 Sep) | 2.5ft (0.8m) | 9s |
| Evening (22 Sep) | 2.5ft (0.7m) | 8s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 10mm), heaviest on Tue night. Warm (max 27°C on Tue afternoon, min 21°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||
Tue 22 | Wednesday 23 | Thursday 24 | ||||||||||||||||||
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 | SSE 9 | SSE 8 | SSE 8 | SSE 8 | S 8 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 6 | SSE 6 | SE 6 | SE 6 | SSE 6 | SE 6 | SE 6 | SE 6 | SSE 5 | SSE 5 |
Wave Graph  | ||||||||||||||||||||
 kJ | 165 | 99 | 92 | 68 | 62 | 41 | 43 | 27 | 26 | 25 | 16 | 15 | 18 | 18 | 14 | 9 | 8 | 5 | 3 | 3 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | off | off | off | off | off | glassy | on | on | cross-off |
High Tide | 3:27PM1.35m | 1:23AM1.30m | 3:54PM1.39m | 2:42AM1.37m | 4:18PM1.42m | |||||||||||||||
Low Tide | 8:38PM1.08m | 8:43AM0.40m | 9:22PM0.95m | 9:33AM0.40m | ||||||||||||||||
 | |  | |  | |  |  | | | | | |  | |  | | | | | |
 | — | — | — | — | — | 5:28 | — | — | — | — | — | — | — | 5:30 | — | — | — | — | — | — |
 | — | 5:39 | — | — | — | — | — | — | — | 5:37 | — | — | — | — | — | — | — | 5:37 | — | — |
mm | — | — | — | — | 2 | 3 | 2 | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — |
Temp °C | 29 | 27 | 26 | 25 | 24 | 22 | 22 | 21 | 21 | 21 | 22 | 21 | 21 | 21 | 21 | 22 | 24 | 25 | 25 | 25 |
Feels °C | 28 | 26 | 26 | 27 | 25 | 22 | 21 | 19 | 19 | 19 | 21 | 19 | 20 | 20 | 21 | 22 | 26 | 27 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | S 9 | SSE 9 | SSE 8 | SSE 8 | SSE 8 | S 8 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 6 | SSE 6 | SE 6 | SE 6 | SSE 6 | SE 6 | SE 6 | SE 6 | SSE 5 | SSE 5 |
| kJ | 165 | 99 | 92 | 68 | 62 | 41 | 43 | 27 | 26 | 25 | 16 | 15 | 18 | 18 | 14 | 9 | 8 | 5 | 3 | 3 |
Swell 2 Height (m) Direction Period (s) | SW 8 | WSW 7 | E 10 | E 10 | E 10 | SE 9 | SE 9 | S 9 | S 9 | SSE 9 | SE 9 | S 8 | SE 8 | SE 8 | S 8 | SE 8 | SE 8 | SE 8 | SE 8 | SE 8 |
| kJ | 2 | 5 | 2 | 2 | 2 | 3 | 3 | 2 | 2 | 8 | 3 | 1 | 3 | 3 | 1 | 3 | 3 | 3 | 3 | 3 |
Swell 3 Height (m) Direction Period (s) | E 10 | E 10 | — | — | — | E 10 | E 10 | E 10 | E 10 | SSW 8 | S 8 | SE 9 | S 8 | S 8 | SE 8 | S 8 | S 8 | S 8 | S 8 | S 8 |
| kJ | 2 | 2 | — | — | — | 2 | 2 | 2 | 2 | 7 | 1 | 3 | 1 | 1 | 3 | 1 | 1 | 1 | 1 | 1 |
Wind waves Height (m) Direction Period (s) | — | — | ESE 3 | — | ESE 4 | SE 4 | — | NE 2 | NE 3 | NE 3 | NNE 3 | NNE 3 | N 3 | N 2 | — | — | — | — | — | — |
| kJ | — | — | 4 | — | 10 | 5 | — | 2 | 2 | 2 | 1 | 1 | 1 | 1 | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 0 | 64 | 249 | 0 | 0 | 228 | 228 | 228 | 1424 | 1424 | 841 | 77 | 54 | 54 | 54 | 54 | 55 | 55 | 55 | 61 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
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