Surf Forecasts:
How big are the waves at Rock Island today (22 Sep):
- Morning surf: Morning surf (22 Sep, local time) - 3.5ft (1.0m), 9s period with SSE swell.
- 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 8AM is: 1.0m 10s primary swell from a South-southeast direction and 0.1m 8s secondary swell from a West direction (forecast issued at 02:00am September 22). An open ocean swell of 0.3m 2s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 Sep) | 3.5ft (1.0m) | 9s |
| 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 28°C on Tue morning, min 21°C on Wed morning). Wind will be generally light. | ||||||||||||||||||||||||
Tuesday 22 | Wednesday 23 | Thursday 24 | ||||||||||||||||||||||
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 | 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 12 | SSE 11 | SSE 10 | SSE 9 | SSE 9 | SSE 9 | SSE 8 | SSE 8 | S 8 | S 8 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SE 6 | SE 6 | SSE 5 | SSE 5 | S 8 | SE 8 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 1248 | 392 | 209 | 181 | 135 | 101 | 92 | 68 | 58 | 41 | 47 | 36 | 26 | 25 | 16 | 15 | 15 | 14 | 8 | 8 | 3 | 3 | 5 | 3 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | cross | cross-off | off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | off | off | off | off | off | off | glassy | cross-on | glassy | cross |
High Tide | 11:27PM1.28m | 3:27PM1.35m | 1:23AM1.30m | 3:54PM1.39m | 2:42AM1.37m | 4:18PM1.42m | ||||||||||||||||||
Low Tide | 7:40AM0.43m | 8:38PM1.08m | 8:43AM0.40m | 9:22PM0.95m | 9:33AM0.40m | |||||||||||||||||||
 |  |  | |  | |  | |  | | |  | | | | | | | |  | | | | | |
 | — | 5:28 | — | — | — | — | — | — | — | 5:28 | — | — | — | — | — | — | — | 5:30 | — | — | — | — | — | — |
 | — | — | — | — | — | 5:39 | — | — | — | — | — | — | — | 5:37 | — | — | — | — | — | — | — | 5:37 | — | — |
mm | — | — | — | — | — | — | — | — | 1 | 2 | — | 1 | 2 | 1 | 1 | 1 | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 27 | 28 | 26 | 25 | 25 | 24 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 23 | 25 | 26 | 25 | 25 |
Feels °C | 28 | 30 | 28 | 27 | 26 | 27 | 25 | 27 | 25 | 21 | 20 | 19 | 19 | 20 | 20 | 20 | 20 | 20 | 21 | 23 | 27 | 28 | 27 | 27 |
Swell 1 Height (m) Direction Period (s) | S 12 | SSE 11 | SSE 10 | SSE 9 | SSE 9 | SSE 9 | SSE 8 | SSE 8 | S 8 | S 8 | SSE 7 | SSE 7 | SSE 7 | SSE 7 | SSE 6 | SSE 6 | SSE 6 | SSE 6 | SE 6 | SE 6 | SSE 5 | SSE 5 | S 8 | SE 5 |
| kJ | 1248 | 392 | 209 | 181 | 135 | 101 | 92 | 68 | 58 | 41 | 47 | 36 | 26 | 25 | 16 | 15 | 15 | 14 | 8 | 8 | 3 | 3 | 5 | 1 |
Swell 2 Height (m) Direction Period (s) | NNW 5 | SW 8 | W 8 | E 9 | 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 | SE 8 | SE 8 | SE 8 | SE 8 | SE 5 | SE 8 |
| kJ | 8 | 15 | 1 | 7 | 2 | 5 | 2 | 2 | 2 | 3 | 3 | 2 | 2 | 8 | 3 | 1 | 3 | 3 | 3 | 3 | 3 | 3 | 1 | 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 | S 8 | S 8 | S 8 | S 8 | S 8 | S 8 |
| kJ | — | — | — | — | 2 | 2 | — | — | — | 2 | 2 | 2 | 2 | 7 | 1 | 3 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
Wind waves Height (m) Direction Period (s) | WSW 3 | — | — | ESE 2 | — | NE 2 | E 3 | — | — | E 2 | NE 2 | NE 3 | NNE 3 | NNE 3 | NNE 3 | NNE 3 | N 3 | N 2 | — | — | — | — | — | — |
| kJ | 9 | — | — | 1 | — | 1 | 2 | — | — | 1 | 1 | 3 | 3 | 3 | 3 | 2 | 1 | 1 | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 10 | 0 | 27 | 38 | 0 | 572 | 249 | 0 | 145 | 38 | 0 | 228 | 1424 | 1424 | 999 | 944 | 51 | 54 | 54 | 55 | 55 | 55 | 65 | 61 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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