Surf Forecasts:
How big are the waves at Rock Island today (04 Aug):
- Afternoon surf: Afternoon surf (04 Aug, local time) - 5ft (1.6m), 16s period with SE swell.
- Evening surf: Evening surf (04 Aug, local time) - 6.5ft (2.0m), 16s period with SE swell.
The current surf forecast for Rock Island at 6PM is: 1.8m 16s primary swell from a Southeast direction and 0.1m 13s secondary swell from a East direction (forecast issued at 02:00pm August 04). The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (04 Aug) | - | - |
| Afternoon (04 Aug) | 5ft (1.6m) | 16s |
| Evening (04 Aug) | 6.5ft (2.0m) | 16s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 3mm), mostly falling on Thu night. Warm (max 30°C on Thu morning, min 23°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Tue 4 | Wednesday 5 | Thursday 6 | ||||||||||||||||||
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) | SE 16 | SE 16 | SE 16 | SE 16 | SE 16 | SE 16 | SE 14 | SSE 15 | SSE 15 | SSE 15 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | S 14 | S 14 | S 15 | S 15 |
Wave Graph  | ||||||||||||||||||||
 kJ | 1364 | 1347 | 1571 | 2027 | 2107 | 2185 | 1179 | 2348 | 2198 | 2090 | 2061 | 1956 | 1809 | 1628 | 1581 | 1519 | 1483 | 1809 | 2027 | 2023 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-off | cross-off | off | off | off | off | off | off | cross-off | cross-off | cross-off | off | off | off | off | cross-off | on | on | cross |
High Tide | 8:48PM1.44m | 9:29AM1.26m | 9:16PM1.43m | 10:48AM1.17m | ||||||||||||||||
Low Tide | 2:32PM0.59m | 3:17AM0.54m | 3:04PM0.75m | 4:14AM0.50m | 3:39PM0.90m | |||||||||||||||
 | | |  |  | |  | |  | | | | | | | | | | | | |
 | — | — | — | — | — | 4:52 | — | — | — | — | — | — | — | 4:52 | — | — | — | — | — | — |
 | — | — | 6:43 | — | — | — | — | — | — | — | 6:42 | — | — | — | — | — | — | — | 6:40 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 28 | 26 | 24 | 23 | 23 | 23 | 24 | 26 | 28 | 28 | 27 | 25 | 25 | 25 | 27 | 30 | 29 | 28 | 27 |
Feels °C | 24 | 25 | 24 | 22 | 21 | 20 | 20 | 21 | 25 | 29 | 29 | 29 | 27 | 27 | 27 | 29 | 34 | 31 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | SE 16 | SE 16 | SE 16 | SE 16 | SE 16 | SE 16 | SE 14 | SSE 15 | SSE 15 | SSE 15 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | SSE 14 | S 14 | S 14 | S 15 | S 15 |
| kJ | 1364 | 1347 | 1571 | 2027 | 2107 | 2185 | 1179 | 2348 | 2198 | 2090 | 2061 | 1956 | 1809 | 1628 | 1581 | 1519 | 1483 | 1809 | 2027 | 2023 |
Swell 2 Height (m) Direction Period (s) | — | E 13 | E 13 | — | — | E 13 | SSE 17 | — | — | — | — | — | — | — | — | ESE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 |
| kJ | — | 3 | 3 | — | — | 13 | 973 | — | — | — | — | — | — | — | — | 80 | 146 | 116 | 108 | 114 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | NNE 4 | NNE 4 | NNE 4 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | 21 | 22 | 16 | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 38 | 38 | 54 | 491 | 491 | 7 | 8 | 552 | 0 | 6 | 38 | 12 | 0 | 0 | 0 | 0 | 0 | 18 | 38 | 12 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
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