Surf Forecasts:
How big are the waves at Rock Island today (22 Jul):
- Morning surf: Morning surf (22 Jul, local time) - 2ft (0.6m), 4s period with SSW swell.
- Afternoon surf: Afternoon surf (22 Jul, local time) - 1.5ft (0.5m), 4s period with S swell.
- Evening surf: Evening surf (22 Jul, local time) - 2ft (0.6m), 4s period with SSW swell.
The current surf forecast for Rock Island at 2AM is: 0.4m 4s primary swell from a South-southwest direction and 0.1m 8s secondary swell from a Southeast direction (forecast issued at 08:00pm July 21). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (22 Jul) | 2ft (0.6m) | 4s |
| Afternoon (22 Jul) | 1.5ft (0.5m) | 4s |
| Evening (22 Jul) | 2ft (0.6m) | 4s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 2mm), mostly falling on Thu night. Warm (max 31°C on Thu morning, min 26°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Tue 21 | Wednesday 22 | Thursday 23 | ||||||||||||||||
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) | SSW 4 | SSW 4 | SSW 4 | SW 4 | SW 4 | SSW 4 | S 4 | S 4 | SSW 4 | SSW 4 | SSW 5 | SW 6 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | SSE 10 | SSE 10 |
Wave Graph  | ||||||||||||||||||
 kJ | 14 | 15 | 11 | 16 | 14 | 11 | 7 | 7 | 13 | 14 | 19 | 44 | 17 | 15 | 13 | 13 | 10 | 12 |
Wind (km/h) | ||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-on | cross-on | on | on | on | on | on | on | glassy | off | cross-off | glassy | on | cross-on | cross |
High Tide | 9:33PM1.40m | 10:14AM1.18m | 10:05PM1.39m | 11:48AM1.12m | ||||||||||||||
Low Tide | 3:07PM0.59m | 4:07AM0.58m | 3:45PM0.75m | 5:11AM0.52m | 4:29PM0.91m | |||||||||||||
 |  | | |  | | | | | | | | | | | | |  | |
 | — | — | — | 4:41 | — | — | — | — | — | — | — | 4:43 | — | — | — | — | — | — |
 | 6:53 | — | — | — | — | — | — | — | 6:52 | — | — | — | — | — | — | — | 6:52 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 28 | 29 | 28 | 28 | 29 | 29 | 29 | 28 | 29 | 29 | 28 | 29 | 28 | 30 | 31 | 31 | 30 | 29 |
Feels °C | 30 | 32 | 32 | 32 | 33 | 33 | 32 | 31 | 32 | 31 | 32 | 34 | 32 | 34 | 35 | 34 | 33 | 34 |
Swell 1 Height (m) Direction Period (s) | S 8 | S 8 | SE 8 | SSW 4 | SSW 4 | SSW 4 | SE 8 | SE 8 | SE 11 | SE 11 | SE 11 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SE 10 | SSW 6 | SSE 10 |
| kJ | 1 | 1 | 2 | 7 | 7 | 3 | 2 | 2 | 5 | 5 | 5 | 18 | 17 | 12 | 13 | 4 | 6 | 10 |
Swell 2 Height (m) Direction Period (s) | SE 11 | SE 11 | SE 11 | SE 8 | SE 8 | SE 8 | S 11 | SE 11 | SE 8 | S 7 | S 7 | SE 11 | SE 10 | SSE 10 | SSE 10 | S 8 | SSE 10 | S 7 |
| kJ | 5 | 5 | 4 | 2 | 2 | 2 | 2 | 5 | 2 | 1 | 1 | 4 | 4 | 10 | 10 | 1 | 10 | 1 |
Swell 3 Height (m) Direction Period (s) | E 11 | E 11 | — | SE 11 | E 11 | SE 11 | E 10 | — | SE 7 | SE 7 | SE 7 | S 20 | SE 20 | SE 19 | S 19 | S 19 | SE 8 | SE 18 |
| kJ | 9 | 9 | — | 5 | 2 | 4 | 2 | — | 2 | 2 | 2 | 7 | 15 | 15 | 7 | 7 | 3 | 12 |
Wind waves Height (m) Direction Period (s) | SSW 4 | SSW 4 | SSW 4 | SW 4 | SW 4 | SSW 4 | S 4 | S 4 | SSW 4 | SSW 4 | SSW 5 | SW 6 | — | — | — | SSW 6 | S 3 | S 5 |
| kJ | 14 | 15 | 11 | 16 | 14 | 11 | 7 | 7 | 13 | 14 | 19 | 44 | — | — | — | 13 | 1 | 8 |
Nearest Offshore or Glassy | ||||||||||||||||||
Distance (km) | 534 | 77 | 76 | 76 | 16 | 76 | 534 | 1438 | 798 | 92 | 76 | 0 | 55 | 16 | 16 | 18 | 51 | 51 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||
Header Global | ||||||||||||||||||
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