Surf Forecasts:
How big are the waves at Rock Island today (23 Jul):
- Evening surf: Evening surf (23 Jul, local time) - 2.5ft (0.8m), 5s period with SSW swell.
The current surf forecast for Rock Island at 12AM is: 0.6m 5s primary swell from a South-southwest direction and 0.1m 11s secondary swell from a Southeast direction, 0.1m 7s secondary swell from a South direction (forecast issued at 08:00pm July 22). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (23 Jul) | - | - |
| Afternoon (23 Jul) | - | - |
| Evening (23 Jul) | 2.5ft (0.8m) | 5s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 8mm), mostly falling on Thu night. Warm (max 32°C on Thu morning, min 26°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Wed 22 | Thursday 23 | Friday 24 | ||||||||||||||||
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 5 | SSW 5 | SSW 5 | SW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSE 10 | SSE 10 | SSE 10 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | SE 11 | SE 11 |
Wave Graph  | ||||||||||||||||||
 kJ | 17 | 25 | 17 | 46 | 20 | 15 | 13 | 13 | 7 | 10 | 12 | 12 | 12 | 12 | 12 | 11 | 18 | 18 |
Wind (km/h) | ||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-off | off | cross-off | cross-off | cross-on | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | on | on | cross-on | cross |
High Tide | 10:05PM1.39m | 11:48AM1.12m | 10:43PM1.38m | 1:49PM1.13m | ||||||||||||||
Low Tide | 3:45PM0.75m | 5:11AM0.52m | 4:29PM0.91m | 6:22AM0.44m | 5:30PM1.04m | |||||||||||||
 |  | | | | | | | |  |  |  |  |  | | |  | | |
 | — | — | — | 4:43 | — | — | — | — | — | — | — | 4:43 | — | — | — | — | — | — |
 | 6:52 | — | — | — | — | — | — | — | 6:52 | — | — | — | — | — | — | — | 6:52 | — |
mm | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | 1 | 1 |
Temp °C | 30 | 29 | 28 | 29 | 27 | 30 | 32 | 31 | 30 | 29 | 28 | 27 | 26 | 27 | 28 | 28 | 28 | 27 |
Feels °C | 33 | 32 | 32 | 33 | 30 | 33 | 36 | 34 | 33 | 33 | 31 | 30 | 28 | 31 | 31 | 31 | 31 | 30 |
Swell 1 Height (m) Direction Period (s) | SE 11 | SE 11 | SE 11 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | SE 10 | SSW 6 | S 3 | S 5 | SSE 10 | SSE 9 | S 6 | SSE 9 | SSW 7 | SE 11 | SE 11 |
| kJ | 5 | 5 | 5 | 19 | 20 | 13 | 13 | 4 | 7 | 2 | 4 | 9 | 9 | 3 | 8 | 5 | 18 | 18 |
Swell 2 Height (m) Direction Period (s) | S 8 | S 8 | S 7 | SE 11 | SE 10 | SSE 10 | SSE 10 | S 8 | SE 10 | SSW 5 | SSE 10 | S 5 | SSW 7 | SSE 9 | SE 18 | SSE 9 | SSW 7 | SE 16 |
| kJ | 1 | 1 | 1 | 4 | 4 | 10 | 10 | 1 | 4 | 3 | 9 | 2 | 5 | 8 | 12 | 8 | 5 | 10 |
Swell 3 Height (m) Direction Period (s) | SE 11 | SE 7 | SE 7 | S 20 | SE 20 | SE 19 | S 19 | S 19 | S 8 | SSE 10 | SE 18 | SE 18 | SE 18 | SE 18 | SE 11 | SE 17 | SE 16 | SW 7 |
| kJ | 5 | 2 | 2 | 7 | 15 | 15 | 7 | 7 | 1 | 10 | 12 | 12 | 12 | 12 | 5 | 11 | 11 | 2 |
Wind waves Height (m) Direction Period (s) | SSW 5 | SSW 5 | SSW 5 | SW 6 | — | — | — | SSW 6 | S 3 | — | — | — | — | — | SSW 6 | S 2 | SSE 3 | SSE 3 |
| kJ | 17 | 25 | 17 | 46 | — | — | — | 13 | 3 | — | — | — | — | — | 4 | 1 | 2 | 2 |
Nearest Offshore or Glassy | ||||||||||||||||||
Distance (km) | 798 | 92 | 76 | 0 | 38 | 16 | 16 | 51 | 51 | 51 | 51 | 51 | 51 | 74 | 249 | 18 | 64 | 38 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||
Header Global | ||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Rock Island surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Nearest