Surf Forecasts:
How big are the waves at Rock Island today (26 Aug):
- Afternoon surf: Afternoon surf (26 Aug, local time) - 2.5ft (0.7m), 12s period with SSW swell.
- Evening surf: Evening surf (26 Aug, local time) - 2ft (0.6m), 11s period with SSW swell.
The current surf forecast for Rock Island at 8PM is: 0.6m 11s primary swell from a South-southwest direction and 0.4m 9s secondary swell from a South-southeast direction, 0.9m 5s secondary swell from a South-southwest direction (forecast issued at 02:00pm August 26). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (26 Aug) | - | - |
| Afternoon (26 Aug) | 2.5ft (0.7m) | 12s |
| Evening (26 Aug) | 2ft (0.6m) | 11s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 13mm), heaviest on Thu night. Warm (max 31°C on Wed afternoon, min 24°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||
Wed 26 | Thursday 27 | Friday 28 | ||||||||||||||||||
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) | SSW 11 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | S 12 | SSW 5 | SSW 6 | SSW 6 | S 11 | S 10 | S 10 | S 10 | S 9 | S 9 | SSW 6 | S 6 | SW 6 | SSW 8 | SSW 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 167 | 137 | 130 | 95 | 68 | 45 | 44 | 36 | 43 | 55 | 49 | 47 | 45 | 63 | 25 | 61 | 20 | 54 | 51 | 51 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | cross-on | on | on | glassy | off | off | cross-on | on | on | cross-off | glassy | glassy | glassy | glassy | glassy |
High Tide | 5:10PM1.43m | 3:40AM1.47m | 5:33PM1.46m | 4:32AM1.53m | 5:56PM1.47m | |||||||||||||||
Low Tide | 10:00AM0.23m | 10:21PM0.97m | 10:42AM0.22m | 10:57PM0.85m | 11:20AM0.24m | |||||||||||||||
 | | |  |  | |  |  | | |  |  |  |  | |  | | | | | |
 | — | — | — | — | — | 5:09 | — | — | — | — | — | — | — | 5:09 | — | — | — | — | — | — |
 | — | — | 6:17 | — | — | — | — | — | — | — | 6:15 | — | — | — | — | — | — | — | 6:15 | — |
mm | — | — | — | — | — | — | — | 1 | 1 | 1 | 1 | — | 1 | 6 | 2 | — | — | — | — | — |
Temp °C | 29 | 31 | 30 | 28 | 28 | 28 | 28 | 28 | 28 | 26 | 25 | 25 | 25 | 25 | 24 | 25 | 26 | 27 | 27 | 27 |
Feels °C | 32 | 33 | 31 | 29 | 29 | 31 | 32 | 32 | 33 | 24 | 26 | 25 | 25 | 27 | 26 | 29 | 30 | 32 | 31 | 31 |
Swell 1 Height (m) Direction Period (s) | SSW 11 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 5 | S 6 | S 6 | S 11 | SSW 6 | S 10 | S 10 | S 9 | SSW 6 | S 6 | S 6 | SSW 8 | SSE 9 | SSW 8 |
| kJ | 167 | 137 | 130 | 95 | 68 | 45 | 30 | 24 | 26 | 55 | 17 | 47 | 45 | 63 | 17 | 19 | 20 | 53 | 8 | 51 |
Swell 2 Height (m) Direction Period (s) | SSE 9 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | SSE 9 | SSW 10 | SSE 9 | S 11 | SE 10 | S 10 | S 6 | SSW 6 | SSE 9 | S 9 | S 9 | S 9 | SSE 10 | SW 9 | SSE 9 |
| kJ | 48 | 49 | 33 | 32 | 31 | 30 | 40 | 28 | 37 | 24 | 49 | 16 | 10 | 17 | 25 | 14 | 14 | 9 | 3 | 9 |
Swell 3 Height (m) Direction Period (s) | E 12 | E 12 | E 11 | E 11 | S 10 | S 12 | SSE 9 | SW 10 | SW 10 | SW 10 | SSE 10 | SE 10 | SSE 10 | SW 9 | SSE 9 | SSE 9 | SSE 9 | SW 9 | SE 14 | SW 9 |
| kJ | 3 | 3 | 3 | 3 | 19 | 43 | 32 | 25 | 26 | 15 | 18 | 23 | 9 | 3 | 17 | 8 | 8 | 3 | 8 | 3 |
Wind waves Height (m) Direction Period (s) | SSW 5 | SSW 4 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SSW 6 | SSW 6 | SSW 6 | SW 6 | — | — | SW 6 | — | SSW 6 | — | SW 6 | SSW 8 | SW 4 |
| kJ | 7 | 28 | 51 | 48 | 39 | 40 | 44 | 36 | 43 | 28 | 32 | — | — | 32 | — | 61 | — | 54 | 51 | 24 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 77 | 27 | 27 | 27 | 27 | 12 | 14 | 14 | 0 | 38 | 0 | 18 | 38 | 14 | 0 | 0 | 18 | 0 | 0 | 0 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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