Surf Forecasts:
How big are the waves at Rock Island today (09 Aug):
- Morning surf: Morning surf (09 Aug, local time) - 2.5ft (0.7m), 10s period with SSW swell.
- Afternoon surf: Afternoon surf (09 Aug, local time) - 2.5ft (0.7m), 10s period with SSW swell.
- Evening surf: Evening surf (09 Aug, local time) - 2ft (0.6m), 11s period with SSW swell.
The current surf forecast for Rock Island at 5PM is: 0.6m 11s primary swell from a South-southwest direction and 0.3m 13s secondary swell from a East-southeast direction, 0.3m 2s secondary swell from a South direction (forecast issued at 08:00am August 09). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (09 Aug) | 2.5ft (0.7m) | 10s |
| Afternoon (09 Aug) | 2.5ft (0.7m) | 10s |
| Evening (09 Aug) | 2ft (0.6m) | 11s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 27mm), heaviest during Tue night. Warm (max 29°C on Sun afternoon, min 23°C on Mon night). Mainly fresh winds. | ||||||||||||||||||||||
Sunday 9 | Monday 10 | Tuesday 11 | ||||||||||||||||||||
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 11 | SSW 10 | SSW 10 | SSW 10 | SSW 11 | SSW 11 | SSW 11 | S 10 | S 10 | S 11 | S 11 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 11 | SSW 11 | SSW 10 | SSW 10 |
Wave Graph  | ||||||||||||||||||||||
 kJ | 114 | 112 | 112 | 115 | 88 | 88 | 88 | 80 | 75 | 62 | 59 | 93 | 64 | 59 | 59 | 58 | 59 | 62 | 64 | 64 | 62 | 59 |
Wind (km/h) | ||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | glassy | on | cross-on | cross | cross-off | off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | glassy | on | on | on | cross-on |
High Tide | 4:09PM1.28m | 00:45AM1.38m | 4:47PM1.36m | 2:03AM1.40m | 5:17PM1.41m | |||||||||||||||||
Low Tide | 7:52AM0.33m | 7:53PM1.19m | 8:54AM0.25m | 9:16PM1.16m | 9:46AM0.18m | |||||||||||||||||
 | | |  |  |  |  |  | | | | | | | | | | | | | |  | |
 | 4:54 | — | — | — | — | — | — | 4:56 | — | — | — | — | — | — | — | 4:56 | — | — | — | — | — | — |
 | — | — | — | — | 6:37 | — | — | — | — | — | — | — | 6:37 | — | — | — | — | — | — | — | 6:36 | — |
mm | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 10 |
Temp °C | 26 | 26 | 28 | 29 | 28 | 27 | 26 | 26 | 25 | 26 | 28 | 29 | 28 | 25 | 24 | 23 | 24 | 25 | 24 | 25 | 25 | 23 |
Feels °C | 30 | 30 | 31 | 31 | 29 | 29 | 27 | 26 | 25 | 26 | 28 | 30 | 28 | 24 | 24 | 23 | 24 | 27 | 23 | 23 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | S 11 | SSW 10 | SSW 10 | SSW 10 | SSW 11 | SSW 11 | SSW 11 | S 10 | S 10 | S 11 | S 11 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 11 | SSW 11 | SSW 10 | SSW 10 |
| kJ | 114 | 112 | 112 | 115 | 88 | 88 | 88 | 80 | 75 | 62 | 59 | 93 | 64 | 59 | 59 | 58 | 59 | 62 | 64 | 64 | 62 | 59 |
Swell 2 Height (m) Direction Period (s) | SW 10 | ESE 13 | ESE 13 | ESE 13 | ESE 13 | ESE 13 | SW 12 | SW 12 | SW 11 | SW 12 | SW 11 | ESE 12 | ESE 11 | ESE 11 | E 11 | E 11 | SE 13 | SE 12 | SE 12 | SE 12 | SE 12 | SE 13 |
| kJ | 27 | 34 | 34 | 34 | 33 | 16 | 23 | 23 | 20 | 21 | 20 | 13 | 12 | 12 | 9 | 2 | 6 | 6 | 6 | 6 | 6 | 6 |
Swell 3 Height (m) Direction Period (s) | ESE 13 | SE 12 | SE 12 | SE 12 | SE 15 | SW 12 | ESE 12 | ESE 12 | ESE 12 | ESE 12 | ESE 12 | SE 11 | SW 11 | SW 11 | SE 11 | SE 13 | E 10 | E 10 | E 11 | E 11 | E 11 | SE 10 |
| kJ | 34 | 5 | 5 | 5 | 9 | 24 | 15 | 14 | 14 | 14 | 14 | 5 | 5 | 5 | 5 | 7 | 2 | 2 | 2 | 2 | 2 | 4 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | S 2 | S 3 | — | — | — | — | — | — | — | — | — | ENE 2 | — | — | — | SSW 3 | SSW 3 | SSW 3 |
| kJ | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | 1 | — | — | — | 3 | 9 | 4 |
Nearest Offshore or Glassy | ||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 18 | 51 | 12 | 0 | 0 | 0 | 0 | 12 | 0 | 27 | 38 | 17 | 17 | 7 | 0 | 76 | 509 | 122 | 27 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||
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