Surf Forecasts:
How big are the waves at Rock Island today (15 Jul):
- Morning surf: Morning surf (15 Jul, local time) - 1.5ft (0.4m), 9s period with SSW swell.
- Afternoon surf: Afternoon surf (15 Jul, local time) - 1ft (0.3m), 9s period with SSW swell.
- Evening surf: Evening surf (15 Jul, local time) - 2.5ft (0.7m), 9s period with S swell.
The current surf forecast for Rock Island at 3AM is: 0.4m 10s primary swell from a South-southwest direction and 0.1m 10s secondary swell from a Southeast direction, 0.2m 3s secondary swell from a South direction (forecast issued at 08:00pm July 14). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (15 Jul) | 1.5ft (0.4m) | 9s |
| Afternoon (15 Jul) | 1ft (0.3m) | 9s |
| Evening (15 Jul) | 2.5ft (0.7m) | 9s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 4mm), mostly falling on Thu night. Warm (max 30°C on Thu afternoon, min 26°C on Tue night). Wind will be generally light. | ||||||||||||||||||||||||
Tue 14 | Wednesday 15 | Thursday 16 | Friday 17 | |||||||||||||||||||||
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 | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | SW 9 | SSW 9 | SSW 9 | S 9 | SSW 4 | SSW 5 | SSW 5 | S 5 | S 5 | S 5 | SSW 5 | S 5 | SE 10 | S 4 | SSW 8 | SSW 8 | SSW 8 | SSW 8 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 57 | 39 | 38 | 38 | 36 | 34 | 22 | 16 | 16 | 79 | 17 | 33 | 33 | 18 | 13 | 13 | 8 | 11 | 16 | 6 | 6 | 6 | 6 | 6 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | cross-on | on | cross-on | cross-on | on | cross-on | on | on | cross-on | cross | off | cross | on | on | cross-on | cross-off | off | off | cross-off | cross | cross-on |
High Tide | 6:12PM1.43m | 4:01AM1.49m | 6:44PM1.45m | 4:50AM1.51m | 7:13PM1.45m | 5:38AM1.50m | ||||||||||||||||||
Low Tide | 10:59PM1.06m | 11:27AM-0.00m | 11:40PM1.01m | 12:06PM0.02m | 00:20AM0.94m | 12:43PM0.07m | ||||||||||||||||||
 |  | | |  | | | | |  | | | | | | | | |  | | | |  | | |
 | — | — | — | 4:37 | — | — | — | — | — | — | — | 4:37 | — | — | — | — | — | — | — | 4:39 | — | — | — | — |
 | 6:57 | — | — | — | — | — | — | — | 6:57 | — | — | — | — | — | — | — | 6:55 | — | — | — | — | — | — | 6:55 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | 1 | 1 |
Temp °C | 28 | 27 | 26 | 26 | 26 | 27 | 28 | 28 | 27 | 26 | 26 | 26 | 27 | 28 | 29 | 30 | 28 | 27 | 27 | 27 | 27 | 28 | 28 | 28 |
Feels °C | 28 | 27 | 27 | 29 | 30 | 31 | 31 | 30 | 28 | 27 | 28 | 30 | 31 | 32 | 33 | 33 | 31 | 31 | 32 | 30 | 30 | 32 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | SW 9 | SSW 9 | SSW 9 | SE 9 | SSW 9 | SSW 4 | S 5 | S 5 | S 5 | SSW 8 | SSW 8 | SSW 8 | SSW 8 | S 4 | S 4 | S 4 | SSW 8 | SSW 8 |
| kJ | 57 | 39 | 38 | 38 | 36 | 34 | 22 | 16 | 16 | 3 | 16 | 15 | 16 | 18 | 13 | 7 | 7 | 6 | 6 | 5 | 3 | 1 | 6 | 6 |
Swell 2 Height (m) Direction Period (s) | SE 12 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 11 | SE 9 | SSW 9 | SSW 9 | SSW 8 | SSW 8 | SE 10 | SE 10 | SE 10 | SE 10 | SSW 8 | SSW 8 | SSW 8 | SE 10 | SE 9 |
| kJ | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 5 | 3 | 8 | 7 | 7 | 7 | 4 | 4 | 4 | 4 | 6 | 6 | 6 | 4 | 3 |
Swell 3 Height (m) Direction Period (s) | — | S 15 | S 14 | S 14 | S 3 | S 3 | S 14 | SE 11 | SE 11 | S 13 | E 11 | SE 9 | SE 9 | SE 9 | SE 10 | SE 8 | SE 8 | SE 8 | SE 10 | SE 10 | SE 9 | SE 9 | E 9 | E 10 |
| kJ | — | 4 | 4 | 4 | 1 | 1 | 4 | 5 | 5 | 4 | 2 | 3 | 3 | 3 | 4 | 3 | 3 | 3 | 16 | 4 | 3 | 3 | 2 | 2 |
Wind waves Height (m) Direction Period (s) | S 3 | SSW 3 | SSW 3 | S 3 | — | — | S 3 | S 3 | S 3 | S 9 | SSW 4 | SSW 5 | SSW 5 | — | — | S 5 | SSW 5 | S 5 | SSW 4 | — | — | — | S 4 | S 3 |
| kJ | 3 | 3 | 2 | 1 | — | — | 1 | 1 | 5 | 79 | 17 | 33 | 33 | — | — | 13 | 8 | 11 | 5 | — | — | — | 3 | 5 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 76 | 76 | 38 | 76 | 76 | 18 | 77 | 77 | 77 | 77 | 77 | 2 | 2 | 16 | 16 | 77 | 18 | 76 | 54 | 16 | 51 | 16 | 64 | 64 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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