Surf Forecasts:
How big are the waves at Rock Island today (30 Jul):
- Morning surf: Morning surf (30 Jul, local time) - 1.5ft (0.4m), 7s period with SSW swell.
- Afternoon surf: Afternoon surf (30 Jul, local time) - 1ft (0.3m), 7s period with SSW swell.
- Evening surf: Evening surf (30 Jul, local time) - 1.5ft (0.4m), 7s period with SSW swell.
The current surf forecast for Rock Island at 6AM is: 0.4m 7s primary swell from a South-southwest direction and 0.1m 10s secondary swell from a Southeast direction (forecast issued at 02:00am July 30). The wind direction is predicted to be cross-offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (30 Jul) | 1.5ft (0.4m) | 7s |
| Afternoon (30 Jul) | 1ft (0.3m) | 7s |
| Evening (30 Jul) | 1.5ft (0.4m) | 7s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 2mm), mostly falling on Thu afternoon. Warm (max 30°C on Fri morning, min 27°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 30 | Friday 31 | Saturday 1 | ||||||||||||||||||||||
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 | 6 PM | 9 PM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | S 7 | SSW 7 | SSW 7 | S 6 | S 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 7 | SSW 7 | SSW 6 | SSW 6 | ESE 16 | ESE 16 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 28 | 26 | 17 | 18 | 17 | 10 | 38 | 16 | 23 | 26 | 35 | 22 | 21 | 14 | 14 | 14 | 13 | 7 | 4 | 9 | 7 | 12 | 25 | 25 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | glassy | cross-off | cross-off | cross-on | on | cross-on | glassy | glassy | off | off | off | cross-on | cross-on | on | cross-on | cross | glassy | off | glassy | cross-on | on | on | cross-on |
High Tide | 4:28AM1.51m | 6:41PM1.46m | 5:16AM1.53m | 7:07PM1.47m | 6:03AM1.53m | 7:32PM1.46m | ||||||||||||||||||
Low Tide | 11:15PM1.00m | 11:39AM0.07m | 11:52PM0.91m | 12:16PM0.11m | 00:29AM0.82m | 12:51PM0.19m | ||||||||||||||||||
 | |  |  | | |  |  |  | | | | | | | | | | | | | |  | | |
 | — | 4:48 | — | — | — | — | — | — | — | 4:48 | — | — | — | — | — | — | — | 4:48 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 6:46 | — | — | — | — | — | — | — | 6:45 | — | — | — | — | — | — | — | 6:45 | — |
mm | — | — | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 29 | 28 | 27 | 28 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 29 | 30 | 30 | 29 | 28 | 27 | 27 | 28 | 28 | 29 | 30 | 29 | 29 |
Feels °C | 31 | 32 | 30 | 31 | 31 | 31 | 32 | 33 | 32 | 31 | 30 | 31 | 33 | 32 | 31 | 31 | 31 | 31 | 32 | 32 | 32 | 32 | 32 | 33 |
Swell 1 Height (m) Direction Period (s) | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | SSW 7 | S 7 | SSW 7 | SSW 7 | S 6 | S 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | SSW 6 | S 6 | SSW 7 | SSW 6 | S 7 | SSW 6 | S 6 |
| kJ | 28 | 26 | 17 | 18 | 17 | 10 | 17 | 16 | 23 | 26 | 35 | 22 | 21 | 14 | 14 | 14 | 13 | 7 | 2 | 9 | 7 | 1 | 7 | 5 |
Swell 2 Height (m) Direction Period (s) | SE 9 | SE 9 | SE 10 | SE 10 | SE 9 | SE 10 | SE 10 | SE 9 | SE 10 | SE 9 | SE 9 | SE 9 | SE 9 | SE 10 | S 8 | SE 10 | SE 10 | SE 10 | SSW 7 | SE 10 | SE 8 | SE 15 | ESE 16 | ESE 16 |
| kJ | 3 | 3 | 4 | 4 | 3 | 4 | 4 | 3 | 4 | 3 | 3 | 3 | 3 | 4 | 1 | 4 | 4 | 4 | 4 | 4 | 3 | 8 | 25 | 25 |
Swell 3 Height (m) Direction Period (s) | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | S 8 | S 8 | SE 12 | SE 12 | SE 12 | SE 11 | S 8 | SE 9 | S 8 | S 8 | S 8 | SE 10 | SE 15 | SE 11 | SE 18 | SE 10 | SE 10 |
| kJ | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 1 | 1 | 6 | 6 | 6 | 5 | 1 | 3 | 1 | 1 | 1 | 4 | 9 | 4 | 12 | 4 | 4 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | SSW 7 | — | — | — | — | — | — | — | S 3 | — | — | — | — | — | — | SSW 6 | S 3 | — |
| kJ | — | — | — | — | — | — | 38 | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | 11 | 1 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 54 | 55 | 54 | 54 | 77 | 76 | 17 | 38 | 16 | 51 | 16 | 16 | 16 | 77 | 77 | 54 | 54 | 74 | 74 | 55 | 51 | 77 | 18 | 38 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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