Surf Forecasts:
How big are the waves at Rock Island today (13 Jul):
- Morning surf: Morning surf (13 Jul, local time) - 3.5ft (1.0m), 13s period with SSW swell.
- Afternoon surf: Afternoon surf (13 Jul, local time) - 3ft (0.9m), 12s period with SSW swell.
- Evening surf: Evening surf (13 Jul, local time) - 2.5ft (0.8m), 11s period with SSW swell.
The current surf forecast for Rock Island at 8AM is: 1.0m 13s primary swell from a South-southwest direction and 0.1m 10s secondary swell from a Southeast direction (forecast issued at 02:00am July 13). The wind direction is predicted to be glassy and the swell rating is 2.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Jul) | 3.5ft (1.0m) | 13s |
| Afternoon (13 Jul) | 3ft (0.9m) | 12s |
| Evening (13 Jul) | 2.5ft (0.8m) | 11s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 27°C on Mon morning, min 25°C on Mon night). Winds increasing (calm on Mon night, fresh winds from the S by Wed afternoon). | ||||||||||||||||||||||||
Monday 13 | Tuesday 14 | Wednesday 15 | ||||||||||||||||||||||
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 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | S 9 | S 4 | SSW 4 | SSW 4 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 569 | 379 | 321 | 302 | 210 | 206 | 158 | 145 | 109 | 95 | 93 | 66 | 64 | 59 | 39 | 39 | 38 | 38 | 36 | 34 | 61 | 18 | 28 | 24 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | glassy | glassy | cross-on | cross-on | cross | glassy | glassy | glassy | cross-on | on | on | on | on | on | on | on | on | on | on | cross-on | cross-on | on |
High Tide | 2:17AM1.43m | 5:37PM1.38m | 3:10AM1.46m | 6:12PM1.43m | 4:01AM1.49m | 6:44PM1.45m | ||||||||||||||||||
Low Tide | 9:17PM1.11m | 10:01AM0.08m | 10:13PM1.10m | 10:45AM0.02m | 10:59PM1.06m | 11:27AM-0.00m | ||||||||||||||||||
 | |  | | | | |  | |  |  |  | | | | | | | | | | | | | |
 | — | 4:35 | — | — | — | — | — | — | — | 4:37 | — | — | — | — | — | — | — | 4:37 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 6:58 | — | — | — | — | — | — | — | 6:57 | — | — | — | — | — | — | — | 6:57 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 26 | 25 | 26 | 27 | 27 | 27 | 26 | 26 | 25 | 25 | 26 | 27 | 27 | 27 | 26 |
Feels °C | 29 | 30 | 31 | 30 | 30 | 30 | 30 | 31 | 31 | 29 | 28 | 28 | 29 | 28 | 27 | 26 | 28 | 27 | 28 | 28 | 28 | 27 | 27 | 26 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | SSW 9 | SE 9 | SE 9 | SE 9 | SE 9 |
| kJ | 569 | 379 | 321 | 302 | 210 | 206 | 158 | 145 | 109 | 95 | 93 | 66 | 64 | 59 | 39 | 39 | 38 | 38 | 36 | 34 | 3 | 3 | 3 | 3 |
Swell 2 Height (m) Direction Period (s) | SSE 10 | S 5 | SE 10 | SE 10 | SSE 10 | SE 10 | SE 10 | SE 9 | SE 9 | SE 9 | SE 9 | SE 9 | SE 12 | SE 12 | SE 12 | SE 10 | SE 10 | SE 10 | SE 10 | SE 10 | SE 11 | SE 11 | SE 11 | S 13 |
| kJ | 9 | 8 | 4 | 4 | 9 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 6 | 6 | 5 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 3 |
Swell 3 Height (m) Direction Period (s) | SE 10 | SE 10 | SE 13 | SE 13 | ESE 13 | ESE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 12 | SE 9 | S 15 | — | S 15 | S 14 | S 14 | — | — | S 14 | S 13 | S 13 | E 11 |
| kJ | 23 | 4 | 7 | 7 | 16 | 15 | 6 | 6 | 6 | 6 | 6 | 6 | 3 | 4 | — | 4 | 4 | 4 | — | — | 4 | 4 | 4 | 3 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | S 3 | S 3 | S 4 | SSW 3 | SSW 3 | SSW 3 | SSW 3 | S 9 | S 4 | SSW 4 | SSW 4 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 8 | 6 | 3 | 2 | 2 | 2 | 61 | 18 | 28 | 24 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 10 | 4 | 0 | 0 | 14 | 18 | 2 | 0 | 0 | 0 | 38 | 18 | 77 | 77 | 77 | 38 | 76 | 38 | 76 | 77 | 77 | 77 | 77 | 77 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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