Surf Forecasts:
How big are the waves at Rock Island today (10 Jul):
- Afternoon surf: Afternoon surf (10 Jul, local time) - 6.5ft (2.0m), 16s period with S swell.
- Evening surf: Evening surf (10 Jul, local time) - 7ft (2.1m), 16s period with SSW swell.
The current surf forecast for Rock Island at 7PM is: 2.0m 16s primary swell from a South direction and 0.9m 20s secondary swell from a South-southwest direction (forecast issued at 02:00pm July 10). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (10 Jul) | - | - |
| Afternoon (10 Jul) | 6.5ft (2.0m) | 16s |
| Evening (10 Jul) | 7ft (2.1m) | 16s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 3mm), mostly falling on Sat night. Warm (max 27°C on Mon morning, min 24°C on Fri night). Winds decreasing (fresh winds from the S on Sat afternoon, calm by Sun night). | ||||||||||||||||||||||||
Fri 10 | Saturday 11 | Sunday 12 | Mon 13 | |||||||||||||||||||||
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 | 12 AM | 3 AM | 6 AM | 9 AM | |
Swell Height Map |  |  |  |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | S 17 | S 16 | S 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 13 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 2097 | 2141 | 2088 | 2107 | 2133 | 1455 | 2244 | 2368 | 2455 | 2296 | 1967 | 1896 | 1697 | 1531 | 1512 | 1512 | 1341 | 1169 | 953 | 656 | 487 | 384 | 269 | 209 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | on | on | on | on | on | on | on | cross-on | cross-on | cross-on | on | on | on | on | cross-on | glassy | off | off |
High Tide | 2:42PM1.15m | 00:30AM1.37m | 4:01PM1.24m | 1:22AM1.40m | 4:55PM1.32m | 2:17AM1.43m | ||||||||||||||||||
Low Tide | 6:45PM1.02m | 8:19AM0.28m | 8:06PM1.09m | 9:13AM0.17m | 9:17PM1.11m | |||||||||||||||||||
 | | |  | | | | |  |  | |  | |  | |  | | | | | | | | | |
 | — | — | — | — | — | 4:35 | — | — | — | — | — | — | — | 4:35 | — | — | — | — | — | — | — | 4:35 | — | — |
 | — | — | 6:59 | — | — | — | — | — | — | — | 6:58 | — | — | — | — | — | — | — | 6:58 | — | — | — | — | 6:58 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | 1 | 1 | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 25 | 25 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 26 | 25 | 25 | 25 | 26 |
Feels °C | 26 | 25 | 25 | 24 | 24 | 25 | 26 | 27 | 24 | 25 | 25 | 23 | 25 | 26 | 28 | 28 | 28 | 29 | 26 | 27 | 27 | 28 | 28 | 29 |
Swell 1 Height (m) Direction Period (s) | S 17 | S 16 | S 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SSW 7 |
| kJ | 2097 | 2141 | 2088 | 2107 | 2133 | 1455 | 2244 | 2368 | 2455 | 2296 | 1967 | 1896 | 1697 | 1531 | 1512 | 1512 | 1341 | 1169 | 953 | 656 | 487 | 384 | 269 | 62 |
Swell 2 Height (m) Direction Period (s) | — | — | SSW 20 | SE 10 | SE 10 | SSW 18 | — | — | — | — | — | — | — | — | SE 10 | SE 10 | SE 10 | SE 10 | SE 13 | SSE 10 | SSE 10 | S 5 | S 6 | SSW 13 |
| kJ | — | — | 634 | 76 | 82 | 616 | — | — | — | — | — | — | — | — | 25 | 35 | 34 | 32 | 7 | 9 | 9 | 15 | 22 | 209 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SE 14 | SE 14 | SE 13 | — | ESE 13 | ESE 13 | SE 10 | SE 10 | SE 10 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 | 7 | 7 | — | 17 | 17 | 4 | 4 | 4 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | S 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | — | — | — | — | SSW 4 | SSW 4 | SSW 5 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 18 | 22 | 25 | 25 | 14 | 10 | — | — | — | — | 8 | 13 | 39 | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 77 | 77 | 77 | 76 | 27 | 14 | 14 | 14 | 77 | 77 | 27 | 27 | 27 | 12 | 10 | 12 | 14 | 14 | 14 | 27 | 10 | 0 | 0 | 0 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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