Surf Forecasts:
How big are the waves at Rock Island today (07 Sep):
- Morning surf: Morning surf (07 Sep, local time) - 7ft (2.1m), 9s period with S swell.
- Afternoon surf: Afternoon surf (07 Sep, local time) - 10ft (3.0m), 9s period with S swell.
- Evening surf: Evening surf (07 Sep, local time) - 6ft (1.8m), 9s period with S swell.
The current surf forecast for Rock Island at 5AM is: 2.0m 9s primary swell from a South direction and 1.6m 8s secondary swell from a Southeast direction (forecast issued at 02:00am September 07). The wind direction is predicted to be cross-onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (07 Sep) | 7ft (2.1m) | 9s |
| Afternoon (07 Sep) | 10ft (3.0m) | 9s |
| Evening (07 Sep) | 6ft (1.8m) | 9s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 65mm), heaviest during Mon morning. Warm (max 28°C on Wed morning, min 21°C on Wed night). Winds increasing (calm on Tue morning, fresh winds from the N by Wed night). | ||||||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | ||||||||||||||||||||||
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) | S 9 | SSE 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | SSE 9 | S 9 | S 9 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | S 9 | S 9 | S 9 | S 9 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 104 | 525 | 690 | 739 | 1320 | 1288 | 651 | 533 | 476 | 367 | 320 | 320 | 199 | 276 | 328 | 332 | 506 | 574 | 586 | 351 | 465 | 621 | 521 | 422 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross-on | glassy | cross-on | on | on | on | cross-on | cross-on | on | cross-on | glassy | off | on | off | glassy | on | on | on | on | on | on | cross-off | off |
High Tide | 10:39PM1.34m | 3:40PM1.32m | 00:30AM1.32m | 4:09PM1.37m | 2:05AM1.36m | 4:34PM1.41m | ||||||||||||||||||
Low Tide | 7:20AM0.40m | 8:06PM1.18m | 8:30AM0.36m | 9:11PM1.08m | 9:25AM0.32m | |||||||||||||||||||
 |  |  | |  |  |  | |  |  |  |  | | | | | | | | | | |  | | |
 | — | 5:16 | — | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — | — | 5:18 | — | — | — | — | — | — |
 | — | — | — | — | — | — | 6:00 | — | — | — | — | — | — | — | 6:00 | — | — | — | — | — | — | 5:58 | — | — |
mm | 54 | 103 | 49 | 20 | 3 | 3 | 2 | 1 | 3 | 1 | — | — | — | 4 | 5 | 1 | 1 | 1 | 1 | — | 1 | 2 | 7 | 4 |
Temp °C | 23 | 24 | 23 | 24 | 25 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 27 | 25 | 25 | 25 | 26 | 26 | 27 | 28 | 27 | 23 | 21 |
Feels °C | 21 | 27 | 27 | 26 | 26 | 28 | 28 | 29 | 28 | 28 | 30 | 31 | 29 | 31 | 29 | 29 | 28 | 28 | 27 | 29 | 30 | 29 | 23 | 18 |
Swell 1 Height (m) Direction Period (s) | SE 8 | NNE 4 | SE 8 | — | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 8 | SSW 9 | SSW 10 | SSW 10 | SSE 8 | ESE 10 | E 12 | S 9 | S 9 |
| kJ | 99 | 1 | 355 | — | 842 | 788 | 651 | 533 | 476 | 367 | 320 | 320 | 199 | 165 | 185 | 140 | 185 | 245 | 301 | 94 | 10 | 3 | 521 | 422 |
Swell 2 Height (m) Direction Period (s) | S 9 | — | — | — | — | — | — | E 9 | ESE 10 | ESE 10 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 9 | SSW 10 | SSE 8 | SSE 8 | SSE 8 | E 12 | E 17 | E 16 | E 16 | E 16 |
| kJ | 104 | — | — | — | — | — | — | 13 | 10 | 10 | 237 | 197 | 66 | 90 | 69 | 107 | 76 | 82 | 86 | 3 | 6 | 5 | 5 | 5 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | SE 10 | ESE 10 | ESE 10 | ESE 10 | ESE 10 | SE 10 | ESE 10 | SE 12 | SE 12 | SE 12 | E 12 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 27 | 10 | 10 | 10 | 10 | 4 | 10 | 6 | 6 | 6 | 3 | — | — | — |
Wind waves Height (m) Direction Period (s) | NE 4 | SSE 9 | S 9 | S 9 | S 9 | S 9 | — | — | — | — | — | — | — | SSE 9 | S 9 | S 9 | SSW 10 | SSW 10 | SSW 10 | SSW 10 | S 9 | S 9 | N 3 | NNE 3 |
| kJ | 17 | 525 | 690 | 739 | 1320 | 1288 | — | — | — | — | — | — | — | 276 | 328 | 332 | 506 | 574 | 586 | 351 | 465 | 621 | 4 | 7 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 488 | 12 | 0 | 10 | 14 | 14 | 14 | 12 | 12 | 14 | 10 | 0 | 0 | 14 | 0 | 0 | 14 | 14 | 136 | 488 | 487 | 14 | 2 | 38 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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