Surf Forecasts:
How big are the waves at Rock Island today (07 Sep):
- Morning surf: Morning surf (07 Sep, local time) - 5.5ft (1.7m), 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 (1.9m), 9s period with S swell.
The current surf forecast for Rock Island at 5PM is: 3.0m 9s primary swell from a South direction and 2.1m 9s secondary swell from a South direction, 2.0m 9s secondary swell from a South-southwest direction (forecast issued at 08:00am September 07). The wind direction is predicted to be cross-offshore and the swell rating is 4.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (07 Sep) | 5.5ft (1.7m) | 9s |
| Afternoon (07 Sep) | 10ft (3.0m) | 9s |
| Evening (07 Sep) | 6ft (1.9m) | 9s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 81mm), heaviest during Mon morning. Warm (max 28°C on Tue afternoon, min 21°C on Wed night). Winds increasing (calm on Mon morning, fresh winds from the N by Wed night). | ||||||||||||||||||||||
Monday 7 | Tuesday 8 | Wednesday 9 | ||||||||||||||||||||
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) | SSE 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | SSW 10 | S 9 | SSE 9 | SSE 8 | S 8 | SSW 9 | SSW 9 | SSW 10 | S 9 | S 9 | S 9 | S 9 | S 9 |
Wave Graph  | ||||||||||||||||||||||
 kJ | 564 | 497 | 553 | 1597 | 1367 | 593 | 471 | 367 | 320 | 276 | 158 | 129 | 112 | 264 | 475 | 402 | 485 | 313 | 356 | 395 | 348 | 264 |
Wind (km/h) | ||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | glassy | cross-on | glassy | glassy | glassy | on | cross-on | glassy | on | on | on | on | on | on | on | on | on | cross-off | off | off |
High Tide | 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 | 42 | 27 | 17 | 8 | 3 | 3 | 2 | 1 | — | — | — | 1 | 2 | 1 | 1 | 1 | — | — | — | 1 | 1 | 1 |
Temp °C | 22 | 22 | 23 | 24 | 24 | 24 | 24 | 24 | 25 | 26 | 27 | 28 | 27 | 26 | 26 | 26 | 27 | 27 | 28 | 26 | 24 | 22 |
Feels °C | 21 | 24 | 27 | 27 | 28 | 28 | 28 | 27 | 29 | 30 | 30 | 29 | 29 | 29 | 28 | 28 | 29 | 29 | 29 | 27 | 24 | 21 |
Swell 1 Height (m) Direction Period (s) | SSE 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | S 9 | SSE 9 | SSW 9 | S 8 | SSW 10 | SSW 9 | SSW 9 | S 9 | E 12 | — | S 9 | S 9 |
| kJ | 564 | 497 | 553 | 670 | 723 | 593 | 471 | 367 | 320 | 276 | 158 | 129 | 92 | 137 | 193 | 216 | 259 | 313 | 3 | — | 348 | 264 |
Swell 2 Height (m) Direction Period (s) | SE 8 | — | — | SSW 9 | — | E 9 | SSW 9 | ESE 10 | SSW 9 | SSW 10 | SSW 10 | SSW 10 | ESE 10 | SSW 10 | SSE 8 | SSE 8 | SSE 8 | E 12 | ESE 10 | E 16 | E 16 | E 16 |
| kJ | 338 | — | — | 631 | — | 6 | 315 | 10 | 266 | 264 | 94 | 96 | 10 | 105 | 80 | 71 | 67 | 3 | 10 | 5 | 5 | 5 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | SSW 11 | ESE 10 | SE 10 | ESE 10 | SW 11 | E 10 | ESE 10 | ESE 10 | ESE 10 | E 12 | E 12 | ESE 10 | E 17 | — | — | E 16 |
| kJ | — | — | — | — | — | — | 24 | 10 | 17 | 10 | 19 | 2 | 10 | 10 | 10 | 3 | 3 | 10 | 6 | — | — | 5 |
Wind waves Height (m) Direction Period (s) | — | N 3 | — | S 9 | S 9 | — | — | — | — | — | — | — | SSE 8 | S 8 | SSW 9 | SSW 9 | SSW 10 | — | S 9 | S 9 | N 3 | NNE 4 |
| kJ | — | 3 | — | 1597 | 1367 | — | — | — | — | — | — | — | 112 | 264 | 475 | 402 | 485 | — | 356 | 395 | 1 | 12 |
Nearest Offshore or Glassy | ||||||||||||||||||||||
Distance (km) | 10 | 10 | 0 | 10 | 0 | 0 | 0 | 14 | 10 | 0 | 18 | 92 | 27 | 14 | 14 | 14 | 136 | 136 | 487 | 2 | 0 | 12 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||
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