Surf Forecasts:
How big are the waves at Rock Island today (19 Sep):
- Morning surf: Morning surf (19 Sep, local time) - 6ft (1.8m), 16s period with SE swell.
- Afternoon surf: Afternoon surf (19 Sep, local time) - 6ft (1.9m), 14s period with SE swell.
- Evening surf: Evening surf (19 Sep, local time) - 6ft (1.8m), 13s period with SE swell.
The current surf forecast for Rock Island at 8AM is: 1.7m 16s primary swell from a Southeast direction and 1.7m 13s secondary swell from a Southeast direction (forecast issued at 02:00am September 19). An open ocean swell of 0.6m 4s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (19 Sep) | 6ft (1.8m) | 16s |
| Afternoon (19 Sep) | 6ft (1.9m) | 14s |
| Evening (19 Sep) | 6ft (1.8m) | 13s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 145mm), heaviest during Mon night. Warm (max 26°C on Sat afternoon, min 21°C on Sun afternoon). Mainly gales. | ||||||||||||||||||||||||
Saturday 19 | Sunday 20 | Monday 21 | ||||||||||||||||||||||
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) | SE 14 | SE 14 | SE 16 | SE 16 | SE 15 | SE 14 | SE 13 | SE 13 | SE 13 | SSE 13 | SSE 12 | SSE 12 | SSE 12 | SSE 12 | SSE 11 | SSE 12 | SSE 12 | SSE 12 | SSE 12 | S 13 | S 13 | S 13 | SSE 13 | SSE 13 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 164 | 368 | 1158 | 1551 | 1542 | 1368 | 1218 | 1110 | 1077 | 953 | 908 | 746 | 680 | 646 | 613 | 736 | 887 | 1220 | 1510 | 2088 | 2287 | 2323 | 3042 | 3454 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | cross-off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | cross-off |
High Tide | 11:24AM1.23m | 8:42PM1.41m | 1:35PM1.24m | 9:38PM1.34m | 2:52PM1.30m | |||||||||||||||||||
Low Tide | 3:44AM0.37m | 3:06PM1.13m | 4:55AM0.41m | 4:31PM1.21m | 6:20AM0.44m | 7:16PM1.19m | ||||||||||||||||||
 | |  |  | | |  | | |  |  | | |  | |  |  | | | | |  | | | |
 | — | 5:26 | — | — | — | — | — | — | — | 5:26 | — | — | — | — | — | — | — | 5:28 | — | — | — | — | — | — |
 | — | — | — | — | — | 5:44 | — | — | — | — | — | — | — | 5:43 | — | — | — | — | — | — | — | 5:40 | — | — |
mm | — | — | — | — | — | — | — | — | — | 2 | 1 | — | 4 | 7 | 5 | 6 | 12 | 5 | 4 | 5 | 4 | 13 | 32 | 39 |
Temp °C | 21 | 21 | 21 | 22 | 24 | 26 | 24 | 23 | 23 | 22 | 23 | 23 | 22 | 21 | 21 | 21 | 21 | 21 | 22 | 22 | 23 | 23 | 23 | 23 |
Feels °C | 16 | 17 | 17 | 19 | 22 | 25 | 23 | 23 | 23 | 22 | 23 | 21 | 19 | 18 | 17 | 17 | 17 | 17 | 19 | 18 | 18 | 17 | 14 | 15 |
Swell 1 Height (m) Direction Period (s) | SE 14 | SE 14 | SE 16 | SE 16 | SE 15 | SE 14 | SE 13 | SE 13 | SE 13 | SSE 13 | SSE 12 | SSE 12 | SSE 12 | SSE 12 | SSE 11 | SSE 12 | SSE 12 | SSE 12 | SSE 12 | S 13 | S 13 | S 13 | SSE 13 | SSE 13 |
| kJ | 164 | 368 | 1158 | 1551 | 1542 | 1368 | 1218 | 1110 | 1077 | 953 | 908 | 746 | 680 | 646 | 613 | 689 | 887 | 1220 | 1510 | 2088 | 2287 | 2323 | 3042 | 3454 |
Swell 2 Height (m) Direction Period (s) | E 8 | S 10 | SE 13 | — | — | NE 9 | — | — | — | — | — | — | E 14 | S 15 | S 15 | S 12 | — | E 12 | — | — | — | — | — | — |
| kJ | 13 | 2 | 940 | — | — | 23 | — | — | — | — | — | — | 4 | 106 | 107 | 736 | — | 11 | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | E 9 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NNE 4 | NNE 4 | NNE 4 | NNE 4 | NNE 4 | — | — | — | NE 3 | NE 3 | — | NE 3 | NNE 3 | NNE 3 | NNE 3 | NNE 4 | NNE 4 | NNE 4 | NNE 4 | N 4 | NNE 4 | N 4 | N 4 | N 4 |
| kJ | 14 | 14 | 11 | 11 | 28 | — | — | — | 7 | 2 | — | 3 | 4 | 6 | 9 | 16 | 14 | 19 | 15 | 18 | 24 | 34 | 53 | 58 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 470 | 228 | 145 | 487 | 755 | 38 | 38 | 8 | 4 | 0 | 0 | 552 | 552 | 552 | 552 | 552 | 509 | 509 | 51 | 51 | 509 | 509 | 136 | 90 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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