Surf Forecasts:
How big are the waves at Rock Island today (13 Oct):
- Morning surf: Morning surf (13 Oct, local time) - 2.5ft (0.8m), 13s period with SE swell.
- Afternoon surf: Afternoon surf (13 Oct, local time) - 2.5ft (0.8m), 12s period with SE swell.
- Evening surf: Evening surf (13 Oct, local time) - 2ft (0.6m), 12s period with SE swell.
The current surf forecast for Rock Island at 6AM is: 0.9m 13s primary swell from a Southeast direction (forecast issued at 02:00am October 13). An open ocean swell of 0.7m 9s is not directed at the surf break, a second open ocean swell of 0.4m 3s is not directed at the surf break. The wind direction is predicted to be offshore and the swell rating is 2.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Oct) | 2.5ft (0.8m) | 13s |
| Afternoon (13 Oct) | 2.5ft (0.8m) | 12s |
| Evening (13 Oct) | 2ft (0.6m) | 12s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Warm (max 26°C on Wed afternoon, min 18°C on Wed night). Winds increasing (light winds from the E on Tue afternoon, strong winds from the NNE by Wed night). | ||||||||||||||||||||||||
Tuesday 13 | Wednesday 14 | Thursday 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) | SE 14 | SE 14 | SE 13 | SE 13 | SE 13 | SE 12 | SE 12 | SE 12 | SE 11 | ESE 11 | SE 10 | SE 10 | SSW 5 | SSW 5 | SW 5 | SE 9 | E 10 | ESE 8 | SE 8 | SE 8 | ESE 8 | ESE 8 | ESE 9 | SE 6 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 322 | 322 | 299 | 242 | 277 | 184 | 141 | 106 | 57 | 23 | 25 | 25 | 56 | 80 | 79 | 27 | 16 | 7 | 3 | 3 | 6 | 7 | 7 | 6 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | cross-off | on | on | on | on | on | on | cross-on | on | cross-on | off | off | cross-off | cross-off | cross-off | cross-off | cross | cross | cross-off |
High Tide | 6:22AM1.55m | 5:35PM1.53m | 7:07AM1.52m | 6:00PM1.54m | 7:54AM1.46m | 6:27PM1.53m | ||||||||||||||||||
Low Tide | 11:43PM0.24m | 12:00PM0.77m | 00:19AM0.18m | 12:31PM0.87m | 00:57AM0.15m | 1:03PM0.96m | ||||||||||||||||||
 | |  | | | | | | | | |  | | | |  | |  |  | | | | | | |
 | — | 5:45 | — | — | — | — | — | — | — | 5:46 | — | — | — | — | — | — | — | 5:47 | — | — | — | — | — | — |
 | — | — | — | — | — | 5:09 | — | — | — | — | — | — | — | 5:08 | — | — | — | — | — | — | — | 5:07 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 20 | 20 | 19 | 20 | 22 | 23 | 23 | 22 | 22 | 22 | 22 | 23 | 25 | 26 | 26 | 23 | 21 | 20 | 18 | 18 | 19 | 19 | 20 | 20 |
Feels °C | 17 | 17 | 16 | 18 | 21 | 24 | 24 | 22 | 21 | 21 | 19 | 20 | 21 | 23 | 26 | 16 | 15 | 15 | 15 | 15 | 17 | 18 | 19 | 20 |
Swell 1 Height (m) Direction Period (s) | SE 14 | SE 14 | SE 13 | SE 13 | SE 13 | SE 12 | SE 12 | SE 12 | SE 11 | SE 10 | SE 10 | SE 10 | SE 9 | ESE 9 | SSW 5 | SSW 5 | SSW 5 | ESE 8 | SE 8 | SE 8 | ESE 8 | ESE 8 | ESE 9 | SE 6 |
| kJ | 322 | 322 | 299 | 242 | 277 | 184 | 141 | 106 | 57 | 15 | 25 | 25 | 13 | 8 | 55 | 23 | 9 | 7 | 3 | 3 | 6 | 7 | 7 | 6 |
Swell 2 Height (m) Direction Period (s) | — | ENE 9 | ENE 9 | — | E 8 | E 8 | E 8 | E 8 | — | ESE 11 | — | SE 9 | E 10 | E 10 | ESE 9 | ESE 9 | ESE 8 | S 4 | — | — | — | S 5 | — | — |
| kJ | — | 82 | 82 | — | 34 | 33 | 21 | 18 | — | 23 | — | 3 | 2 | 7 | 8 | 7 | 7 | 2 | — | — | — | 1 | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | SE 9 | E 10 | SSW 6 | SW 6 | — | S 5 | E 12 | SW 5 | E 11 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 27 | 16 | 4 | 2 | — | 1 | 3 | 1 | 2 |
Wind waves Height (m) Direction Period (s) | NNE 3 | NNE 3 | NNE 3 | NNE 3 | — | — | — | — | — | — | SW 3 | SW 4 | SSW 5 | SSW 5 | SW 5 | N 2 | NE 3 | NE 3 | NE 3 | NE 3 | ENE 3 | — | — | — |
| kJ | 4 | 3 | 3 | 2 | — | — | — | — | — | — | 2 | 13 | 56 | 80 | 79 | 1 | 3 | 3 | 6 | 3 | 1 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 7 | 2 | 0 | 0 | 0 | 0 | 14 | 14 | 38 | 38 | 38 | 228 | 142 | 505 | 10 | 54 | 142 | 514 | 145 | 145 | 142 | 54 | 38 | 38 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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