Surf Forecasts:
How big are the waves at Rock Island today (18 Jun):
- Morning surf: Morning surf (18 Jun, local time) - 2.5ft (0.7m), 6s period with S swell.
- Afternoon surf: Afternoon surf (18 Jun, local time) - 2.5ft (0.8m), 7s period with S swell.
- Evening surf: Evening surf (18 Jun, local time) - 2.5ft (0.8m), 7s period with S swell.
The current surf forecast for Rock Island at 12PM is: 0.8m 7s primary swell from a South direction and 0.2m 8s secondary swell from a South-southeast direction (forecast issued at 08:00am June 18). An open ocean swell of 0.5m 3s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Jun) | 2.5ft (0.7m) | 6s |
| Afternoon (18 Jun) | 2.5ft (0.8m) | 7s |
| Evening (18 Jun) | 2.5ft (0.8m) | 7s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastHeavy rain (total 41mm), heaviest during Sat afternoon. Warm (max 24°C on Thu afternoon, min 20°C on Thu morning). Winds increasing (calm on Thu night, fresh winds from the N by Sat night). | ||||||||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sun 21 | |||||||||||||||||||||
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 | 12 AM | 3 AM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | S 6 | S 6 | S 7 | S 7 | S 7 | S 7 | S 7 | S 7 | S 6 | SSW 7 | SE 6 | S 6 | S 6 | SSE 6 | SE 5 | SSE 10 | SSW 8 | ESE 4 | SE 4 | SE 5 | SSE 10 | SSE 5 | SSE 5 | S 5 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 40 | 41 | 60 | 61 | 61 | 60 | 45 | 33 | 31 | 20 | 18 | 18 | 18 | 10 | 13 | 9 | 11 | 12 | 16 | 21 | 9 | 14 | 17 | 8 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | on | cross-on | glassy | off | off | cross-off | cross-on | on | cross-on | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | cross-off | cross-off | off | cross-off |
High Tide | 5:34AM1.46m | 8:16PM1.39m | 6:20AM1.42m | 8:53PM1.37m | 7:09AM1.36m | 9:28PM1.35m | ||||||||||||||||||
Low Tide | 12:57PM-0.03m | 1:14AM0.98m | 1:38PM0.05m | 2:01AM0.93m | 2:19PM0.17m | 2:54AM0.87m | ||||||||||||||||||
 |  |  |  | |  |  |  | | | | | | |  | | | | | | |  | | | |
 | 4:26 | — | — | — | — | — | — | 4:26 | — | — | — | — | — | — | — | 4:26 | — | — | — | — | — | — | — | 4:26 |
 | — | — | — | — | 6:58 | — | — | — | — | — | — | — | 6:59 | — | — | — | — | — | — | — | 6:59 | — | — | 6:59 |
mm | 7 | 5 | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | 1 | 2 | 1 | 5 | 8 | 8 | 8 | 2 |
Temp °C | 20 | 20 | 22 | 24 | 24 | 22 | 22 | 21 | 21 | 22 | 23 | 24 | 23 | 22 | 21 | 21 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 |
Feels °C | 19 | 18 | 20 | 23 | 26 | 23 | 25 | 23 | 22 | 24 | 24 | 25 | 23 | 23 | 21 | 20 | 19 | 20 | 22 | 23 | 21 | 22 | 22 | 20 |
Swell 1 Height (m) Direction Period (s) | S 6 | S 6 | S 7 | S 7 | S 7 | S 7 | S 7 | S 7 | S 6 | SSE 6 | SSE 6 | SSE 10 | SSE 10 | SSE 6 | SSE 5 | SSW 7 | SSW 8 | SSW 7 | SE 4 | SE 5 | SSE 10 | SSE 10 | SSE 9 | S 5 |
| kJ | 40 | 41 | 60 | 61 | 61 | 60 | 45 | 33 | 31 | 13 | 13 | 10 | 10 | 10 | 6 | 5 | 11 | 10 | 3 | 5 | 9 | 9 | 8 | 7 |
Swell 2 Height (m) Direction Period (s) | SE 10 | SSW 8 | SSE 8 | SSE 9 | SSE 9 | SE 11 | SSW 8 | SW 8 | SSW 7 | SSW 7 | SSW 7 | SE 14 | SE 14 | SSW 7 | SSW 7 | SSE 10 | SSE 10 | SE 4 | SSW 7 | SSW 7 | SSW 6 | SW 6 | SW 6 | SE 5 |
| kJ | 4 | 23 | 7 | 8 | 8 | 5 | 28 | 17 | 11 | 20 | 9 | 7 | 7 | 5 | 5 | 9 | 9 | 3 | 9 | 4 | 4 | 2 | 2 | 4 |
Swell 3 Height (m) Direction Period (s) | S 16 | SE 8 | S 16 | S 16 | — | S 9 | SE 11 | SE 9 | SW 8 | SSE 10 | SSE 10 | SE 14 | — | SSE 10 | SSE 10 | SE 13 | SE 13 | SSE 10 | SSE 10 | SSE 10 | SE 12 | SE 12 | SE 12 | SSE 9 |
| kJ | 5 | 3 | 5 | 5 | — | 2 | 5 | 3 | 3 | 10 | 10 | 7 | — | 10 | 10 | 7 | 7 | 9 | 9 | 9 | 6 | 6 | 6 | 8 |
Wind waves Height (m) Direction Period (s) | N 2 | N 3 | N 3 | NNE 3 | — | SSW 2 | — | — | — | — | SE 6 | S 6 | S 6 | ESE 3 | SE 5 | SE 5 | ESE 3 | ESE 4 | SE 4 | SE 5 | SSE 5 | SSE 5 | SSE 5 | — |
| kJ | 1 | 4 | 5 | 4 | — | 1 | — | — | — | — | 18 | 18 | 18 | 4 | 13 | 4 | 1 | 12 | 16 | 21 | 9 | 14 | 17 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 38 | 8 | 74 | 0 | 8 | 14 | 0 | 0 | 38 | 16 | 18 | 77 | 107 | 145 | 505 | 145 | 145 | 145 | 145 | 145 | 104 | 145 | 90 | 92 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||||
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