Surf Forecasts:
How big are the waves at Rock Island today (24 Aug):
- Morning surf: Morning surf (24 Aug, local time) - 2ft (0.6m), 18s period with SSE swell.
- Afternoon surf: Afternoon surf (24 Aug, local time) - 3ft (0.9m), 16s period with SSE swell.
- Evening surf: Evening surf (24 Aug, local time) - 5ft (1.5m), 14s period with SSE swell.
The current surf forecast for Rock Island at 2PM is: 0.9m 17s primary swell from a South-southeast direction and 1.0m 14s secondary swell from a South-southeast direction, 0.5m 3s secondary swell from a South direction (forecast issued at 08:00am August 24). The wind direction is predicted to be onshore.
| Time (JST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (24 Aug) | 2ft (0.6m) | 18s |
| Afternoon (24 Aug) | 3ft (0.9m) | 16s |
| Evening (24 Aug) | 5ft (1.5m) | 14s |
Table - waves today at Rock Island. (Swell directed towards the surf break)
Short Range ForecastSome drizzle, heaviest during Wed morning. Warm (max 30°C on Wed afternoon, min 26°C on Mon morning). Winds increasing (light winds from the S on Mon morning, fresh winds from the SW by Tue afternoon). | ||||||||||||||||||||||
Monday 24 | Tuesday 25 | Wednesday 26 | ||||||||||||||||||||
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 16 | SSE 18 | SSE 14 | SSE 16 | SSE 15 | SSE 14 | SSE 14 | SSE 14 | SSE 13 | SSE 13 | SSE 13 | SSE 12 | S 12 | S 12 | S 12 | S 11 | S 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 |
Wave Graph  | ||||||||||||||||||||||
 kJ | 138 | 260 | 362 | 480 | 856 | 911 | 615 | 861 | 700 | 690 | 484 | 298 | 403 | 396 | 319 | 149 | 271 | 236 | 145 | 217 | 206 | 203 |
Wind (km/h) | ||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | on | on | on | on | on | on | on | on | on | cross-on | cross-on | on | cross-on | on | on | on |
High Tide | 4:17PM1.34m | 1:21AM1.36m | 4:45PM1.39m | 2:39AM1.41m | 5:10PM1.43m | |||||||||||||||||
Low Tide | 8:12AM0.33m | 8:44PM1.17m | 9:11AM0.27m | 9:41PM1.08m | 10:00AM0.23m | |||||||||||||||||
 | | | | |  | | | | | | | | | | | |  | | | | | |
 | 5:07 | — | — | — | — | — | — | 5:07 | — | — | — | — | — | — | — | 5:07 | — | — | — | — | — | — |
 | — | — | — | — | 6:20 | — | — | — | — | — | — | — | 6:19 | — | — | — | — | — | — | — | 6:17 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — |
Temp °C | 26 | 26 | 27 | 27 | 28 | 27 | 27 | 26 | 26 | 27 | 29 | 29 | 29 | 28 | 27 | 27 | 27 | 28 | 28 | 30 | 30 | 28 |
Feels °C | 30 | 30 | 28 | 27 | 29 | 28 | 29 | 28 | 29 | 29 | 30 | 29 | 29 | 28 | 28 | 30 | 31 | 32 | 30 | 31 | 30 | 28 |
Swell 1 Height (m) Direction Period (s) | SE 12 | SSE 18 | SSE 14 | SSE 13 | SSE 15 | SSE 14 | SSE 14 | SSE 14 | SSE 13 | SSE 13 | SSE 13 | SSE 12 | S 12 | S 12 | S 12 | S 11 | S 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SSW 12 |
| kJ | 71 | 260 | 362 | 342 | 856 | 911 | 615 | 861 | 700 | 690 | 484 | 298 | 403 | 396 | 319 | 149 | 271 | 236 | 145 | 217 | 206 | 203 |
Swell 2 Height (m) Direction Period (s) | SSE 16 | SSE 12 | SSE 18 | SSE 16 | SW 9 | ESE 15 | S 17 | ESE 14 | E 14 | E 14 | S 16 | S 14 | E 13 | E 13 | E 13 | SSW 12 | SSW 5 | SSE 10 | SSE 10 | SSE 9 | SSE 9 | SSE 9 |
| kJ | 138 | 133 | 333 | 480 | 3 | 43 | 351 | 41 | 4 | 4 | 181 | 187 | 3 | 3 | 3 | 121 | 8 | 52 | 52 | 48 | 34 | 33 |
Swell 3 Height (m) Direction Period (s) | SSE 18 | SSE 15 | SW 10 | SW 8 | SW 10 | E 12 | ESE 15 | E 14 | ESE 14 | ESE 14 | E 14 | E 13 | E 13 | — | ESE 13 | SE 10 | SE 10 | SSW 4 | SSW 13 | E 12 | E 11 | E 11 |
| kJ | 66 | 84 | 4 | 3 | 15 | 24 | 42 | 37 | 41 | 66 | 4 | 3 | 31 | — | 33 | 25 | 25 | 7 | 102 | 3 | 3 | 2 |
Wind waves Height (m) Direction Period (s) | — | — | SSW 8 | S 3 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 4 | SSW 5 | SSW 5 | SSW 5 | SSW 5 | SW 4 | SW 4 | SSW 4 | SSW 4 | SSW 5 | SSW 5 |
| kJ | — | — | 13 | 5 | 10 | 11 | 10 | 10 | 9 | 6 | 15 | 43 | 50 | 35 | 25 | 15 | 20 | 15 | 10 | 25 | 47 | 44 |
Nearest Offshore or Glassy | ||||||||||||||||||||||
Distance (km) | 7 | 7 | 77 | 518 | 27 | 14 | 14 | 14 | 14 | 14 | 249 | 249 | 92 | 27 | 14 | 12 | 10 | 14 | 518 | 534 | 491 | 491 |
Best forecast wave conditions in Kanagawa | ||||||||||||||||||||||
Best forecast wave conditions in Japan | ||||||||||||||||||||||
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